1,720,955 research outputs found
Preliminary research on the treatment of leachate from municipal waste landfills in vegetation activated sludge systems
No full textThe deposited data were collected as part of the research project entitled "Preliminary studies on the treatment of leachates from municipal waste landfills in plant activated sludge systems", financed by the National Science Centre under the Miniatura competition (no. DEC-2023/07/X/ST10/00063).The main objectives were:1) to verify whether V-ASP systems demonstrate satisfactory efficiency in landfill leachate treatment, and to assess how HRT can affect the final removal efficiency of selected pollutants and process stability.2) To investigate the potential of low-cost adsorption materials, zeolite and sunflower husk biochar, to improve the treatment of leachate in V-ASP systems. The adsorption properties of zeolite and biochar in different variants of V-ASP systems were evaluated using FTIR and scanning electron microscope (SEM) analysis to better understand the contaminant removal mechanisms.Project duration from 30.05.2023 to 29.05.2024. Project carried out at the Wroclaw University of Environmental and Life Sciences.The attached files have been compressed to *.zip format. The dataset consists of the following files:The collection contains research results on:1) treatment efficiency - presented in the publication ”Removal of selected pollutants from landfill leachate in the vegetation-activated sludge process”,2) characteristics of materials - zeolite and sunflower husk biochar - presented in the publication ”Assessment of changes occurring in biochar/zeolite substrates used in the vegetation-activated sludge process in the treatment of leachate from landfills".The results obtained using the methods presented in detail in the methodology and supplementary materials to the articles. All reagents for the analyses were provided by MERCK (Germany). Atomic absorption spectrometry (AAS) was used to determine the content of heavy metals according to the ISO 15586:2003 standard. A Thermo Scientific Nicolet iN10 MX spectrometer with an external Nicolet iZ10 FTIR module (Thermo Fischer Scientific) was used for FTIR analysis. A scanning electron microscope with an EDS system (Quanta 250 LEICA EM ACE200, FEI, Oregano, USA) was used to characterize the morphology, microstructure and elemental composition of biochar and zeolite samples. The porous texture was characterized by nitrogen adsorption at 77K (ASAP2020, Micromeritics). </p
Phytotoxicity of landfill leachate after treatment
No full textThe deposited data were collected as part of the research project entitled "Preliminary studies on the treatment of leachates from municipal waste landfills in plant activated sludge systems", financed by the National Science Centre under the Miniatura competition (no. DEC-2023/07/X/ST10/00063).The aim of this study was to determine the phytotoxicity of raw landfill leachate (LL) and LL after treatment by analyzing its effects on root growth and seed germination in plants irrigated with LL.Project duration from 30.05.2023 to 29.05.2024. Project carried out at the Wroclaw University of Environmental and Life Sciences.The attached files have been placed as XLSX files.The dataset consists of the following files: phytotoxicity of landfill leachate after treatment -presented in the publication "Phytotoxicity of landfill leachate after treatment – assessment using seed germination bioassays".The results obtained using the methods presented in detail in the methodology and supplementary materials to the article.Toxicity tests were conducted using a Phytotoxkit™ acute toxicity bioassay, using three seed species: the dicotyledonous plants Sinapis alba L., Lepidium sativum L., and monocotyledonous plant Sorghum saccharatum.</p
Toxicity tests as a supplement to monitoring at municipal landfills
No full textCelem artykułu było przedstawienie potrzeby zastosowania testów toksyczności do oceny odcieków pochodzących ze składowisk odpadów komunalnych. Z prowadzonych obecnie badań wchodzących w skład monitoringu składowisk odpadów komunalnych trudno jest precyzyjnie określić, jakie związki chemiczne mogą znajdować się w odciekach oraz jaki wpływ mogą wywierać na organizmy bytujące w środowisku. Badania te, oparte w całości na parametrach fizykochemicznych, nie obrazują rzeczywistego zanieczyszczenia wód, ponieważ większość związków obecnych w odciekach pozostaje nieznana i stanowi potencjalne zagrożenie. Autor zarekomendował wykorzystanie dwóch rodzajów testów do badań odcieków ze składowisk odpadów komunalnych, prowadzonych na V. fischeri i D. magna, m.in. ze względu na niski koszt oraz łatwość przeprowadzonych badań. Zwraca również uwagę na fakt, że poszczególne składniki odcieków mogą wywoływać odmienne reakcje, powodując synergiczne lub antagonistyczne efekty toksyczne, które nie zostaną zidentyfikowane za pomocą analiz fizykochemicznych, a mogą zostać wykryte za pomocą testów toksyczności.The aim of this article is to present the need to use toxicity tests to assess the waste water from municipal landfills. It is difficult to determine precisely what chemical compounds can be found in leachate and what impact they can have on organisms living in the environment. These studies, based entirely on physicochemical parameters, do not illustrate the actual water pollution. The author recommended the use of two types of tests to test leachate from municipal waste dumps, carried out on V. fischeri and D. magna, among others due to the low cost and ease of the research carried out. The author draws attention to the fact that individual components of leachate may cause different reactions, causing synergistic or antagonistic toxic effects, which will not be identified by physicochemical analyses, but may be detected by means of toxicity tests
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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