Determination of Trace Nickel in the Fu-Yang River by PAN Spectrophotometry

Zhou, Jihong; Lian, Yanjun

doi:10.1109/icbbe.2008.382

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2013

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“…The coagulation was carried out with rapid mixing about 500 rpm for 1min, slow mixing at 100 rpm for 10 min, and followed by a settling period of 30 min. Samples of the treated water were collected at a depth of 2~3 cm below the surface, and they were analyzed for residual COD Cr concentration with self-prepared digestion solution [ 7 ] -spectrophotometry method. And the decolorization of dyes was demonstrated by the change of absorbance at wavelength maximum in wastewater before and after treatment [8] .…”

Section: Flocculation Experimentsmentioning

confidence: 99%

A Study on the Preparation and Flocculation Properties of Boracic Poly-Aluminum-Ferric-Silicate

Tian

Han

Zhang

et al. 2013

AMR

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The boracic poly-aluminum-ferric-silicate (B-PSAF) coagulant was prepared by water solution co-polymerization method, which was synthesized from sodium silicate, aluminum sulfate, ferric chloride and sodium borate. In addition, the best molar ratio of boron and silicon was determined by single factor process. The micro-morphology and structure of B-PSAF were studied by scanning electronic microscope (SEM) and Fourier transform infrared spectrum (FT-IR). It has been studied the operation of B-PSAF as the flocculating agent, the dosage and its effects on the flocculability. Experiments show that B-PSAF is a good effective flocculant, which can be used to treat alkaline dyeing wastewater and it has the features of less consumption, rapid coagulation and high removal rate of CODCr.

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Section: Flocculation Experimentsmentioning

confidence: 99%