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环境学院发展报告

loose, floc strength is relatively lower. Scanning environmental microscope analysis revealed

that sludge flocs conditioned by Al-b and Al-c (especially PAC(2.5) and Al-13) exhibited
obvious botryoidal structure, this is because sludge flocs formed by Al-b and Al-c were more

compact and floc strength is high, it was easy generated plentiful tiny channels for water
release. In addition, polymeric aluminum salt coagulant (Al-b, Al-c) had better performance in

compressing extracellular polymeric substances (EPS) structure and removing sticky protein-
like substances from soluble EPS fraction, contributing to improvement of sludge filtration

performance. Therefore, this study provides a novel solution for improving sludge dewatering
property by controllingaluminum speciation. (C) 2016 Elsevier Ltd. All rights reserved.

论文链接：https://doi.org/10.1016/j.watres.2016.09.016

17. Reductive sequestration of chromate by hierarchical FeS@Fe-0 particles

作 者：Du, JK ( 杜江坤，博士生 )

[ 1 ] ; Bao, JG ( 鲍建国 ) [ 1 ] ; Lu, CH (Lu,

Chenghang) [ 1 ] ; Werner, D (Werner, David)

[ 2 ]

WATER RESEARCH 卷 : 102

页 : 73-81 出版年 : OCT 1 2016

摘 要：Nanoscale Fe-0 (nFe(0))

can detoxify Cr(VI)-bearing wastewater and groundwater, but rapid passivation is a
negative factor for large-scale remediation applications. In this study, a magnetic FeS@

Fe-0 hybrid material was fabricated by immobilization of iron sulfide (FeS) onto Fe-
0particles to improve the Cr(VI) removal capacity. The solid characterization confirmed that

Fe-0 particles were encapsulated by amorphous iron monosulfide. The Cr(VI) uptake by FeS@
Fe-0 hybrid particles was found to follow pseudo second-order rate kinetics, and the

Langmuir isotherm was most appropriate to describe Cr(VI) sorption. Meanwhile, the FeS@
Fe-0 hybrid particles showed a much higher efficiency towards Cr(VI)sequestration compared

to individual nFe(0). Moreover, the results of batch experiments with various adsorbent doses
indicated that the reactivity ofFeS@Fe-0 varies with different FeS-to-Fe-0 molar ratios.

The reaction rate constants for Cr(VI) removal first increased with an increasing FeS-to-
Fe-0 ratio from 0/1 to 1/9, and then decreased for the FeS-to-Fe-0 ratio increased further 1/5

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