Weakly basic anion exchangers exhibit a unique selectivity for adsorption of heavy metals such as mercury, copper, lead, zinc, nickel and cadmium. Furthermore, some types of exchangers show a marked preference for chromate over sulphate anions. Application of the respective ion exchange processes may, therefore, offer a promising way to remove traces of hazardous heavy metals very efficiently from the raw water of drinking water supplies. The respective ion exchange processes have been demonstrated both at laboratory and semi-technical scales for the elimination of heavy metal cations (cadmium, mercury, lead, nickel) and of chromate anions from spiked tap water and contaminated groundwaters. In all cases the effluent concentrations of filters could be decreased well below the parametric values of the European Drinking Water Directive.
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May 01 2002
Elimination of trace heavy metals from drinking water by means of weakly basic anion exchangers
Wolfgang H. Höll
;
Wolfgang H. Höll
1
Christian Bartosch Forschungszentrum Karlsruhe, Institute for Technical Chemistry, Section WGT, P.O. Box 3640, D-76021 Karlsruhe, Germany
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Xuan Zhao
;
Xuan Zhao
2
Tsinghua University, Institute of Nuclear Energy Technology, 100084 Beijing, P.R. China
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Shijun He
Shijun He
2
Tsinghua University, Institute of Nuclear Energy Technology, 100084 Beijing, P.R. China
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Journal of Water Supply: Research and Technology-Aqua (2002) 51 (3): 165-172.
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Wolfgang H. Höll, Xuan Zhao, Shijun He; Elimination of trace heavy metals from drinking water by means of weakly basic anion exchangers. Journal of Water Supply: Research and Technology-Aqua 1 May 2002; 51 (3): 165–172. doi: https://doi.org/10.2166/aqua.2002.0014
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Wolfgang H. Höll, Xuan Zhao, Shijun He; Elimination of trace heavy metals from drinking water by means of weakly basic anion exchangers. Journal of Water Supply: Research and Technology-Aqua 1 May 2002; 51 (3): 165–172. doi: https://doi.org/10.2166/aqua.2002.0014
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