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zjjlimin

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[交流] 表面电荷怎么测定

表面电荷怎么测定?是那种自己滴定的那种
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fenjine

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zjjlimin: 金币+1 2012-11-28 10:04:18
楼主要测啥的表面电荷?给个测活性污泥表面电荷密度的吧。
The measurement of surface charge of the sludge flocs was performed by colloidal titration [21]. A known volume of sludge sample diluted in distilled water was reacted with an excess amount of polybrene (Polyscience Inc.) (0.001N), followed by back-titration with polyvinyl sulphate (Aldrich–Fluka) (0.001N) to a colorimetric end-point indicated by Toluidin Blue. The surface charge was expressed as milliequivalents per gram of mixed liquor suspended solids of positive or negative colloidal charge, i.e. meq./g MLSS. The standard deviations for triplicate samples were 3–10%.
引自:Bo Jin, Britt-Marie Wilén, Paul Lant.A comprehensive insight into floc characteristics and their impact on compressibility and settleability of activated sludge.J. Chemical Engineering Journal 95 (2003) 221-234
3楼2012-10-31 23:32:48
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congda

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zjjlimin: 金币+1 2012-11-28 10:04:30
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5楼2012-11-02 08:55:00
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tjzxd

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6楼: Originally posted by songweidea at 2012-11-02 09:16:39
测电流吧!

有具体的测量和计算公式吗
8楼2013-01-16 16:06:25
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lucifer1990

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5楼: Originally posted by congda at 2012-11-02 08:55:00
采用zeta电位仪,或者电泳仪

我想请问下,同样表面积的铜与铂电极,分别接触带有相同电荷的物质,得到的信号不同,是由于两种金属的导电率不同引起的,还是介电常数不同引起的哪?
9楼2013-05-22 15:44:07
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