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231223s2006 xx ||||| 00| ||eng c |
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|a (NLM)17165465
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|a DE-627
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|c DE-627
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|a eng
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|a Miska, V
|e verfasserin
|4 aut
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|a Behaviour of heavy metals during tertiary bio-filtration
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|c 2006
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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 21.02.2007
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|a Date Revised 17.09.2019
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|a published: Print
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|a Citation Status MEDLINE
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|a More stringent water quality parameters in the Annex of the Water Framework Directive 2000/60/EC led to the introduction of "Maximum Tolerable Risk concentrations" (MTR-values) in the national legislation in The Netherlands (Vierde Nota Waterhuishouding). The MTR-values give limitations for the concentrations of e.g. heavy metals (HM's) but also for nutrients: Ntot < 2.2 mg/l, Ptot <0.15 mg/l. Investigations of HM removal during denitrifying flocculation filtration are conducted on the effluent of a typical modern Dutch WWTP. Because of low concentrations of HM's in the feed water, a cocktail of copper, nickel and zinc chloride (approximately equal 150-200 microg/l) is dosed before filtration. Preliminary jar tests and filtration tests with media filtration in pilot-scale and lab-scale are conducted. The results show high removal of nickel and zinc during jar tests with dosing of powdered activated carbon. During filtration tests at pilot-scale the bounded fraction of copper and zinc is highly removed. All three HM's are removed in the lab-scale activated carbon filter. After dosing, nickel is found mainly in the dissolved form, but it is removed in the lab-scale activated carbon filter. The removal of HM's via adsorption subsequently leads to a discussion on the toxicity of HM's and their bio-availability
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|a Journal Article
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|a Metals, Heavy
|2 NLM
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|a Gorter, K
|e verfasserin
|4 aut
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|a Menkveld, H W H
|e verfasserin
|4 aut
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|a Neef, R
|e verfasserin
|4 aut
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|a van der Graaf, J H J M
|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 54(2006), 10 vom: 20., Seite 209-16
|w (DE-627)NLM098149431
|x 0273-1223
|7 nnns
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| 773 |
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|g volume:54
|g year:2006
|g number:10
|g day:20
|g pages:209-16
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|d 54
|j 2006
|e 10
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|h 209-16
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