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Abstract

Integrated Approach to Remove Iron, Arsenic, and Manganese from Water Using Manganese Greensand and Other Adsorbent

Author(s): Ananta Saikia, Gaurav Agnihotri, Prasanta K Raul, Saumen Banerjee and Sanjai K Dwivedi

An efficient system has been designed and developed to study the removal of some heavy metals like Fe(II), As(III) and Mn(II) from water considering effect of competing ions. The integrated approach to remove contaminants from water successfully proved at filtration rate 300 Lhr-1. Sand was coated with ferrous sulphate and used as principal adsorbent. The batch adsorber was designed with different compartment containing limestone, iron fillings, coated sand, manganese greensand and granular activated charcoal as filtration media and removal efficiency of iron, arsenic and manganese was monitored. The system showed the removal of Fe(II), As(III) and Mn(II) up to 0.3 mgL-1, 10 µgL-1 and 0.03 mgL-1, respectively from initial spiked water having 30 mgL-1 (iron), 1400 µgL-1 (arsenic), and 5 mgL-1 (manganese), with pH range of 6.8 to 8.2. It was found that removal of heavy metals from water is not pronouncedly effected in the presence of competing ions.


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