NDLI: Purification, characterization and application of dual coagulants containing chitosan and different Al species in coagulation and ultrafiltration process.

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Purification, characterization and application of dual coagulants containing chitosan and different Al species in coagulation and ultrafiltration process.

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Purification, characterization and application of dual coagulants containing chitosan and different Al species in coagulation and ultrafiltration process.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wang, Wenyu Zhao, Shuang Yue, Qinyan Gao, Baoyu Song, Wen Feng, Lijuan
Description	Author Affiliation: Wang W ( Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China. Electronic address: sduwenyuwang@foxmail.com.); Zhao S ( Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.); Yue Q ( Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China. Electronic address: qyyue58@aliyun.com.); Gao B ( Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.); Song W ( Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.); Feng L ( Key Laboratory of Inorganic Chemistry in Universities of Shandong, Department of Chemistry and Chemical Engineering, Jining University, Shandong 273155, China.)
Abstract	The objective of this study was to investigate the effect of different Al species and chitosan (CS) dosages on coagulation performance, floc characteristics (floc sizes, strength and regrowth ability and fractal dimension) and membrane resistance in a coagulation-ultrafiltration hybrid process. Results showed that different Al species combined with humic acid in diverse ways. Al had better removal efficiency, as determined by UV and dissolved organic carbon, which could be further improved by the addition of CS. In addition, the optimal dosage of different Al species was determined to be 4.0mg/L with the CS concentration of 1.0mg/L, by orthogonal coagulation experiments. Combining Al /Al /Al with CS resulted in larger flocs, higher recovery, and higher fractal dimension values corresponding to denser flocs; in particular, the floc size at the steady state stage was four times larger than that obtained with Al species coagulants alone. The results of ultrafiltration experiments indicated that the external fouling percentage was significantly higher than that of internal fouling, at around 85% and 15%, respectively. In addition, the total membrane resistance was significantly decreased due to CS addition.
File Format	HTM / HTML
ISSN	10010742
Journal	Journal of Environmental Sciences
Volume Number	51
Language	English
Publisher	Elsevier
Publisher Date	2017-01-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Aluminum Chemistry Chitosan Water Pollutants, Chemical Water Purification Analysis Humic Substances Ultrafiltration Journal Article
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Medicine Environmental Engineering

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