Environment and Pollution最新文献

{"title":"Fixation of BiOI/BiOBr/MoS2 Powders on Fiber Cloths for Photocatalytic Degradation of Ammonia Nitrogen from Aqueous Solution","authors":"Yi Wei, P. Tang, Minfeng Huang, Yongzhang Pan","doi":"10.5539/ep.v9n1p14","DOIUrl":"https://doi.org/10.5539/ep.v9n1p14","url":null,"abstract":"A novel photocatalyst powder, BiOI/BiOBr/MoS2, was synthesized by a simple solvothermal method. X-ray diffraction (XRD), specific surface area and pore size analyses, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray energy spectrometry (EDS) were utilized to characterize the prepared samples. After evaluating the photocatalytic performance of the catalyst, it was loaded on the glass fiber and carbon fiber by polyvinylidene fluoride (PVDF) and N-methylpyrrolidone, respectively. The photocatalytic activity of the composite was investigated by the degradation of ammonia nitrogen wastewater. The fiber cloth solved the problem of separation of powder from solution after reaction, and the presence of the binder reduces the agglomeration of the nanoparticles in the water. After four times repeated experiments, the degradation of simulate ammonia nitrogen wastewater by loaded glass fiber and loaded carbon fiber are 74.1% and 60.58%. Fixation of BiOI/BiOBr/MoS2 powders on fiber cloth solve the problem of difficult recovery of powder photocatalytic materials and it can be recycled, which has economic valuable.","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87133875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contamination and Potential Ecological Risk Factors of Potentially Toxic Elements Present in the Soil of Shooting Range: Comparison with the Global Soils","authors":"Saba Shoukat, S. Nazneen, S. Khan, U. Zafar","doi":"10.5539/ep.v9n1p37","DOIUrl":"https://doi.org/10.5539/ep.v9n1p37","url":null,"abstract":"This study was carried out to determine potentially toxic element (PTE) contamination and their potential ecological risk factors in shooting range soil. For this purpose soil samples were collected from different locations (left side, right side, shooting point, middle, and stop-butt) from the shooting range of Frontier Corps Training Centre (FCTC) present in Warsak, Peshawar. The soil samples were analyzed for pH, electrical conductivity (EC) and potentially toxic elements including Cd, Cr, Ni, Pb, and Zn. The strong acids digested extracts were analyzed using atomic absorption spectrophotometry to determine the concentrations of selected PTEs. The concentration of Pb was found to be maximum at stop-butt i.e. 2049 mg/kg and exceeded the United States Environmental Protection Agency (US-EPA) critical value of 400 mg/kg, while its concentrations at left, right, shooting point and middle were 14.0 mg/kg, 18.8 mg/kg, 47.4 mg/kg, and 18.2 mg/kg, respectively and exceeded the background level of normal soils which is 10 mg/kg for Pb. This study revealed that the shooting range soil was highly contaminated with Pb, and very high contamination factor and potential ecological risk for Pb was observed at stop-butt, very high contamination factor and potential ecological risk for Cd, while moderate contamination factor for Zn was observed at all locations of the shooting range. In Pakistan, the environmental perspective of shooting range soils is overlooked and there is a need to take steps to avoid such contamination of soils with Pb and other PTEs that can enter into food chains and can also leach to contaminate the aquifer. Replacement of vegetation of shooting range with PTE tolerant species, addition of soil conditioners and uncontaminated soil would reduce the mobility of these contaminants into aerial portions of plants and protect the groundwater contamination.","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78133887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reviewer acknowledgements for Environment and Pollution, Vol. 9, No. 1","authors":"A. John","doi":"10.5539/ep.v9n1p54","DOIUrl":"https://doi.org/10.5539/ep.v9n1p54","url":null,"abstract":"Reviewer acknowledgements for Environment and Pollution, Vol. 9, No. 1, 2020.","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141219893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aliphatic Hydrocarbons in Recent Dated Sediment Cores of Imo River, SE Nigeria: Environmental/Historical Implications","authors":"I. Oyo-Ita, U. Umoh, Ugim S. Ugim, E. Oyo-ita, O. Oyo-ita","doi":"10.5539/ep.v9n1p26","DOIUrl":"https://doi.org/10.5539/ep.v9n1p26","url":null,"abstract":"Four recent sediment cores (0-30 cm long) from Afam (AF), Mangrove (MG), Estuary (ES) and illegal Petroleum refinery (PT) sites of the Imo River, Southeastern Nigeria were analyzed to characterize the sources and distribution of organic matter (OM), as well as examine their historical trends of deposition and assess human-induced changes in the last ca. 5 decades using biomarker approach. Radionuclides 210Pb and 137Cs were used to assign approximate dates to each section of the cores. Evaluation of proxy parameters such as carbon preference index (CPI, 2.01 - 2.19), carbon number maximum (Cmax, 29, 31) and atomic C/N (16.51-31.32) for the most recent top layers (0-5 cm) revealed greater wash-in of land-derived organic matter (OM), attributable to the recent rise in water height. The bottom layer (PT1, 25-30 cm,) of the PT core deposited ca. 1964-1972 exhibited a CPI of 0.97 and pristane/phytane (Pr/Ph, 3.75), suggesting that oil bunkering/illegal refinery activity had begun in the region ca. 8 years after the first commercial discovery of oil in Nigeria in 1956. The occurrence in high abundance of heptadecane in the middle layer (ES4, 10-15 cm) of the ES almost corresponded with the period of eutrophication that blocked the waterway in the late 1980s. Measurement of a marked unresolved complex mixture at the near-top layer (AF5, 5-10 cm) of the AF indicated that the heaviest contamination by petroleum hydrocarbons occurred at ca. 1997-2005. This time frame coincided with the period of intensive bunkering and oil pipeline vandalism by Niger Delta militant groups.","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90480981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Africa’s Urban Waste Management and Sanitation Challenges: Are Transfer Stations the Solution?","authors":"Bob O. Manteaw, Johannes Boachie","doi":"10.5539/ep.v9n1p1","DOIUrl":"https://doi.org/10.5539/ep.v9n1p1","url":null,"abstract":"Africa’s urbanization processes are seen as both a challenge and an opportunity for sustainable development. While these processes unfold differently in diverse countries across the continent, it has become increasingly apparent that surge urbanization, population growth and the lack of effective planning for an efficient waste management system have brought in its wake other challenges that have significant implications for public health and sustainable development. Thus, much as urbanization has the potential to drive Africa’s growth and sustainable development agenda, current happenings in most of Africa’s cities, in particular, also signal the negative impact of rapid and unplanned urbanization on sustainable development processes. Waste and sanitation management have become an enduring urban challenge across Africa. They come with significant cost to people and governments and as the search for lasting solutions continue, Waste Transfer Stations have emerged as an efficient management technology which has been embraced and deployed in some countries. While it has received praises in some quarters as an innovative technology, there is concern that such praises have muted critical issues of pollution, odor nuisance, cultural incompatibility and public health challenges, which, for the most part, are unrecognized or underestimated. The question then becomes: are Waste Transfer Stations the solution to Africa’s urban waste and sanitation challenges?","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87778285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does Knowledge about Earthquake Vary with Respondent’s Socio-Demographic Dimensions? A Study in Sylhet City of Bangladesh","authors":"M. Ahmed","doi":"10.5539/ep.v8n2p8","DOIUrl":"https://doi.org/10.5539/ep.v8n2p8","url":null,"abstract":"The prime and foremost purpose of this study was to explore climate change perception among indigenous people living in Sylhet, Bangladesh. This study also tried to investigate the nexus between some socio-demographic dimensions of the respondents and their perception regarding climate change. The present study followed descriptive-explanative research design where survey method used to collect necessary data. In case of survey method, a self-developed semi structured questionnaire was provided to the respondents for collecting relevant data. Total number of population was 75 and 63 respondents has been interviewed following the sample size estimation of Nurul Islam (2011). Findings of this study revealed that, there is a statistically significant difference between some socio-demographic dimensions (like; Age, Family type, Education and Income) and climate change perception. Furthermore, no statistically significant relationship found between Gender, Religion, Savings and climate c...","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72852476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Comparison of Acute Toxicity (96h) of Copper (CuSO4) in Cyprinus Carpio and Rutilus Rutilus","authors":"M. Farhangi, H. Jafaryan","doi":"10.5539/ep.v8n2p21","DOIUrl":"https://doi.org/10.5539/ep.v8n2p21","url":null,"abstract":"The experiments were conducted to study of the acute toxicity of Cyprinus carpio and Rutilus rutilus by added copper salt in basins. 13 fishes with average weight of 2±0.5g to Rutilus rutilus and 20±2.2g Cyprinus carpio were exposed to different concentrations of copper salt respectively. \u0000 \u0000The experiments were done by Static Method during 96 hours. A group of fish was considered as control samples. The different concentrations of copper such as 0, 0.1, and 0.2, 0.3, 0.4, 0.45 and 5mgL-1 were used to Rutilus rutilus and Cyprinus carpio fishes. Under stable condition (TOC and pH), the lethal concentration of copper was measured of 0.4mgL-1 and 0.45mgL-1 to Rutilus rutilus and Cyprinus carpio respectively during of 96 hours. The results indicated the significant differences were observed between treatments of fish with each other and also with the control samples. \u0000 \u0000With increasing of copper in each treatment, the mortality rate of fish significantly was increased. Histopathological findings showed that major lesions were hemorrhage, hyperemia, hyperplasia and epithelial cells necrosis in total fish. Also in the lesion fish were observed degenerated tubules of their kidney, expansion of Bowman's capsule and hepatocytes necrosis.","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73884354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Influence of Social Interaction Learning Model, Learning Motivation, Social Attitude on the Student Learning Result of Geographic Subject in Public Senior High Schools in Aceh Province","authors":"T. Sahudra, M. Murniati, Deny Setiawan, Alamsyah Taher","doi":"10.5539/ep.v8n2p41","DOIUrl":"https://doi.org/10.5539/ep.v8n2p41","url":null,"abstract":"Purpose – The aim of this research is to test the difference of sudents learning outcome of Geographic subject taught with social inquiry learning model, social simulation and students’ social investigation, social behavior, learning motivation of SMA in Aceh Province. \u0000 \u0000Design/methodology/approach – The research methodology employed in his research was quasi-experimental with the design using a Non-equivalent Control Group Design method. The experimental class and the control of this research are selected randomly. The subject of this research is ninth grade student of public SMA in Aceh Province, Indonesia. Based on the early observation that the researcher conducts, total public SMA in Aceh is 344 schools. This study took 3 (three) study group of every SMA to be managed as a research subject, which was a class taught using a group investigation, social inquiry, and social simulation learning method. Data analysis technique is inferential analysis intended to test the research hypothesis conducted by using varians analysis technique (ANAVA). \u0000 \u0000Findings – The findings that there are no differences in student learning outcomes of Geography subject taught with social inquiry learning models (A1), social simulation learning models (A2) and group investigative learning models (A3). There are differences in the learning outcome of geography subject and different social attitude, which is a high social attitude (B1) and social attitude (B2). There is an interaction between the learning model (A), social attitudes (B) and learning motivation (C). There is an interaction between learning models (A) and social attitudes (B). There is an interaction between learning model (A) and learning motivation (C). There is an interaction between learning model (A) and learning motivation (C). \u0000 \u0000Originality/value – The research on the application of social interaction learning model to improve learning motivation, social attitude, and students learning outcome at the geographic subject of SMA in Aceh Province, Indonesia.","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77411415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Environmental Impact of Sturgeon Pen Culture on Diversity and Spatial Distribution Patterns of the Benthic Macro Fauna Communities in Gorgan Bay","authors":"Farhangi Mohammad, Hosseini Seyyed Abbas, Jafaryan Hojatollah, Ghorbani Rasoul, Harsij Mohammad, S. Mohammad","doi":"10.5539/ep.v8n2p31","DOIUrl":"https://doi.org/10.5539/ep.v8n2p31","url":null,"abstract":"Community structure and biodiversity of benthic macro fauna in around pen culture of Sturgeon fish in Gorgan Bay were studied for period of one year from August 2015 to July 2016. Seasonal samplings were carried out at 5 stations in 3 transects. In addition, depth (D), water temperature (Toc), dissolved oxygen (DO); pH, total dissolved solid (TDS), biological oxygen demand (BOD5), chemical oxygen demand (COD), phosphorus (PO4-3), nitrite (NO2-) and total ammonia (NH3+) were measured in each station. Results of season variations of Physico – chemical factors of water showed that, there were no significant differences between PO4-3 (p>0.05). However, there were significant differences between BOD5, COD, NO2-, NH3+ and TDS (p<0.05). Totally, 11 genus's and 10 families belong to 3 phyla as Mollusks, Arthropods and Annelids were identified. The results showed, there were the maximum abundance percent belong to Hydrobiidae and Cochliopidae with 33.83% and 26.25% and the minimum abundance percent belong to Gammaridae with 0.05% respectively. However, the maximum abundance belongs to Pyrgohydrobia sp., from Hydrobiidae with 3410 n/m2. The results showed, there were the maximum and minimum abundance percent in autumn and spring with 1.07 and 0.88 % respectively. The results of distance-based redundancy analysis (db.-RDA) revealed that environmental factors such as depth, DO and TDS are all important in determining the distribution of macro benthic species in Gorgan Gulf. However, there were significant differences between abundance, species number (S), diversity (as Shannon–Wiener’s, H´), species richness (as Margalef’s, D), and evenness (as Pielou’s, J) (p<0.05). There were the most diversity species in 2 and 5 stations.","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75715877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production and Characterization of Rice Husk Biosorbent from Far North Cameroon","authors":"Elie Kolwa Doboy, H. Z. Adjia, R. Kamga","doi":"10.5539/ep.v8n2p1","DOIUrl":"https://doi.org/10.5539/ep.v8n2p1","url":null,"abstract":"The objective of this study is the production and the characterization of rice husk biosorbent. In fact, the biosorbent has been obtained by phosphoric acid treatment; its physicochemicals characteristics such as point of zero charge, specific surface, iodine number and chemicals functions have been determined. The analysis indicaded that, the point of zero charge is 8.7; for the pH value less than 8.7, the biosorbent surface is posotively charged and for pH value higher than 8.7, the biosorbent surface is negatively charged. The biosorbent iodine number is 1560.87±1 mg/g, it means that, the biosorbent is constituted in majority of microspores. Furthermore, the specific surface of biosorbent is 104.45±1m2/g, it is five times as big than untreated rice husk obtained by Dada and al., (2012). Acid treatment improve the porosity of biosorbent. Infrarouge spectrum present ether and aromatic functions.","PeriodicalId":11724,"journal":{"name":"Environment and Pollution","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91464144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}