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171.
Shreemoyee Bordoloi Manoranjan Nath Robin K. Dutta 《Process Safety and Environmental Protection》2013,91(5):405-414
The effects of some commonly used pH conditioners, viz., lime, banana ash, the carbonate and the bicarbonate of sodium and potassium and their binary mixture, on simultaneous removal of arsenic and iron ions from water have been studied. KHCO3 has been found to be the most suitable pH conditioner for the purpose. About 80 mg/L KHCO3 can remove both arsenate and iron ions from initial 250 μg/L and 20 mg/L to below their respective guideline values of the WHO for drinking water, retaining the final pH in the acceptable range for drinking. The simultaneous removal of arsenate and iron by the pH-conditioners decreases in the order: Lime > KHCO3 > NaHCO3 > K2CO3 > Na2CO3 > ash. However, lime requires post-treatment correction of highly alkaline pH. The arsenate ion is removed predominantly through goethite or ferrihydrite in the presence of the bicarbonates and through ferric hydroxide in the presence of the more alkaline pH-conditioners. KHCO3 is more advantageous over the more basic substances including NaHCO3, because with it, one not only needs the smallest dose but also can avoid careful adjustment of the dose for regulating the initial and the final pH. The paper clearly demonstrates the potential of KHCO3 to substitute the currently used pH-conditioners, viz., ash, lime and NaHCO3 for simultaneous removal of arsenate and iron ions. 相似文献
172.
Karnatak Gunjan Das Basanta Kumar Sarkar Uttam Kumar Borah Simanku Roy Aparna Parida Pranay Lianthuamluaia Lianthuamluaia Das Archan Kanti Behera Bijay Kumar Pandit Arun Sahoo Amiya Kumar Bhattacharjya Birendra Kumar Chakraborty Sangeeta Mondal Kausik Chandra Purna 《Environmental science and pollution research international》2022,29(50):75431-75440
Environmental Science and Pollution Research - The rapid degradation, overexploitation, and encroachment of floodplain wetlands have led to considerable decline in fish diversity and production... 相似文献
173.
Islam Md. Rezaul Rahman Md. Mominur Ahasan Md. Tanjimul Sarkar Nadia Akash Shopnil Islam Mahfuzul Islam Fahadul Aktar Most. Nazmin Saeed Mohd Harun-Or-Rashid Md. Hosain Md. Kawsar Rahaman Md. Saidur Afroz Sadia Bibi Shabana Rahman Md. Habibur Sweilam Sherouk Hussein 《Environmental science and pollution research international》2022,29(46):69341-69366
Environmental Science and Pollution Research - The emergence of various diseases during the COVID-19 pandemic made health workers more attentive, and one of the new pathogens is the black fungus... 相似文献
174.
Dispersion of odour: a case study with a municipal solid waste landfill site in North London,United Kingdom 总被引:2,自引:0,他引:2
Municipal solid waste (MSW) landfills are a potential source of offensive odours that can create annoyance within communities. Dispersion modelling was used to quantify the potential odour strength causing an impact on the community around a particular MSW landfill site north of the London area in the United Kingdom. The case studies were completed with the short-term mode of COMPLEX-I, software developed by the US-EPA. The year 1998 was chosen as a source of baseline data. It was observed that by 2004, when the landfill will progress towards the west and a big band of the area towards the north would be partly/fully restored, the maximum contribution of the new sources giving higher odour concentrations would be in the southwesterly regions away from the landfill. Concentrations as high as 25.0 ou(E)/m(3) were observed with 3 min averaging time in the southwesterly areas as compared to concentrations of 20.0 ou(E)/m(3) at 10 min averaging times. However, the percentage frequency of such critical events occurring would be low. All other surrounding farms and small villages would be exposed to the concentration of 3.0 ou(E)/m(3) on certain occasions. In the year 2008, the majority of the filling fronts would be filled with wastes with no contributions from the active and operational cells. The maximum odour concentration around the landfill site for 1 h averaging time would be approximately 3 ou(E)/m(3) about 1.0 km north and 500 m west of the landfill site. For 3 min averaging time, the stretch of 5 ou(E)/m(3) band would be up to 2.5 km towards the north of the landfill site. It is argued that further analysis of the model calculations considering effects of wind direction, frequency of wind direction, stability of the atmosphere, selected odour threshold, integration time of the model, etc. would form a basis for calculating the separation distances of the landfill site from the surrounding community. 相似文献
175.
Sarkar Saptarshy Gill Sukhbir Singh Das Gupta Ghanshyam Kumar Verma Sant 《Environmental science and pollution research international》2022,29(36):53934-53953
Environmental Science and Pollution Research - Water is an essential moiety for the human use since a long time. Availability of good-quality water is very essential, as it is used in almost all... 相似文献
176.
Sarkar Biplab Islam Aznarul 《Environmental science and pollution research international》2022,29(18):26575-26598
Environmental Science and Pollution Research - The present study exhibits a critical outlook on the poverty and livelihood vulnerability of the fisherman community in the context of persistent... 相似文献
177.
Bera Tanushree Kumar Vikash Sarkar Dhruba Jyoti Devi Manoharmayum Shaya Behera Bijay Kumar Das Basanta Kumar 《Environmental science and pollution research international》2022,29(45):67801-67820
Environmental Science and Pollution Research - East Kolkata Wetland (EKW) is one of the largest sewage-fed wetlands in the world, which support the livelihood of thousands of peoples. However, at... 相似文献
178.
Sharma Rachit Kumar Raju Geo Sarkar Prabir Singh Harpreet Singla Ekta 《Environment, Development and Sustainability》2022,24(10):12446-12466
Environment, Development and Sustainability - A medicine can be administered in varied dosage forms which are having different environmental impacts. Two dosage forms of paracetamol (tablet and... 相似文献