Pub Date : 2019-03-27DOI: 10.2174/2212717806666181212125216
Manjari Srivastav, Meenal Gupta, S. Agrahari, Pawan Detwal
Per capita average annual freshwater availability is gradually reduced due to increasing population, urbanization and affluent lifestyles. Hence, management of wastewater is of great concern. The wastewater from different industries can be treated by various conventional treatment methods but these conventional treatment technologies seem to be ineffective for the complete removal of pollutants especially refractory organic compounds that are not readily biodegradable in nature. Detergents, detergent additives, sequestering agents like EDTA, Pesticides, Polycyclic aromatic hydrocarbons, etc. are some of the recalcitrant organic compounds found in the wastewater. One of the treatment technologies for the removal of recalcitrant organic compounds is Advanced Oxidation Process (AOP). The production of hydroxyl free radical is the main mechanism for the AOP. AOP is a promising technology for the treatment of refractory organic compounds due to its low oxidation selectivity and high reactivity of the radical. Hydrogen peroxide (H2O2), Ozonation, Ultra-violet (UV) radiation, H2O2/UV process and Fenton’s reaction are extensively used for the removal of refractory organic compounds thus reducing Chemical Oxygen Demand (COD), Total Organic Carbon (TOC), phenolic compounds, dyes etc. to great extent. From the studies, we found that Fenton’s reagents appear to be most economically practical AOP systems for almost all industries with respect to high pollutant removal efficiency and it is also economical. From the energy point of view, the ozone based process proves to be more efficient but it is costlier than the Fenton’s process.
{"title":"Removal of Refractory Organic Compounds from Wastewater by Various Advanced Oxidation Process - A Review","authors":"Manjari Srivastav, Meenal Gupta, S. Agrahari, Pawan Detwal","doi":"10.2174/2212717806666181212125216","DOIUrl":"https://doi.org/10.2174/2212717806666181212125216","url":null,"abstract":"\u0000\u0000Per capita average annual freshwater availability is gradually reduced due to increasing\u0000population, urbanization and affluent lifestyles. Hence, management of wastewater\u0000is of great concern. The wastewater from different industries can be treated by various conventional\u0000treatment methods but these conventional treatment technologies seem to be ineffective\u0000for the complete removal of pollutants especially refractory organic compounds that\u0000are not readily biodegradable in nature. Detergents, detergent additives, sequestering agents\u0000like EDTA, Pesticides, Polycyclic aromatic hydrocarbons, etc. are some of the recalcitrant\u0000organic compounds found in the wastewater. One of the treatment technologies for the removal\u0000of recalcitrant organic compounds is Advanced Oxidation Process (AOP). The production\u0000of hydroxyl free radical is the main mechanism for the AOP. AOP is a promising\u0000technology for the treatment of refractory organic compounds due to its low oxidation selectivity\u0000and high reactivity of the radical. Hydrogen peroxide (H2O2), Ozonation, Ultra-violet\u0000(UV) radiation, H2O2/UV process and Fenton’s reaction are extensively used for the removal\u0000of refractory organic compounds thus reducing Chemical Oxygen Demand (COD), Total\u0000Organic Carbon (TOC), phenolic compounds, dyes etc. to great extent. From the studies, we\u0000found that Fenton’s reagents appear to be most economically practical AOP systems for almost\u0000all industries with respect to high pollutant removal efficiency and it is also economical.\u0000From the energy point of view, the ozone based process proves to be more efficient but\u0000it is costlier than the Fenton’s process.\u0000","PeriodicalId":10876,"journal":{"name":"Current Environmental Engineering","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85826615","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}
Pub Date : 2019-03-27DOI: 10.2174/2212717806666181218141807
Vincent Habumugisha, Khaldoon A Mourad, Léonidas Hashakimana
Background: Trees often affect the chemical properties of soil, positively or negatively. This paper studied the effects of Podocarpus falcatus and Markhamia lutea trees on soil chemistry in Ruhande Arboretum, Rwanda. Soil samples were collected using Zigzag method from Arboretum forest of Ruhande at different depths (0-20, 20-40 and 40-60 cm). For each plot, 25 samples were collected to make one composite sample per plot for each depth. The results showed that tree species contributed to the changes of soil chemistry along the depths of the soil layers. The laboratory analyses showed that there was a high significant influence of tree species on soil pH and Aluminum ions. However, it was observed that there was no significant influence of Podocarpus falcatus and Markhamia lutea species on the available phosphorus or on the total exchangeable acidity. On the other hand, analyzing soil samples under Markhamia lutea showed an increase in the total nitrogen and a decrease in the pH and available phosphorus. Trees affect the chemical properties of soils. Therefore, it is recommended that under acidic soils, for example, forestry and agroforestry actors should use less acidifying tree species, such as Markhamia lutea and Podocarpus falcatus.
{"title":"The Effects of Trees on Soil Chemistry","authors":"Vincent Habumugisha, Khaldoon A Mourad, Léonidas Hashakimana","doi":"10.2174/2212717806666181218141807","DOIUrl":"https://doi.org/10.2174/2212717806666181218141807","url":null,"abstract":"\u0000\u0000Background: Trees often affect the chemical properties of soil, positively or\u0000negatively.\u0000\u0000\u0000\u0000 This paper studied the effects of Podocarpus falcatus and Markhamia lutea trees\u0000on soil chemistry in Ruhande Arboretum, Rwanda.\u0000\u0000\u0000\u0000 Soil samples were collected using Zigzag method from Arboretum forest of Ruhande\u0000at different depths (0-20, 20-40 and 40-60 cm). For each plot, 25 samples were collected\u0000to make one composite sample per plot for each depth.\u0000\u0000\u0000\u0000 The results showed that tree species contributed to the changes of soil chemistry\u0000along the depths of the soil layers. The laboratory analyses showed that there was a high\u0000significant influence of tree species on soil pH and Aluminum ions. However, it was observed\u0000that there was no significant influence of Podocarpus falcatus and Markhamia lutea\u0000species on the available phosphorus or on the total exchangeable acidity. On the other hand,\u0000analyzing soil samples under Markhamia lutea showed an increase in the total nitrogen and a\u0000decrease in the pH and available phosphorus.\u0000\u0000\u0000\u0000 Trees affect the chemical properties of soils. Therefore, it is recommended that\u0000under acidic soils, for example, forestry and agroforestry actors should use less acidifying\u0000tree species, such as Markhamia lutea and Podocarpus falcatus.\u0000","PeriodicalId":10876,"journal":{"name":"Current Environmental Engineering","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86254068","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}
Pub Date : 2018-12-13DOI: 10.2174/2212717805666180718130032
Debojyoti Mazumdar, Sanjukta Subudhi, P. Mishra, G. S. Rani, B.L.A. Prabhavathi Devi, R. Prasad, M. Kumar, Rajeev K Sukumaran, Ashok Pandey, Sankar Rao, B. Lal
{"title":"Nutrient Removal From Spent Effluent of Sorghum Biomass Pretreatment by Novel Chlorella Strain: Dual Potential for Spent Effluent Treatment and in Biofuel Application","authors":"Debojyoti Mazumdar, Sanjukta Subudhi, P. Mishra, G. S. Rani, B.L.A. Prabhavathi Devi, R. Prasad, M. Kumar, Rajeev K Sukumaran, Ashok Pandey, Sankar Rao, B. Lal","doi":"10.2174/2212717805666180718130032","DOIUrl":"https://doi.org/10.2174/2212717805666180718130032","url":null,"abstract":"","PeriodicalId":10876,"journal":{"name":"Current Environmental Engineering","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87892708","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}
Pub Date : 2018-12-13DOI: 10.2174/2212717805666180919115232
Fabiola Marisol Morales Morales, Yuri Oh, J. M. Park
{"title":"Optimizing Lipid Accumulation Content by Cryptococcus curvatus Using Response Surface Methodology and Molasses as Sole Carbon Source","authors":"Fabiola Marisol Morales Morales, Yuri Oh, J. M. Park","doi":"10.2174/2212717805666180919115232","DOIUrl":"https://doi.org/10.2174/2212717805666180919115232","url":null,"abstract":"","PeriodicalId":10876,"journal":{"name":"Current Environmental Engineering","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74532091","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}
Pub Date : 2018-11-30DOI: 10.2174/2212717805666181009101510
Mohamed Attia Sheradah, A. El-Sikaily, Nabila El Sayed Abdel Maguid, Nehad M. Abd El-Moneam, M. G. Zaki
{"title":"Polychlorinated Biphenyls (PCBs) and Pesticides in Sediments and Siganus rivulatus from Two Areas Along the Egyptian Mediterranean Coast","authors":"Mohamed Attia Sheradah, A. El-Sikaily, Nabila El Sayed Abdel Maguid, Nehad M. Abd El-Moneam, M. G. Zaki","doi":"10.2174/2212717805666181009101510","DOIUrl":"https://doi.org/10.2174/2212717805666181009101510","url":null,"abstract":"","PeriodicalId":10876,"journal":{"name":"Current Environmental Engineering","volume":"272 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79643436","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}
Pub Date : 2018-11-30DOI: 10.2174/2212717805666180809094826
A. Zahrim, Y. Lija, I. Azreen, N. Hilal
This item is brought to you by Swansea University. Any person downloading material is agreeing to abide by the terms of the repository licence. Copies of full text items may be used or reproduced in any format or medium, without prior permission for personal research or study, educational or non-commercial purposes only. The copyright for any work remains with the original author unless otherwise specified. The full-text must not be sold in any format or medium without the formal permission of the copyright holder.
{"title":"Adsorption of Ammonia Nitrogen by using Jackfruit (Artocarpus heterophyllus) Seeds: Batch and Fixed-bed Column Studies","authors":"A. Zahrim, Y. Lija, I. Azreen, N. Hilal","doi":"10.2174/2212717805666180809094826","DOIUrl":"https://doi.org/10.2174/2212717805666180809094826","url":null,"abstract":"This item is brought to you by Swansea University. Any person downloading material is agreeing to abide by the terms of the repository licence. Copies of full text items may be used or reproduced in any format or medium, without prior permission for personal research or study, educational or non-commercial purposes only. The copyright for any work remains with the original author unless otherwise specified. The full-text must not be sold in any format or medium without the formal permission of the copyright holder.","PeriodicalId":10876,"journal":{"name":"Current Environmental Engineering","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76371469","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}
Pub Date : 2018-11-30DOI: 10.2174/2212717805666180801143324
Swati Sharma, Rashmi Sharma, A. Sharma
{"title":"Photo-Catalytic and Kinetic Study of Zinc Oxide Catalyzed Degradation of Copper Stearate Surfactants for Sustainable Development of Environment","authors":"Swati Sharma, Rashmi Sharma, A. Sharma","doi":"10.2174/2212717805666180801143324","DOIUrl":"https://doi.org/10.2174/2212717805666180801143324","url":null,"abstract":"","PeriodicalId":10876,"journal":{"name":"Current Environmental Engineering","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89782433","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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