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Removal of arsenic from drinking water by chemical precipitation - a modeling and simulation study of the physical-chemical processes

Lookup NU author(s): Dr Zia Shaikh

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Abstract

A dynamic mathematical model was developed for removal of arsenic from drinking water by chemical coagulation-precipitation and was validated experimentally in a bench-scale set-up. While examining arsenic removal efficiency of the scheme under different operating conditions, coagulant dose, pH and degree of oxidation were foun d to have pronounced impact. Removal efficiency of 91-92% was achieved for synthetic feed water spiked with 1 mg/L arsenic and pre-oxidized by potassium permanganate at optimum pH and coagulant dose. Model predictions corroborated well with the experimental findings (the overall correlation coefficient being 0.9895) indicating the capability of the model in predicting performance of such a treatment plant under different operating conditions. Menu-driven, user-friendly Visual Basic software developed in the study will be very handy in quick performance analysis. The simulation is expected to be very useful in full-scale design and operation of the treatment plants for removal of arsenic from drinking water.

Publication metadata

Author(s): Pal P, Z Ahammad Sk, Pattanayak A, Bhattacharya P

Publication type: Article

Publication status: Published

Journal: Water Environment Research

Year: 2007

Volume: 79

Issue: 4

Pages: 357-366

ISSN (print): 1061-4303

ISSN (electronic): 1554-7531

Publisher: Water Environment Federation

URL: http://dx.doi.org/10.2175/106143006X111754

DOI: 10.2175/106143006X111754

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