Simultaneous removal of nano-ZnO and Zn2+ based on transportation character of nano-ZnO by coagulation: Enteromorpha polysaccharide compound polyaluminum chloride
Simultaneous removal of nano-ZnO and Zn2+ based on transportation character of nano-ZnO by coagulation: Enteromorpha polysaccharide compound polyaluminum chloride
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基于纳米ZnO混凝输送特性同时去除纳米ZnO和Zn2：浒苔多糖复合聚合氯化铝
DOI：
10.1007/s11356-016-7116-0
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发表时间：
2017-02
影响因子：
5.8
通讯作者：
Siqi Liu
中科院分区：
文献类型：
--
作者：
Jianzhang Sun;Baoyu Gao;Shuang Zhao;Ruihua Li;Qinyan Yue;Yan Wang;Siqi Liu
纳米氧化锌（nZnO）对环境有影响，被认为是重金属污染物。采用混凝法同时去除纳米颗粒和重金属是一项新技术。本文系统地研究了ZnO在水中的环境化学行为，如释放金属离子的分散、聚集、沉降和溶解等。结果表明：压实沉淀态、悬浮态和释放态的nZnO含量分别为36.54%、40.61%和22.86%；将浒苔多糖（Ep）与聚合氯化铝（PAC）联合用于地表水净化。为了研究同时去除残余的nZnO颗粒和Zn2+的机理，本研究进一步采用混凝法。系统研究了Ep对絮凝体粒径、强度、回收能力及分形结构的影响。结果表明，PAC-Ep对nZnO和Zn2+的去除率达95%以上，对天然有机质（NOM）的去除率达50 ~ 60%，对溶解重金属离子的吸附-螯合去除率达35%。Ep是一种有效的混凝剂，能提高混凝性能，生成粒径更大、生长速度更快、回收率更高的絮凝体。PAC- ep形成的絮凝体结构比PAC形成的絮凝体松散得多。图片摘要ᅟ。
It is confirmed that nano-ZnO (nZnO) has impact on environment and is considered as heavy metal pollutants. It is a new technology that applies coagulation process to simultaneous removal of the nanoparticles and heavy metals. Environmental chemical behavior of ZnO in water, such as the dispersion, aggregation, sedimentation, and dissolution of releasing metal ions, has been systematically studied in this paper. The result shows that three kinds of nZnO state such as compacted sediment, suspended, and released is separately 36.54 %, 40.61 %, and 22.86 %. Enteromorpha polysaccharide (Ep) was used together with polyaluminum chloride (PAC) in surface water purification. In order to study the mechanism of simultaneous removal of residual nZnO particles and Zn2+, coagulation process was further applied in this study. The evolution of flocs size, strength, and recovery ability and fractal structure due to Ep addition was systematically studied in this paper. Results indicated that PAC-Ep was efficient in removing nZnO and Zn2+, which leads to more than 95 % particles, 50-60 % natural organic matter (NOM) removed, and 35 % of resolved heavy metal ion adsorbing-chelation. Ep was an efficient coagulant aid in enhancing performance of coagulation and generating flocs with bigger sizes, faster growth rates, and higher recovery abilities. Additionally, the flocs formed by PAC-Ep presented a much looser structure than flocs formed only by PAC. Graphical abstract ᅟ.
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影响因子：
8.6
作者：
Zhao, Y. X.;Gao, B. Y.;Wang, Y.
通讯作者：
Wang, Y.
各种混凝机制下絮体尺寸、强度和结构的表征
影响因子：
5.2
作者：
Li, Tao;Zhu, Zhe;Tang, Hongxiao
通讯作者：
Tang, Hongxiao
影响因子：
11.4
作者：
Lecoanet, HF;Bottero, JY;Wiesner, MR
通讯作者：
Wiesner, MR
影响因子：
11.4
作者：
Dhawan, Alok;Taurozzi, Julian S.;Tarabara, Volodymyr V.
通讯作者：
Tarabara, Volodymyr V.
影响因子：
11.4
作者：
Z. Chowdhury;G. Amy;R. Bales
通讯作者：
Z. Chowdhury;G. Amy;R. Bales