Arsenite Removal from Drinking Water using Naturally available Laterite in Sri Lanka | Zendy

R. M. S. C. Ranasinghe | Zendy; D. R. I. B. Werellagama | Zendy; Rohan Weerasooriya | Zendy

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Arsenite Removal from Drinking Water using Naturally available Laterite in Sri Lanka

Author(s) -

R. M. S. C. Ranasinghe,

D. R. I. B. Werellagama,

Rohan Weerasooriya

Publication year - 2014

Publication title -

engineer journal of the institution of engineers sri lanka

Language(s) - English

Resource type - Journals

eISSN - 2550-3219

pISSN - 1800-1122

DOI - 10.4038/engineer.v47i2.6865

Subject(s) - sri lanka , laterite , institution , section (typography) , checklist , library science , engineering , geography , geology , environmental planning , computer science , sociology , social science , nickel , paleontology , materials science , metallurgy , tanzania , operating system

Arsenite, As(III) is the most soluble form of arsenic species. Arsenic removal efficiency by laterite (commonly found in Sri Lanka) was examined as a function of pH, initial arsenite concentration, laterite dosage, contact time and mixing rate. More than 90% arsenite removal could be achieved within 5 minutes when pH is around 10. By treating the water at this pH range, the current USEPA standard for arsenic in drinking water (10 ppb) can be maintained when the arsenite / laterite ratio is less than 10(µg/g). Results of the study showed that naturally available laterite in Sri Lanka can be used as an effective adsorbent to treat arsenic contaminated water. ENGINEER, Vol. 47, No. 02, pp. 23-31, 2014

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