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231222s2003 xx ||||| 00| ||eng c |
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|a pubmed25n0421.xml
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|a DE-627
|b ger
|c DE-627
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|a eng
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|a Veeken, A H M
|e verfasserin
|4 aut
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|a Innovative developments in the selective removal and reuse of heavy metals from wastewaters
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|c 2003
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|b nc
|2 rdacarrier
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|a Date Completed 17.10.2003
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|a Date Revised 19.11.2009
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|a published: Print
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|a Citation Status MEDLINE
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|a Sulphide precipitation of heavy metal containing wastewaters results in low effluent concentrations. However, sulphide precipitation is not widely applied in practice because the dosing of sulphide cannot adequately be controlled. A new process was developed where the combination of a sulphide-selective electrode (pS-electrode) and pH electrode controls the sulphide addition. Precipitation experiments were performed on a laboratory-scale in batch and continuous reactor systems with synthetic wastewaters containing Cd, Cu, Ni, Pb or Zn. The response of the pS-electrode during precipitation was unique for each heavy metal and was directly related to the solubility product of the corresponding metal sulphide. The metals were removed to levels < 0.05 mg l(-1) at pH 6.0 by sulphide precipitation while maintaining a total sulphide concentration < 0.02 mg l(-1). By the control of pS at different levels and keeping the pH constant at 6.0, the metals in solutions of both Cu and Zn could be precipitated selectively from solution in a batch and continuous reactors. The use of a membrane reactor in combination with control of pH and pS offers a simple, cheap, efficient and sustainable technique with respect to obtaining very low effluent concentrations and selective removal of metals as pure metal sulphides which can be reused
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Metals, Heavy
|2 NLM
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|a Sulfides
|2 NLM
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|a Water Pollutants
|2 NLM
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|a Rulkens, W H
|e verfasserin
|4 aut
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 47(2003), 10 vom: 28., Seite 9-16
|w (DE-627)NLM098149431
|x 0273-1223
|7 nnas
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| 773 |
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|g volume:47
|g year:2003
|g number:10
|g day:28
|g pages:9-16
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|a AR
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|d 47
|j 2003
|e 10
|b 28
|h 9-16
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