Revista Internacional de Contaminación Ambiental
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Bioaccumulation of heavy metals in cucumber plants inoculated with Trichoderma strains (Hypocreaceae) in the Mezquital Valley, Hidalgo, Mexico
Get PDFIn the Mezquital Valley, Hidalgo, Mexico, wastewater is often used in agricultural systems which have caused negative environmental effects, such as edaphic heavy metal pollution. Consequently, plants in the area begin to absorb heavy metals. Therefore, the objective of this experiment was to evaluate the effects of Trichoderma harzianum and Trichoderma viride strains on bioaccumulation of Pb, Cd and Cr in inoculated cucumber plants (Cucumis sativus). The soil used in this study contains Pb, Cd and Cr (34.63, 0.24, and 32.32 mg/kg, respectively). In Trichoderma root colonization, the highest measurement was Trichoderma harzianum (100 %). The cucumber plants translocated Pb, Cr, and Cd to their fruits and leaves. Concentrations of Pb and Cd were higher in the basal leaves of the cucumber plant, whereas Cr was more concentrated in the cucumber fruits. Pb was not found in the cucumber skin. For Cd concentration in the skin, the T. harzianum and T. viride treatments at 2.34 × 106 and 2.34 × 106 CFU/mL, respectively, resulted in a 20.2 % reduction of this metal. Trichoderma, with 2.34 × 106 CFU/mL, had the lowest concentration of Cr in the pulp (5.572 mg/kg). No differences were found in metal concentrations in the skin or leaves.In the Mezquital Valley, Hidalgo, Mexico, wastewater is often used in agricultural systems which have caused negative environmental effects, such as edaphic heavy metal pollution. Consequently, plants in the area begin to absorb heavy metals. Therefore, the objective of this experiment was to evaluate the effects of Trichoderma harzianum and Trichoderma viride strains on bioaccumulation of Pb, Cd and Cr in inoculated cucumber plants (Cucumis sativus). The soil used in this study contains Pb, Cd and Cr (34.63, 0.24, and 32.32 mg/kg, respectively). In Trichoderma root colonization, the highest measurement was Trichoderma harzianum (100 %). The cucumber plants translocated Pb, Cr, and Cd to their fruits and leaves. Concentrations of Pb and Cd were higher in the basal leaves of the cucumber plant, whereas Cr was more concentrated in the cucumber fruits. Pb was not found in the cucumber skin. For Cd concentration in the skin, the T. harzianum and T. viride treatments at 2.34 × 106 and 2.34 × 106 CFU/mL, respectively, resulted in a 20.2 % reduction of this metal. Trichoderma, with 2.34 × 106 CFU/mL, had the lowest concentration of Cr in the pulp (5.572 mg/kg). No differences were found in metal concentrations in the skin or leaves
Metales interesantes de la familia III A: contaminación, toxicocinética y genotoxicidad del galio, indio y talio
Get PDFGallium (Ga), indium (In) and thallium (Tl) are three metals belonging to the group 13 (IIIA) of the periodic table of chemical elements and due to their many industrial, technological, agricultural, and medical applications, their presence has been increased in the environment and ecosystems. However, none of them have any recognized biological functions. The present review was carried out with the purpose of compiling the available information on contamination, human exposure, toxicokinetic and genotoxicity associated with Ga, In and Tl in their +3 oxidation state (in mammalian). Ga3+, In3+ and Tl3+ have particular properties that influence their mechanism of action, such as chemical composition, solubility and particle size; which in turn influence their associated toxicity. Several of their effects are associated with the exposure route, their absorption and entry into the cell, the ability to unbalance oxidant-antioxidant homeostasis, alter molecular functions and generate cell toxicity, as well as the ability to generate damage to biomolecules, including DNA. In general, the studies carried out on Ga3+, In3+ and Tl3+ show that they can induce several adverse effects that can have an impact on human health.El galio (Ga), indio (In) y talio (Tl) son tres metales pertenecientes a la familia 13 (IIIA) de la tabla periódica de los elementos químicos y por sus múltiples aplicaciones industriales, tecnológicas, agrícolas y médicas, se ha propiciado el incremento de su presencia en el ambiente y en los ecosistemas. Sin embargo, ninguno tiene funciones biológicas reconocidas. La presente revisión se realizó con la finalidad de compilar la información disponible sobre la contaminación, exposición humana, toxicocinética y genotoxicidad del Ga, In y Tl en estado de oxidación +3. El Ga3+, In3+ y Tl3+ tienen propiedades particulares que influyen en su mecanismo de acción, tal como la composición química, la solubilidad y el tamaño de la partícula; las cuales a su vez participan en los procesos de inducción de toxicidad. Varios de sus efectos están asociados con la ruta de exposición, su absorción y entrada a la célula, la capacidad de desbalancear la homeostasis oxidante-antioxidante, alterar las funciones moleculares y generar toxicidad celular. Asimismo, la capacidad de generar daño a las biomoléculas, entre ellas el ADN. En general, los estudios realizados sobre el Ga3+, In3+ y Tl3+ demuestran su capacidad de inducir varios efectos adversos que pueden repercutir en la salud humana
Primera aproximación experimental referente a la acumulación y deposición de microplásticos en líquenes
Get PDFOne of the most important problems related to plastic waste is the production of microplastics (MPs), whose accumulation in different taxa has been recorded. It was recently found through field sampling that lichens are able to accumulate MPs. The present work aims to experimentally study the accumulation and deposition of MPs in three lichen species of the genera Usnea, Ramalina and Punctelia. We measured the weight, water uptake and fractal dimension of each thallus. Under laboratory conditions, we exposed 12 thalli of each species to three different doses of MPs in aqueous suspension (3, 6, and ≤12 MP/mL) for one week. The accumulated and deposited MPs were extracted and counted. Accumulation was negligible. We modelled deposition with general linear models. The fractal dimension variable was the only one significantly related to deposited MPs. These results suggest that in communities with higher structural complexity, measured by fractal dimension, we will find higher levels of deposited MPs .Uno de los problemas más importantes relacionados con los desechos plásticos es la producción de MP (MP), cuya acumulación en diferentes taxones ha sido registrada. Recientemente se ha demostrado, a través de muestreo de campo, que los líquenes son capaces de acumular MP. El presente trabajo tiene como objetivo estudiar experimentalmente la acumulación y deposición de MP en tres especies de líquenes de los géneros Usnea, Ramalina y Punctelia. Medimos el peso, la absorción de agua y la dimensión fractal de cada talo. En condiciones de laboratorio, expusimos 12 talos de cada especie a tres diferentes dosis de MP en suspensión acuosa (3, 6 y 12 MP/mL) durante una semana. Se extrajeron y contabilizaron los MP acumulados y depositados. La acumulación fue despreciable. Modelamos la deposición con modelos lineales generales. La variable dimensión fractal fue la única que se relacionó significativamente con los MP depositados. Estos resultados sugieren que, en comunidades con complejidad estructural mayor, medidas en la dimensión fractal, se encontrarán niveles mayores de MP depositados
Nano-onions based on chitosan: Production and characterization
No full textThis work presents the morphology and characterization of chitosan nanoparticles crosslinked with lecithin in the form of nano-onions obtained by an easy, economical, and possibly scalable method from a polymeric precursor known as chitosan. The creation of new products by using shrimp waste is a fundamental factor in avoiding water pollution. These materials have a positive impact as they add value to waste, and they provide the opportunity to decrease pollution. Chitosan nano-onions were synthesized by an environmentally friendly, easy, and inexpensive method using chitosan as a natural source. Chitosan nano-onions (CSNO) were characterized by using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS) and specific surface area (SSA). The nano-onions characterization obtained by FTIR shows the presence of carbonyl groups at a wavenumber of 1752.12 cm–1, while the phosphate groups attributed to lecithin are observed at 1156.88 cm–1. XRD analysis confirmed an amorphous structure, while SEM images presented a globular morphology with concave surfaces. TEM analysis showed that the nano-onions are congregated in a unique structure that includes nanotubes. The CSNO average diameter by DLS was 442.5 nm with an octagonal arrangement, and a polydispersity index (PDI) of 0.532 and 31.9 mV. The average size of CSNO, the PDI, and the value of zeta potential were indicators of a stable dispersion with a specific superficial area measured by the Brunauer-Emmett-Teller (BET) method of 1.4 m2 g–1. The results of the chitosan-lecithin nano-onions characterization indicate changes in the surface of the material with a larger total surface area and pore structure, compared to that of pure chitosan. According to the results of the CHNO characterization, they could be used as adsorbents for contaminants and they also have a potential application in the biomedical area, mainly as drug encapsulation material.This work presents the morphology and characterization of chitosan nanoparticles crosslinked with lecithin in the form of nano-onions obtained by an easy, economical, and possibly scalable method from a polymeric precursor known as chitosan. The creation of new products by using shrimp waste is a fundamental factor in avoiding water pollution. These materials have a positive impact as they add value to waste, and they provide the opportunity to decrease pollution. Chitosan nano-onions were synthesized by an environmentally friendly, easy, and inexpensive method using chitosan as a natural source. Chitosan nano-onions (CSNO) were characterized by using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS) and specific surface area (SSA). The nano-onions characterization obtained by FTIR shows the presence of carbonyl groups at a wavenumber of 1752.12 cm–1, while the phosphate groups attributed to lecithin are observed at 1156.88 cm–1. XRD analysis confirmed an amorphous structure, while SEM images presented a globular morphology with concave surfaces. TEM analysis showed that the nano-onions are congregated in a unique structure that includes nanotubes. The CSNO average diameter by DLS was 442.5 nm with an octagonal arrangement, and a polydispersity index (PDI) of 0.532 and 31.9 mV. The average size of CSNO, the PDI, and the value of zeta potential were indicators of a stable dispersion with a specific superficial area measured by the Brunauer-Emmett-Teller (BET) method of 1.4 m2 g–1. The results of the chitosan-lecithin nano-onions characterization indicate changes in the surface of the material with a larger total surface area and pore structure, compared to that of pure chitosan. According to the results of the CHNO characterization, they could be used as adsorbents for contaminants and they also have a potential application in the biomedical area, mainly as drug encapsulation material
Occurrence of pesticide residues in fig crops (Ficus carica L.), in Morelos, Mexico
Get PDFThe state of Morelos is the main producer of figs in the Mexican Republic, contributing 50% of the national production. Despite the fact that the official regulations in Mexico only allow the use of some pesticides on figs, it is common to find residues of prohibited substances. This work aims to assess the occurrence of pesticide residues in the fig cultivation from 15 different parcels located in Morelos in order to determine their degree of dissipation and the resultant health risk. The fig samples were analyzed using the QuEChERS multi-residue extraction, followed by gas chromatography triple quadrupole mass spectrometer, and ultra-high-performance liquid chromatography tandem mass spectrometer. Nine pesticides were detected in the sampled crops, of which five were above the maximum allowed residue levels. The pesticides with the highest concentrations were thiophanate-methyl (0.733 mg/kg), chlorothalonil (0.445 mg/kg), propamocarb (0.395 mg/kg), and carbendazim (0.313 mg/kg). All Risk Health Index values were less than 1, indicating no risk to human health. However, it is noteworthy that dietary pesticide intakes estimated in this study considered only exposures from fig fruit and did not include other fruits, vegetables, grains, dairy, fish, or meat, among others. These findings suggest the need for a continuous monitoring program for pesticide residues in cultivated vegetables in Morelos.The state of Morelos is the main producer of figs in the Mexican Republic, contributing 50% of the national production. Despite the fact that the official regulations in Mexico only allow the use of some pesticides on figs, it is common to find residues of prohibited substances. This work aims to assess the occurrence of pesticide residues in the fig cultivation from 15 different parcels located in Morelos in order to determine their degree of dissipation and the resultant health risk. The fig samples were analyzed using the QuEChERS multi-residue extraction, followed by gas chromatography triple quadrupole mass spectrometer, and ultra-high-performance liquid chromatography tandem mass spectrometer. Nine pesticides were detected in the sampled crops, of which five were above the maximum allowed residue levels. The pesticides with the highest concentrations were thiophanate-methyl (0.733 mg/kg), chlorothalonil (0.445 mg/kg), propamocarb (0.395 mg/kg), and carbendazim (0.313 mg/kg). All Risk Health Index values were less than 1, indicating no risk to human health. However, it is noteworthy that dietary pesticide intakes estimated in this study considered only exposures from fig fruit and did not include other fruits, vegetables, grains, dairy, fish, or meat, among others. These findings suggest the need for a continuous monitoring program for pesticide residues in cultivated vegetables in Morelos
Zonificación de la capacidad protectora y vulnerabilidad a la contaminación del acuífero de Texcoco, Estado de México
Get PDFThis study estimated the protective capacity and natural intrinsic vulnerability of the Texcoco aquifer combining the Aquifer Vulnerability Index method (AVI) and the Dar Zarrouk geoelectric parameter (unitary longitudinal conductance, S). Lacustrine deposits, alluvial materials, and stratified volcanic deposits form the Texcoco aquifer. It is located in the east of the Valley of Mexico. Eighty-seven (87) Schlumberger vertical electric sounding (VES) were made and distributed in different profiles in the aquifer area. The VES data were collected in the field with a Terrameter SAS-300B resistivity meter with 750 m current electrode opening on both sides of a common center and interpreted with the Interpex IX1D software. The longitudinal conductance was obtained from the process of inversion of the data, and maps were elaborated with the kriging method and minimum curvature in Surfer V16. The thickness of the upper layer of the unsaturated zone varies between 0.3 and 10.5 m. The longitudinal conductance of the upper layer presents values from 0.0 to 75 Siemens/m. The groundwater level in the aquifer has an elevation of 2140 m asl in the south-central zone of the study area to 2290 m asl in the foothills of the Sierra de Río Frío. The AVI method allows us to correlate the hydraulic conductivity Kv (m/d) data and the thickness h (m) of the unsaturated zone to determine values of the hydraulic resistance C = 1.4 to 3.9 days. The obtained results are of interest to the municipal authorities in planning and deciding to preserve the underground water resource.El estudio consistió en estimar la capacidad protectora y vulnerabilidad intrínseca natural del acuífero de Texcoco, mediante la combinación del método Índice de Vulnerabilidad del Acuífero (AVI, por su sigla en inglés) y el parámetro geoeléctrico de Dar Zarrouk (conductancia longitudinal unitaria, S). El acuífero de Texcoco, constituido por materiales lacustres, aluviales y depósitos volcánicos, se localiza al oriente del Valle de México. Se realizaron 87 sondeos eléctricos verticales Schlumberger (SEV) distribuidos en la zona del acuífero. Los datos de los SEV en campo se adquirieron con un resistivímetro Terrameter SAS-300B con abertura de electrodos de corriente de 750 m a ambos lados de un centro común y se interpretaron con el programa de computadora IX1D de Interpex. La conductancia longitudinal unitaria se obtuvo a partir de la inversión de los datos de campo y se elaboraron mapas de contornos con el método kriging y de mínima curvatura en Surfer V16. El espesor de la capa superior de la zona no saturada varía entre 0.3 y 10.5 m. La conductancia longitudinal de la capa superior presenta valores de 0.0 a 75 Siemens/m. El nivel del agua subterránea en el acuífero presenta una elevación de 2140 msnm en la zona centro sur y 2290 msnm en las estribaciones de la Sierra de Río Frío. Con el método AVI, a partir de los datos de la conductividad hidráulica, Kv (m/d) y el espesor h (m) de la zona no saturada, se obtuvieron valores de la resistencia hidráulica C = 1.4 a 3.9 días. Los resultados obtenidos son de interés para las autoridades municipales en la planeación y toma de decisiones
Boron adsorption on modified zeolites: Effect of modifier and source of water
Get PDFThe removal of boron from drinking water is a concern in various parts of the world due to the toxic effects of this metalloid in high concentrations. In this paper, zeolites LTL and FAU X were synthesized and modified with salts of nickel (NiCl2), iron (FeCl3), and aminopropyltriethoxysilane (APS) in order to promote their affinity for boron species present in aqueous systems. The adsorption capacity of modified zeolites for boron was evaluated in a synthetic boron solution and with groundwater samples for human use. The effect of the pH and zeolite dose was studied in adsorption tests using groundwater. The modified zeolites were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen physisorption, and Fourier-transform infrared spectroscopy. Results indicated that the modification of zeolites favors affinity for boron species. The highest adsorption capacity of boron on zeolites was achieved in the synthetic solution. The adsorption capacity of the modified zeolites depended on the pH, the electrical conductivity, the modifying agent, the zeolitic structure, and the dose of adsorbent. The zeolitic structure-modifying agent interaction was decisive for boron adsorption capacity, with LTL-Ni zeolite being the best-performing adsorbent, thanks to its textural properties and nickel’s ability to form complexes with boron species.The removal of boron from drinking water is a concern in various parts of the world due to the toxic effects of this metalloid in high concentrations. In this paper, zeolites LTL and FAU X were synthesized and modified with salts of nickel (NiCl2), iron (FeCl3), and aminopropyltriethoxysilane (APS) in order to promote their affinity for boron species present in aqueous systems. The adsorption capacity of modified zeolites for boron was evaluated in a synthetic boron solution and with groundwater samples for human use. The effect of the pH and zeolite dose was studied in adsorption tests using groundwater. The modified zeolites were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen physisorption, and Fourier-transform infrared spectroscopy. Results indicated that the modification of zeolites favors affinity for boron species. The highest adsorption capacity of boron on zeolites was achieved in the synthetic solution. The adsorption capacity of the modified zeolites depended on the pH, the electrical conductivity, the modifying agent, the zeolitic structure, and the dose of adsorbent. The zeolitic structure-modifying agent interaction was decisive for boron adsorption capacity, with LTL-Ni zeolite being the best-performing adsorbent, thanks to its textural properties and nickel’s ability to form complexes with boron species
Market competition and risk assessment of nanofiber composite materials
Get PDFNano cellulose has the advantages of high degree of polymerization, high strength, degradability, and large specific surface area. The modifier is uniformly dispersed in the matrix material to form a composite system containing nano-scale materials in one phase. With regard to the above-mentioned competitive situation of performance fibers, China should first strengthen the research on engineering scale-up, focusing on finding the factors that affect product quality and dispersion coefficient from engineering issues, and making continuous improvements. Using the analytic hierarchy process method, according to the idea of first decomposition and then synthesis, through pairwise comparison between risk indicators, the risk weights of risk factors at various levels in the risk assessment index system are rigorously calculated and sorted, and the degree of membership and validity are compared. The risk assessment index is judged, the fuzzy clustering algorithm is used to identify the bad data in the market competition data, and the conditional value-at-risk (CVaR) model is constructed to conduct risk assessment. Experimental results show that the actual logarithmic rate of return fluctuates around 0, most of which are higher than the Va R value. Only in extreme cases will it break the Va R curve; the accuracy of risk assessment is close to 100%, and the (Tech-Sector Volatility)TSV indicator begins to decline significantly. That is, the transmission sensitivity of risk data is effectively improved.Nano cellulose has the advantages of high degree of polymerization, high strength, degradability, and large specific surface area. The modifier is uniformly dispersed in the matrix material to form a composite system containing nano-scale materials in one phase. With regard to the above-mentioned competitive situation of performance fibers, China should first strengthen the research on engineering scale-up, focusing on finding the factors that affect product quality and dispersion coefficient from engineering issues, and making continuous improvements. Using the analytic hierarchy process method, according to the idea of first decomposition and then synthesis, through pairwise comparison between risk indicators, the risk weights of risk factors at various levels in the risk assessment index system are rigorously calculated and sorted, and the degree of membership and validity are compared. The risk assessment index is judged, the fuzzy clustering algorithm is used to identify the bad data in the market competition data, and the conditional value-at-risk (CVaR) model is constructed to conduct risk assessment. Experimental results show that the actual logarithmic rate of return fluctuates around 0, most of which are higher than the Va R value. Only in extreme cases will it break the Va R curve; the accuracy of risk assessment is close to 100%, and the (Tech-Sector Volatility)TSV indicator begins to decline significantly. That is, the transmission sensitivity of risk data is effectively improved
Efecto de la dieta para bovinos a base de Leucaena leucocephala en las emisiones de N2O en parche de orina simulado en un sistema silvopastoril en la época de estiaje
Get PDFN2O has a global warming potential of 300 times greater than CO2, and in silvopastoral systems, urine is a source of N2O emission. The objective of the research was to evaluate the effect of the diet for bovines based on Leucaena leucocephala on N2O emissions in a simulated urine patch in a silvopastoral system. A Cynodon plectostachyus meadow was used, and 13 samplings were carried out during March - April 2021. The treatments were, A: 20 kg of urea/ha from bovine urine fed with 100% C. plectostachyus hay + 0% L leucocephala, B: 36 kg of urea/ha from the urine of bovines fed with 16% of L. leucocephala + 84% of C. plectostachyus and C: 79 kg of urea/ha from the urine of bovines fed with 33% L. leucocephala + 67% C. plectostachyus. A completely randomized design with four replicates was used. Static closed stainless-steel chambers were used to obtain gas samples at 0, 10, 20 and 30 minutes. Environmental temperature, pH, humidity, nitrate and ammonium contents in the soil were recorded. Data were analyzed with the statistical program SAS 9.0. The N2O emission flux (μg/m2/h) between treatments did not present significant differences. The emission peak was observed on the fourth day of sampling in the treatments (A: 17.49, B: 23.71 and C: 22.88 μg N2O N m2/h). In addition, there was a positive correlation between the N2O flux and soil moisture. The increase in the amount of L. leucocephala in the diet of the animals did not influence the emission of N2O, due to the concentration of urea in the urine. However, a positive correlation with soil moisture was observed.El N2O tiene un potencial de calentamiento global de 300 veces mayor que el CO2 y en los sistemas silvopastoriles, la orina es una fuente de emisión de N2O. El objetivo de la investigación fue evaluar el efecto de la dieta para bovinos a base de Leucaena leucocephala sobre las emisiones de N2O en parche de orina simulado en un sistema silvopastoril. Se utilizó una pradera de Cynodon plectostachyus y se realizaron 13 muestreos durante marzo - abril de 2021. Los tratamientos fueron A: 20 kg de urea/ha a partir de orina de bovinos alimentados con 100 % heno de C. plectostachyus + 0 % de L. leucocephala, B: 36 kg de urea/ha a partir de orina de bovinos alimentados con 16 % de L. leucocephala + 84 % de C. plectostachyus y C: 79 kg de urea/ha a partir de orina de bovinos alimentados con 33 % de L. leucocephala + 67 % de C. plectostachyus Se utilizó un diseño completamente al azar con cuatro repeticiones. Se utilizaron cámaras de acero inoxidable cerradas estáticas para la obtención de muestras de gases a los 0, 10, 20 y 30 minutos. Se registraron la temperatura ambiental, pH, humedad, contenidos de nitrato y amonio en el suelo. Se analizaron los datos con el programa estadístico SAS 9.0. El flujo de emisión de N2O (μg m2/h) entre tratamientos no presentó diferencias significativas. El pico de emisión se observó en el cuarto día de muestreo en los tratamientos (A: 17.49, B: 23.71 y C: 22.88 μg N2O N m2/h). Además, existió una correlación positiva entre el flujo de N2O y la humedad del suelo. El incremento de la cantidad de L. leucocephala en la dieta de los animales no influyó sobre la emisión de N2O, debido a la concentración de urea en la orina. Sin embargo, se observó una correlación positiva con la humedad del suelo
Percepciones sociales sobre la calidad del agua en la Laguna de Yuriria, Guanajuato, México
Get PDFThis study presents the social perceptions of tourists, local people, government officials, bird watchers, fishermen, and producers of goods and services concerning the management, monitoring, solutions, responsibilities, and condition of the water quality in the Laguna de Yuriria, Guanajuato. The information was obtained through semi-structured interviews and digital questionnaires designed to be remotely applied due to the pandemic caused by a new coronavirus (COVID-19). Overall, 71 persons participated. The data obtained were processed with the R package for Qualitative Data Analysis (RQDA) and were grouped into the three dimensions of human well-being (material, relational, and subjective). Of the interviewees, 7.05 % considered the water quality to be good, 18.30 % regular, 42.26 % bad, and 12.67 % very bad, while 19.72 % did not know the subject. Government officials consider that the water quality condition is due to poor management and public administration. Bird watchers warn that the water quality is poor, and it affects the biodiversity of species. Most fishermen consider that the water quality is regular and that the lagoon still sustains the economy of their families and the communities of La Angostura and Los Tepetates. This perceptions helped to obtain a social analysis of the lagoon’s water quality. They can be lead to the strengthening and creation of strategies for managing and conserving this water body.El presente estudio expone las percepciones sociales de turistas, pobladores locales, funcionarios de gobierno, observadores de aves, pescadores y productores con relación al manejo, monitoreo, soluciones, responsabilidades y condición de la calidad del agua de la Laguna de Yuriria, Guanajuato. La información se obtuvo mediante entrevistas semiestructuradas y cuestionarios diseñados para aplicarse a distancia debido a la pandemia ocasionada por un nuevo coronavirus (COVID-19). En total, participaron 71 personas. Los datos obtenidos se procesaron a través del programa R para el Análisis de Datos Cualitativos (RQDA) y fueron agrupados en las tres dimensiones del bienestar humano (material, relacional y subjetiva). El 7.05 % del total de los entrevistados consideró que la calidad del agua es buena, el 18.30 % regular, el 42.26 % mala y el 12.67 % muy mala. El 19.72 % desconoció el tema. Los funcionarios consideran que la condición de la calidad del agua se debe a una mala gestión y administración pública. Los observadores de aves advierten que la calidad del agua es mala y que a menor calidad del agua menor biodiversidad de especies. La mayoría de los pescadores considera que la calidad del agua es regular y que la laguna mantiene la economía de sus familias y de las comunidades de La Angostura y Los Tepetates. Estas percepciones ayudaron a obtener un análisis social de la calidad del agua en la laguna y pueden derivar en el reforzamiento y la creación de estrategias para el manejo y la conservación de este cuerpo de agua