146 research outputs found
Treatment of water turbidity and bacteria by using a coagulant extracted from Plantago ovata
No full textA biocoagulant was successfully extracted from Plantago ovata by using an FeCl3-induced crude extract (FCE). The potential of FCE to act as a natural coagulant was tested for clarification using the turbid water of a river. Experimental tests were performed to evaluate the effects of turbidity concentration, coagulant quantity, water pH, and humic acid concentration on the coagulation of water turbidity by FCE. The maximum turbidity removal was occurred at water pH<8. At the optimum dosage of FCE, only 0.8 mg/L of dissolved organic carbon was released to the treated water. An increase in the humic acid led to the promotion of the water turbidity removal. Results demonstrated that the FCE removed more than 95.6% of all initial turbidity concentrations (50–300 NTU). High bacteriological quality was achieved in the treated water. FCE as an eco-friendly biocoagulant was revealed to be a very efficient coagulant for removing turbidity from waters
Zn+2 removal from the aqueous environment using a polydopamine/hydroxyapatite/Fe3O4 magnetic composite under ultrasonic waves
No full textIn this study, an easily magnetically recoverable polydopamine (PDA)-modified hydroxyapatite (HAp)/Fe3O4 magnetic composite (HAp/Fe3O4/PDA) was suitably synthesized to exploit its adsorption capacity to remove Zn2+ from aqueous solution, and its structural properties were thoroughly examined using different analytical techniques. The effect of multiple parameters like pH, ultrasonic power, ultrasonic time, adsorbent dose, and initial Zn2+ concentration on the adsorption efficiency was assessed using RSM-CCD. According to the acquired results, by increasing the adsorbent quantity, ultrasonic power, ultrasonic time, and pH, the Zn2+ adsorption efficiency increased and the interaction between the variables of ultrasonic power/Zn2+ concentration, pH/Zn2+ concentration, pH/absorbent dose, and ultrasonic time/adsorbent dose has a vital role in the Zn2+ adsorption. The uptake process of Zn2+ onto PDA/HAp/Fe3O4 followed Freundlich and pseudo-second order kinetic models. The maximum capacity of Zn2+ adsorption (qm) obtained by PDA/HAp/Fe3O4, HAp/Fe3O4, and HAp was determined as 46.37 mg g-1, 40.07 mg g-1, and 37.57 mg g-1, respectively. Due to its good performance and recoverability (ten times), the HAp/Fe3O4/PDA magnetic composite can be proposed as a good candidate to eliminate Zn2+ ions from a water solution
Characterization, kinetic, and isotherm data for Cr (VI) removal from aqueous solution by Populus alba biochar modified by a cationic surfactant
No full textAbstractPopulus alba is fast and auto- growing tree which profoundly accessible in around the world. The usage of the wastes of this tree would be admirable from environmental and solid waste management point of view. Thus, herein, this data set presents a facile method for providing an adsorbent from wastes of P. alba tree. The prepared adsorbent was modified by the cationic surfactant of (C16H33)N(CH3)3Br and applied to remove Cr (VI) from aqueous solution. The characterization data of the modified adsorbent were analyzed using FTIR and SEM methods. The information regarding kinetics, isotherms, and thermodynamics of chromium ions adsorption were listed. The data implied that the maximum adsorption capacity of adsorbent to uptake Cr (VI) from aqueous solution was obtained 52.63mg/g. The acquired data indicated that the adsorption of Cr (VI) by the adsorbent prepared from P. alba is an promising technique for treating Cr-bearing wastewaters
Data of heavy metals biosorption onto Sargassum oligocystum collected from the northern coast of Persian Gulf
No full textAbstractThis data article presents a simple method for providing a biosorbent from Sargassum oligocystum harvested from the northern coast of Persian Gulf, Bushehr, Iran. The characterization data of Sargassum oligocystum biochar (SOB) were analyzed using various instrumental techniques (FTIR and XPS). The kinetics, isotherms, and thermodynamics data of Hg2+, Cd2+, and Cu2+ ions onto SOB were presented. The maximum biosorption capacity of SOB to uptake Hg2+, Cd2+, and Cu2+ ions from aqueous solution was obtained 60.25, 153.85, and 45.25mg/g, respectively. The experimental data showed that biochar prepared from Sargassum oligocystum is an efficient and promising biosorbent for the treatment of heavy metals-bearing wastewaters
Study of phenol adsorption from wastewater using pumice modified by Mg/Cu bimetallic particles
No full textBackground and Aims: The major sources of phenol pollution in the aquatic environment are wastewaters from dyeing, pesticide, polymeric resins, petroleum and petrochemicals industries. Introducing phenolic compounds into the environment especially water bodies are one of the most important issues due to their toxicity for human and aquatic organisms. The aim of this work was to assess the capability of pumice- bimetal particles as an adsorbent for phenol removal from wastewater.Materials and Methods: In this experimental study, the pumice volcanic stone that was provided from the Kurdistan province was used. The pumice particles (mesh 30) were modified by metals of magnesium and copper, as bimetal compound. The functional groups and specific surface area of pumice-bimetal particles were determined. After the preparation of a synthetic wastewater contain phenol, the influences of parameters including wastewater pH (2–12), reaction time (3–60 min), initial phenol concentration (25- 150 mg/L), and the adsorbent dose (0.5–2.5 mg/L) were investigated. The phenol concentration was measured using photometric method. Adsorption isotherm was evaluated using Freundlich and Langmuir models.Results: The specific surface area, total pore volume, and mean pore diameter were determined to 4.67 m2/g, 0.0046 m3/g, and 48.23 nm, respectively. Results showed that the pumice-bimetal exhibited the best performance for phenol removal (97.3%) at dose 2 mg/L, pH 8, and contact time 30 min. The equilibrium data fitted well with the Freundlich model (R2= 0.985).Conclusions: According to results, the pumice-bimetal particles are an efficient adsorbent and promising option for eliminating various concentrations of phenol from water and wastewater.Key words: Adsorption, Isotherm, Phenol, Pumice-bimetal, Wastewate
مطالعه جذب فنل از فاضلاب توسط پاميس اصلاح شده با ذرات بى متاليك منيزيم/مس
No full textBackground and Aims: The major sources of phenol pollution in the aquatic environment are wastewaters from dyeing, pesticide, polymeric resins, petroleum and petrochemicals industries. Introducing phenolic compounds into the environment especially water bodies are one of the most important issues due to their toxicity for human and aquatic organisms. The aim of this work was to assess the capability of pumice- bimetal particles as an adsorbent for phenol removal from wastewater.Materials and Methods: In this experimental study, the pumice volcanic stone that was provided from the Kurdistan province was used. The pumice particles (mesh 30) were modified by metals of magnesium and copper, as bimetal compound. The functional groups and specific surface area of pumice-bimetal particles were determined. After the preparation of a synthetic wastewater contain phenol, the influences of parameters including wastewater pH (2–12), reaction time (3–60 min), initial phenol concentration (25- 150 mg/L), and the adsorbent dose (0.5–2.5 mg/L) were investigated. The phenol concentration was measured using photometric method. Adsorption isotherm was evaluated using Freundlich and Langmuir models.Results: The specific surface area, total pore volume, and mean pore diameter were determined to 4.67 m2/g, 0.0046 m3/g, and 48.23 nm, respectively. Results showed that the pumice-bimetal exhibited the best performance for phenol removal (97.3%) at dose 2 mg/L, pH 8, and contact time 30 min. The equilibrium data fitted well with the Freundlich model (R2= 0.985).Conclusions: According to results, the pumice-bimetal particles are an efficient adsorbent and promising option for eliminating various concentrations of phenol from water and wastewater.زمينه و هدف: منابع اصلى آلودگى فنل در محيط هاى آبى، فاضلاب هايى هستند كه از صنايع رنگرزى، آفت كش، رزين هاى پليمرىو نفت و پتروشيمى نشات مى گيرند. ورود تركيبات فنلى به محيط به خصوص منابع آبي به دليل خواص سمي آن براي انسان وموجودات آبزي يكي از معضلات مهم بهداشتى محسوب مي گردد. هدف از اين مطالعه استفاده از پاميس-بى متال بعنوان جاذب براىحذف فنل از فاضلاب است.مواد و روش ها: در اين مطالعه تجربى از سنگ آتشفشانى پاميس كه از استان كردستان تهيه شده بود، استفاده گرديد. ذرات پاميس(مش 30 ) با فلز منيزيم و مس به عنوان تركيب بى متال اصلاح شد. گروه هاى عاملى و سطح ويژه پاميس- بى متال تعيين گرديد
نتيجه گيري: مطابق با يافته ها، پاميس- بى متال يك جاذب كارآمد و گزينه اى اميدوار كننده براى حذف غلظت هاى مختلف فنل ازآب و فاضلاب مى باشد
<span style="font-size:11.0pt;mso-bidi-font-size: 10.0pt;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:FA" lang="EN-US">Adsorption potential of NH<sub>4</sub>Br-soaked activated carbon for cyanide removal from wastewater</span>
No full text183-193An adsorbent has been prepared <span style="mso-fareast-font-family:
Calibri" lang="EN-GB">from Populus
alba using the <span style="mso-fareast-font-family:
Calibri" lang="EN-GB">NH4Br-soaked activated carbon (NBAC) for cyanide
removal. <span style="mso-fareast-font-family:
Calibri" lang="EN-GB">A series of tests have been conducted to evaluate the influence of the main parameters such as the wastewater pH, reaction time, cyanide
concentration, and the <span style="mso-fareast-font-family:
Calibri" lang="EN-GB">NBAC quantity obtained upon the adsorption of
cyanide onto NBAC. At an optimum pH of 9,
more than 97% of the 200 mg/L cyanide is removed by a low NBAC dose
of 1.25 mg/L during
a 40 min contact time. Kinetic and isotherm modeling studies demonstrate that
the experimental data best fit a pseudo-second order and Langmuir model,
respectively. The maximum Langmuir adsorption capacity has been attained 102.5
mg/g at 24°C. Thermodynamic
study of cyanide adsorption by <span style="mso-fareast-font-family:
Calibri" lang="EN-GB">NBAC has also been carried out. The efficacy
of NBCA has been examined by analyzing the removal of cyanide from an
industrial wastewater. Overall, <span style="mso-fareast-font-family:
Calibri" lang="EN-GB">NBAC is an efficient and low-cost adsorbent
for the removal of different concentrations of cyanide from wastewaters.
</span
Data on biodegradation of total petroleum hydrocarbons using co-composting of cow manure/oily drill wastes
No full textAbstractOil drill cuttings are challenging wastes in oil sites especially in Khuzestan province, a major oil producing region in Iran. As co- composting is a simple and eco- friendly technique for bioremediation of oil base drill cutting, this data article designed to describe co- composting of oil base drill cutting with cow manure. The data suggest that with optimized mixture of cow manure/oily drill wastes (here, 20:1) could engender more effective treatment of the wastes (with final total petroleum hydrocarbon of 0.01g/Kg). The data will be informative for oil drilling companies and environmental agencies for choosing it as a practical bioremediation process of soil/wastes polluted by petroleum hydrocarbons
Comparative study of sun-dried and oven-dried Malva sylvestris biomass for high-rate Cu(II) removal from wastewater
No full textThis study compared the sun- and oven-dried powdered Malva sylvestris for removing Cu(II) from aqueous solution. The fresh and Cu-loaded adsorbents characteristics were analyzed by Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller testing and scanning electron microscopy. The studied parameters that affect adsorption capacity were pH (2–7), initial copper concentration (50–150 mg/L), contact time (3–60 min), adsorbent dosage (1–20 g/L) and temperature (10–35 °C). The results showed that the maximum removal of Cu(II) was observed at pH 5 for both adsorbents. The amount of Cu(II) adsorbed onto both adsorbents increased as the contact time and the initial concentration of Cu(II) increased. The adsorbents exhibited the highest Cu(II) removal at a temperature of 35 °C. The adsorption data obtained at different temperatures was described well by the Langmuir isotherm (qm = 172.61–202.81 mg/g for oven-dried and 118.49–133.45 mg/g for sun-dried) and the pseudo second-order kinetic model (R2 = 0.999 and 0.993–0.997 for oven- and sun-dried, respectively). An electroplating wastewater sample was effectively treated using oven-dried powdered M. sylvestris. The adsorption efficiency of the oven- and sun-dried M. sylvestris after five reuses was 70.4% and 26.1%, respectively. Generally, the oven-dried adsorbent was shown to be more effective than the sun-dried for removal of Cu(II) from wastewater. The cost assessment indicated that the oven-dried M. sylvestris is a more economical adsorbent than sun-dried one. © 201
Experimental data for synthesis of bi-metalized chitosan particle for attenuating of an azo dye from wastewater
No full textAbstractIn this data article, we introduce data acquired from new adsorbent, bi-metalized chitosan particle that is successfully synthesized and applied to remove the orange II dye, an azo dye, from textile wastewater. The adsorbent was meso- and macro-porous material with BET surface area of 12.69m2/g and pHzpc 6.6. The simulated textile-wastewater can be significantly treated using a relatively low quantity of the adsorbent. Overall, the use of bi-metalized chitosan particle can be considered a promising method for eliminating the azo dye from wastewater effectively. Accordingly, these data will be useful for decolorizing of azo dyes from textile wastewater
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