Comparison of Heavy Metal Removal From Chemically Interactive and Non-Interactive Solid Phases by The CEHIXM Process

Document Type

Article

Publication Date

2014

Publication Title

Separation Science and Technology

Abstract

A laboratory study was conducted to compare the removal of heavy metals from chemically interactive and non-interactive solid phases using coupled electric-hydraulic gradient assisted by ion exchange medium (CEHIXM) process. The removal of primarily four heavy metals Pb, Cd, Zn, and Mn from the contaminated sources was investigated. Experiments were conducted at a constant electric field of 50 V DC for both the solid phases and with constant hydraulic flow-rates of 10 cm3/min for chemically non-interactive solid phase and 4 cm3/min for chemically interactive solid phase. As much as 93% of Pb, 97% of Cd, 98% of Zn, and 94% of Mn were removed after 100 hours of the processing from chemically non-interactive solid phase. About 72% of Pb, 85% of Cd, 81% of Zn, and 77% of Mn were removed after 100 hours of the processing and about 90% of Pb, 96% of Cd, 93% of Zn, and 91% of Mn were removed after 200 hours of the processing from chemically interactive solid phase. Metal removal percentage was always higher for chemically non-interactive solid phase than that of chemically interactive solid phase. Chemically interactive solid phase required prolonged experiment duration to achieve compatible metal removal. The two solid phases did not follow quite the same order of metal removal. The order of removal was Zn > Cd > Mn > Pb for chemically non-interactive solid phase and Cd > Zn > Mn > Pb for chemically interactive solid phase.

DOI

10.1080/01496395.2014.894523

Volume

49

Issue

10

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