Copper and zinc removal from acid mine drainage using calcareous sandstone

Law, Yen Foong (2005) Copper and zinc removal from acid mine drainage using calcareous sandstone. Universiti Malaysia Sabah. (Unpublished)

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Abstract

The removal of heavy metals (i.e. Cu and Zn) from AMD using calcareous sandstone (CSS) was investigated. Batch experiments were conducted at different contact time (i.e. 1, 2, 3, 4, 5, 6 and 24 hours) and different AMD (i.e. AMD PI and AMD P2), and the final pH and concentrations of Cu and Zn were determined. A neutralization experiment using NaOH was also carried out to evaluate the effect of pH on metal removal. The results showed that the removal of Cu and Zn by CSS was highly efficient. However, the overall percentage removal depended on contact time, type of metal and AMD. Percentage removal of metal increased with contact time and equilibrium was attained within 24 hours. The pH of the AMD-CSS mixture also showed simultaneous increase from pH 3.0 to pH > 7.0. Comparatively, percentage of metal removal and magnitude of pH increase were lower for AMD P2 compared with AMD Pl. In all cases percentage removal of Cu is greater than Zn. The removal of Cu and Zn from the AMD was attributed to chemisorption and precipitation mechanisms.

Item Type: Academic Exercise
Uncontrolled Keywords: Acid Mine Drainage, metal removal, wastewater, technology, adsorption process,
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Q Science > QD Chemistry
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 03 Sep 2013 02:45
Last Modified: 23 Oct 2017 07:58
URI: http://eprints.ums.edu.my/id/eprint/6852

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