{"title":"Assessment of the Water Quality of the Radika River in the National Park Mavrovo in the Republic of Macedonia","authors":"K. Pavlov, R. Bojkovska, G. Pavlovski","doi":"10.5963/ijep0801001","DOIUrl":"https://doi.org/10.5963/ijep0801001","url":null,"abstract":"","PeriodicalId":250722,"journal":{"name":"International Journal of Environmental Protection","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128953841","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}
N. Touch, H. Takata, Manaka Okabe, Y. Morimoto, T. Hibino
{"title":"Granulated Coal Ash-Used Filter Design for Efficient Removal of Nutrient Salts","authors":"N. Touch, H. Takata, Manaka Okabe, Y. Morimoto, T. Hibino","doi":"10.5963/IJEP0801004","DOIUrl":"https://doi.org/10.5963/IJEP0801004","url":null,"abstract":"","PeriodicalId":250722,"journal":{"name":"International Journal of Environmental Protection","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124133141","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}
S. Tongu, R. Sha’Ato, J. Okonkwo, O. Olukunle, I. Eneji, Terrumun T. Tor-Anyiin
Polybrominated diphenyl ethers (PBDEs) have been recognised as persistent organic pollutants (POPs) and are also among chemicals classified as endocrine-disrupting compounds (EDCs) which interfere with the endocrine system and disrupt the physiological function of hormones in animals and humans alike. This study determined the concentrations of six PBDE congeners (BDE 47, BDE 99, BDE 100, BDE 153, BDE 154 and BDE 183) in water and sediment samples from River Benue, in the Makurdi Metropolitan Area in North Central Nigeria using gas chromatogragh – mass spectrometer. These congeners are components of the pentaand octaBDE formulations that have been banned by the European Union. The samples were collected from the River, bimonthly, for one year across dry and wet seasons. All the congeners considered were found to be present in both water and sediment. The levels of Σ6PBDEs in water ranged from 0.02 – 0.11 ngL _1 during dry season and 0.10 – 0.76 ngL during wet season while the concentrations in sediment during dry and wet seasons ranged from 4.65 – 26.74 ngg and 4.40 – 17.15 ngg respectively. The percentage recoveries from solid phase and Soxhlet extractions ranged from 68 – 111 % and 71 – 109 % respectively. It was concluded that the presence of all the congeners in both water and sediment coupled with their established environmental persistence and bioaccumulation posed a pollution risk to the river which requires further monitoring and preventive measures to be taken. KeywordsGas chromatograph – mass spectrometer; polybrominated diphenyl ethers; sediment; river water; Nigeria
{"title":"Baseline Levels of Polybrominated Diphenyl Ethers (PBDEs) in Water and Sediment from River Benue, North Central Nigeria","authors":"S. Tongu, R. Sha’Ato, J. Okonkwo, O. Olukunle, I. Eneji, Terrumun T. Tor-Anyiin","doi":"10.5963/IJEP0801002","DOIUrl":"https://doi.org/10.5963/IJEP0801002","url":null,"abstract":"Polybrominated diphenyl ethers (PBDEs) have been recognised as persistent organic pollutants (POPs) and are also among chemicals classified as endocrine-disrupting compounds (EDCs) which interfere with the endocrine system and disrupt the physiological function of hormones in animals and humans alike. This study determined the concentrations of six PBDE congeners (BDE 47, BDE 99, BDE 100, BDE 153, BDE 154 and BDE 183) in water and sediment samples from River Benue, in the Makurdi Metropolitan Area in North Central Nigeria using gas chromatogragh – mass spectrometer. These congeners are components of the pentaand octaBDE formulations that have been banned by the European Union. The samples were collected from the River, bimonthly, for one year across dry and wet seasons. All the congeners considered were found to be present in both water and sediment. The levels of Σ6PBDEs in water ranged from 0.02 – 0.11 ngL _1 during dry season and 0.10 – 0.76 ngL during wet season while the concentrations in sediment during dry and wet seasons ranged from 4.65 – 26.74 ngg and 4.40 – 17.15 ngg respectively. The percentage recoveries from solid phase and Soxhlet extractions ranged from 68 – 111 % and 71 – 109 % respectively. It was concluded that the presence of all the congeners in both water and sediment coupled with their established environmental persistence and bioaccumulation posed a pollution risk to the river which requires further monitoring and preventive measures to be taken. KeywordsGas chromatograph – mass spectrometer; polybrominated diphenyl ethers; sediment; river water; Nigeria","PeriodicalId":250722,"journal":{"name":"International Journal of Environmental Protection","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115710913","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}
N. Touch, S. Yamaji, K. Nagama, T. Miyatsu, T. Hibino
{"title":"Improvement of Sediment and Water Quality with Solar Cell-Combined Sediment Microbial Fuel Cells in Oyster Farms","authors":"N. Touch, S. Yamaji, K. Nagama, T. Miyatsu, T. Hibino","doi":"10.5963/ijep0801005","DOIUrl":"https://doi.org/10.5963/ijep0801005","url":null,"abstract":"","PeriodicalId":250722,"journal":{"name":"International Journal of Environmental Protection","volume":"52 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115605303","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}
N. Touch, S. Yamaji, Kaichi Nishimura, Y. Sunada, T. Hibino
It has been reported that solar cell-combined sediment microbial fuel cell (SC-SMFC) can be an alternative option for remediating sediment. Near a sewage outlet, huge amount of sediment accumulation causes many environmental problems, such as malodor and the restriction of benthos inhabitation. This study aims to employ SC-SMFC for remediating sediment deposited near a sewage outlet. Particularly, we aim to determine the remediation range of sediment from the anode of SC-SMFC. SC-SMFC was applied into the sediment deposited on the riverbank of a tidal river, and the distribution of sediment quality from the anode was examined at 14 weeks after the employment of SC-SMFC. Decreases in hydrogen sulfide, phosphate, manganese, and ammonium ion concentrations were found, indicating the sediment remediation owing the SC-SMFC application. A larger decrease in each ion concentration was found near the anode. From the ion distributions, the sediment located between 0 and 1 m from the anode was strongly influenced by the SC-SMFC application, which was approximately 6.7-fold longer than that obtained from the laboratory experiment. At in-situ, water current that can transport substances to the anode and the biodiversity of microorganisms that can produce much of electrons may partly contribute to the increasing SC-SMFC performance, leading to the long range of sediment remediation. Furthermore, it is newly found out that ammonium and manganese ions are efficiently removed from sediment via the anode oxidation during the SC-SMFC application. KeywordsSolar Cell; Sediment Microbial Fuel Cell; Sediment Quality; Remediation Range; Hydrogen Sulfide, Ammonium
{"title":"Remediation of Sediment Deposited near Sewage Outlet with Solar Cell-Combined Sediment Microbial Fuel Cells","authors":"N. Touch, S. Yamaji, Kaichi Nishimura, Y. Sunada, T. Hibino","doi":"10.5963/IJEP0801003","DOIUrl":"https://doi.org/10.5963/IJEP0801003","url":null,"abstract":"It has been reported that solar cell-combined sediment microbial fuel cell (SC-SMFC) can be an alternative option for remediating sediment. Near a sewage outlet, huge amount of sediment accumulation causes many environmental problems, such as malodor and the restriction of benthos inhabitation. This study aims to employ SC-SMFC for remediating sediment deposited near a sewage outlet. Particularly, we aim to determine the remediation range of sediment from the anode of SC-SMFC. SC-SMFC was applied into the sediment deposited on the riverbank of a tidal river, and the distribution of sediment quality from the anode was examined at 14 weeks after the employment of SC-SMFC. Decreases in hydrogen sulfide, phosphate, manganese, and ammonium ion concentrations were found, indicating the sediment remediation owing the SC-SMFC application. A larger decrease in each ion concentration was found near the anode. From the ion distributions, the sediment located between 0 and 1 m from the anode was strongly influenced by the SC-SMFC application, which was approximately 6.7-fold longer than that obtained from the laboratory experiment. At in-situ, water current that can transport substances to the anode and the biodiversity of microorganisms that can produce much of electrons may partly contribute to the increasing SC-SMFC performance, leading to the long range of sediment remediation. Furthermore, it is newly found out that ammonium and manganese ions are efficiently removed from sediment via the anode oxidation during the SC-SMFC application. KeywordsSolar Cell; Sediment Microbial Fuel Cell; Sediment Quality; Remediation Range; Hydrogen Sulfide, Ammonium","PeriodicalId":250722,"journal":{"name":"International Journal of Environmental Protection","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121636220","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}
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