Page 80 - 2016地大报告-电子书

2016

or 1/3. For environmental parameters, there was a negative effect of increasing the solution

pH and dissolved oxygen on Cr(VI) removal. Furthermore, a mechanistic analysis revealed
that Cr(VI) reduction occurred predominantly at the solid-liquid interface, and that Fe(II)

regenerated from FeS@Fe-0 corrosion may account for 52% of the Cr(VI) reduction, while
electrons from Fe-0 and FeS account for the rest. After treatment, Cr(VI) was completely

transformed and immobilized as solid Fe-Cr hydroxide precipitates, thus avoiding secondary
contamination. The FeS@Fe-0 hybrid material has a better potential for treating Cr(VI)-

bearing wastewater than nano Fe-0. (C) 2016 Elsevier Ltd. All rights reserved.
论文连接：https://doi.org/10.1016/j.watres.2016.06.009

18. Enhancement of waste activated sludge dewaterability using calcium peroxide
pre-oxidation and chemical re-flocculation

作 者：Chen, Z (Chen, Zhan)；Zhang, WJ ( 张 伟 军 ) [ 1] ；Wang, DS (Wang,
[ 3 ]
Dongsheng) [ 1,2 ] ; Ma, T ( 马腾 ) [ 1 ] ; Bai, RY (Bai, Runying) ; Yu, DZ (Yu, Dezhong) [ 4 ]

WATER RESEARCH 卷 : 103 页 : 170-181 出版年 : OCT 15 2016

摘 要：The effects of combined calcium peroxide (CaO2) oxidation with chemical re-
flocculation on dewatering performance and physicochemical propertiesof waste activated

sludge was investigated in this study. The evolutions of extracellular polymeric substances
(EPS) distribution, composition and morphological properties were analyzed to unravel

the sludge conditioning mechanism. It was found that sludge filtration performance was

enhanced by calcium peroxide oxidation with the optimal dosage of 20 mg/gTSS. However,

this enhancement was not observed at lower dosages due to the absence of oxidation and the

performance deteriorated at higher dosages because of the release of excess EPS, mainly as

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