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- Soil treatment (3)
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- Soil washing; Soapnut; Phosphate; Sapindus mukorossi; Arsenic (1)
- Soil washing; Soapnut; Sapindus mukorossi; Arsenic; CGAs; Microbubbles (1)
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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
Application Of Colloidal Gas Aphron Suspensions Produced From Sapindus Mukorossi For Arsenic Removal From Contaminated Soil, Soumyadeep Mukhopadhyay Dr, Sumona Mukherjee Ms, Mohd Ali Hashim Dr, Bhaskar Sen Gupta Dr
Application Of Colloidal Gas Aphron Suspensions Produced From Sapindus Mukorossi For Arsenic Removal From Contaminated Soil, Soumyadeep Mukhopadhyay Dr, Sumona Mukherjee Ms, Mohd Ali Hashim Dr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
Colloidal gas aphron dispersions (CGAs) can be described as a system of microbubbles suspended homogenously in a liquid matrix. This work examines the performance of CGAs in comparison to surfactant solutions for washing low levels of arsenic from an iron rich soil. Sodium Dodecyl Sulfate (SDS) and saponin, a biodegradable surfactant, obtained from Sapindus mukorossi or soapnut fruit were used for generating CGAs and solutions for soil washing. Column washing experiments were performed in down-flow and up flow modes at a soil pH of 5 and 6 using varying concentration of SDS and soapnut solutions as well as CGAs. Soapnut …
A Comparative Study Of Biopolymers And Alum In The Separation And Recovery Of Pulp Fibres From Paper Mill Effluent By Flocculation, Sumona Mukherjee Ms, Soumyadeep Mukhopadhyay Dr, Agamuthu Pariatamby Dr, Mohd Ali Hashim Dr, Jaya N. Sahu Dr, Bhaskar Sen Gupta Dr
A Comparative Study Of Biopolymers And Alum In The Separation And Recovery Of Pulp Fibres From Paper Mill Effluent By Flocculation, Sumona Mukherjee Ms, Soumyadeep Mukhopadhyay Dr, Agamuthu Pariatamby Dr, Mohd Ali Hashim Dr, Jaya N. Sahu Dr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
Recovery of cellulose fibres from paper mill effluent has been studied using common polysaccharides or biopolymers such as Guar gum, Xanthan gum and Locust bean gum as flocculent. Guar gum is commonly used in sizing paper and routinely used in paper making. The results have been compared with the performance of alum, which is a common coagulant and a key ingredient of the paper industry. Guar gum recovered about 3.86 mg/L of fibre and was most effective among the biopolymers. Settling velocity distribution curves demonstrated that Guar gum was able to settle the fibres faster than the other biopolymers; however, …
Arsenic Removal From Soil With High Iron Content Using A Natural Surfactant And Phosphate, Soumyadeep Mukhopadhyay Dr, Mohd Ali Hashim Dr, Matthew Allen Mr, Bhaskar Sen Gupta Dr
Arsenic Removal From Soil With High Iron Content Using A Natural Surfactant And Phosphate, Soumyadeep Mukhopadhyay Dr, Mohd Ali Hashim Dr, Matthew Allen Mr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
An environment friendly arsenic removal technique from contaminated soil with high iron content has been studied. A natural surfactant extracted from soapnut fruit, phosphate solution and their mixture was used separately as extractants. The mixture was most effective in desorbing arsenic, attaining above 70 % efficiency in the pH range of 4–5. Desorption kinetics followed Elovich model. Micellar solubilization by soapnut and arsenic exchange mechanism by phosphate are the probable mechanisms behind arsenic desorption. Sequential extraction reveals that the mixed soapnut–phosphate system is effective in desorbing arsenic associated with amphoteric–Fe-oxide forms. No chemical change to the wash solutions was observed …
Contemporary Environmental Issues Of Landfill Leachate: Assessment & Remedies, Sumona Mukherjee Ms, Soumyadeep Mukhopadhyay Dr, Mohd Ali Hashim Dr, Bhaskar Sen Gupta Dr
Contemporary Environmental Issues Of Landfill Leachate: Assessment & Remedies, Sumona Mukherjee Ms, Soumyadeep Mukhopadhyay Dr, Mohd Ali Hashim Dr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
Landfills are the primary option for waste disposal all over the world. Most of the landfill sites across the world are old and are not engineered to prevent contamination of the underlying soil and groundwater by the toxic leachate. The pollutants from landfill leachate have accumulative and detrimental effect on the ecology and food chains leading to carcinogenic effects, acute toxicity and genotoxicity among human beings. Management of this highly toxic leachate presents a challenging problem to the regulatory authorities who have set specific regulations regarding maximum limits of contaminants in treated leachate prior to disposal into the environment to …
Applications Of Colloidal Gas Aphrons For Pollution Remediation, Mohd Ali Hashim Dr, Soumyadeep Mukhopadhyay Dr, Jaya Narayan Sahu Dr, Bhaskar Sen Gupta Dr
Applications Of Colloidal Gas Aphrons For Pollution Remediation, Mohd Ali Hashim Dr, Soumyadeep Mukhopadhyay Dr, Jaya Narayan Sahu Dr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
Colloidal gas aphrons (CGAs), first described by Felix Sebba in his book "Foams and Biliquid Foams - Aphrons" in 1987, consist of a system of spherical microbubbles with diameter mostly above 25 μm and classified as kugelschaums (ball foam). They possess some colloidal properties and can be pumped at uniform rate through pipes and channels, much like liquids. Also, they have high stability due to very small size and thick surfactant shells. Research works published over the period of the past two decades indicate effective applications of CGAs for clarification of particles and microorganisms, protein separation, gas and nutrient transfer …
Remediation Technologies For Heavy Metal Contaminated Groundwater, Mohd Ali Hashim Dr, Soumyadeep Mukhopadhyay Dr, Jaya Narayan Sahu Dr, Bhaskar Sen Gupta Dr
Remediation Technologies For Heavy Metal Contaminated Groundwater, Mohd Ali Hashim Dr, Soumyadeep Mukhopadhyay Dr, Jaya Narayan Sahu Dr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
The contamination of groundwater by heavy metal, originating either from natural soil sources or from anthropogenic sources is a matter of utmost concern to the public health. Remediation of contaminated groundwater is of highest priority since billions of people all over the world use it for drinking purpose. In this paper, thirty five approaches for groundwater treatment have been reviewed and classified under three large categories viz chemical, biochemical/biological/biosorption and physico-chemical treatment processes. Comparison tables have been provided at the end of each process for a better understanding of each category. Selection of a suitable technology for contamination remediation at …
A Simple Chemical Free Arsenic Removal Method For Community Water Supply – A Case Study From West Bengal, India, Bhaskar Sen Gupta Dr, U Rott Dr, Amitava Bandopadhyay Dr, W Degroot Dr, N K. Nag Dr, Angel Carbonell-Barrachina Dr, Soumyadeep Mukhopadhyay Dr
A Simple Chemical Free Arsenic Removal Method For Community Water Supply – A Case Study From West Bengal, India, Bhaskar Sen Gupta Dr, U Rott Dr, Amitava Bandopadhyay Dr, W Degroot Dr, N K. Nag Dr, Angel Carbonell-Barrachina Dr, Soumyadeep Mukhopadhyay Dr
Soumyadeep Mukhopadhyay Dr
This report describes a simple chemical free method that was successfully used by a team of European and Indian scientists (www.qub.ac.uk/tipot) to remove arsenic (As) from groundwater in a village in West Bengal, India. Six such plants are now in operation and are being used to supply water to the local population (www.insituarsenic.org). The study was conducted in Kasimpore, a village in North 24 Parganas District, approximately 25 km from Kolkata. In all cases, total As in treated water was less than the WHO guideline value of 10 mg/L. The plant produces no sludge and the operation cost is 1.0 …