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Geospeciation of arsenic using MINTEQA2 for a post-mining lake

Sari, S. A. and Ujang, Zaini and Ahmad, U. K. (2006) Geospeciation of arsenic using MINTEQA2 for a post-mining lake. Water Science and Technology , 54 (11-12). pp. 289-299. ISSN 1606-9749

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Official URL: http://dx.doi.org/10.2166/wst.2006.894

Abstract

The objective of this study was to investigate the cycling of arsenic in the water column of a post-mining lake. This study is part of a research project to develop health risk assessment for the surrounding population. Inductively Coupled Plasma-Mass Spectrophotometer (ICP-MS) and Capillary Electrophoresis (CE) have been used to analyze the total amount and speciation, respectively. A computer program, called MINTEQA2, which was developed by the United States Environmental Protection Agency (USEPA) was used for predicting arsenic, iron, and manganese as functions of pH and solubility. Studying the pH values and cycle of arsenic shows that the percentage of bound arsenate, As(V) species in the form of HAsO-4 increases with range pH from 5 to 7, as well as Fe(ll) and Mn(ll). As expected phases of arsenic oxides are FeAsO4 and Mn3(AsO4), as a function of solubility, however none of these phases are over saturated and not precipitated. It means that the phases of arsenic oxides have a high solubility.

Item Type:Article
Uncontrolled Keywords:Cycling of arsenic, MINTEQA2, pH, post-mining lake water, solubility
Subjects:Q Science > Q Science (General)
Divisions:Science
ID Code:7502
Deposited By: Nur Amal Zakiah Shamsudin
Deposited On:06 Jan 2009 08:48
Last Modified:01 Jun 2010 15:52

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