Relationship between the physicochemical properties of sludge-based carbons and the adsorption capacity of dissolved organic matter in advanced wastewater treatment: Effects of chemical conditioning

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	Relationship between the physicochemical properties of sludge-based carbons and the adsorption capacity of dissolved organic matter in advanced wastewater treatment: Effects of chemical conditioning
	Li, Lanfeng; Ai, Jing; Zhang, Weijun; Peng, Sainan; Dong, Tianyi; Deng, Yun; Cui, Yanping; Wang, Dongsheng
刊名	CHEMOSPHERE
	2020-03
卷号	243 页码:1-7
关键词	Sludge-based carbons Pyrolysis Chemical conditioning Adsorption DOMs fractionation
ISSN号	0045-6535
英文摘要	Pyrolysis carbonisation is a promising technology to convert organic waste into valuable carbon-based materials. However, sludge is generally highly compressible and difficult to dewater because of its high concentrations of biopolymers; the bound water of sludge is trapped in a network composed of biopolymers. Therefore, chemical conditioning is an indispensable step for improving sludge dewaterability performance. In the present work, the effects of different chemical conditioning agents (polymeric aluminium chloride (PACI), iron(III) chloride (FeCl3), KMnO4 -Fe(II) and Fenton's reagent) on the physicochemical properties of sludge-based carbons (SBCs) were systematically studied and the SBCs were further used in advanced wastewater treatment. The adsorption mechanisms of dissolved organic matters (DOMs) by different SBCs were also investigated. The results showed that conditioning with KMnO4-Fe(II) and Fenton's reagent improved the specific surface area of the SBCs, whereas inorganic salt flocculation conditioning reduced the porosity of the SBCs. In addition, we found that the Fenton-SBC and Mn/Fe-SBC performed better than the other investigated SBCs in the removal of organic compounds from secondary effluent and that the pseudo-second-order kinetic model could better describe the process of DOMs adsorption by all of the investigated SBCs. Moreover, three-dimensional fluorescence excitation-emission matrix spectroscopy in combination with an analysis of the physical and chemical fractionation of DOMs showed that all of the SBCs performed well in the adsorption of aromatic substances, hydrophobic acids and hydrophobic neutrals, whereas the Mn/Fe-SBC and Fenton-SBC per- formed better than the other SBCs in the removal of weakly hydrophobic acids. (C) 2019 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44985]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Li, Lanfeng,Ai, Jing,Zhang, Weijun,et al. Relationship between the physicochemical properties of sludge-based carbons and the adsorption capacity of dissolved organic matter in advanced wastewater treatment: Effects of chemical conditioning[J]. CHEMOSPHERE,2020,243:1-7.
APA	Li, Lanfeng.,Ai, Jing.,Zhang, Weijun.,Peng, Sainan.,Dong, Tianyi.,...&Wang, Dongsheng.(2020).Relationship between the physicochemical properties of sludge-based carbons and the adsorption capacity of dissolved organic matter in advanced wastewater treatment: Effects of chemical conditioning.CHEMOSPHERE,243,1-7.
MLA	Li, Lanfeng,et al."Relationship between the physicochemical properties of sludge-based carbons and the adsorption capacity of dissolved organic matter in advanced wastewater treatment: Effects of chemical conditioning".CHEMOSPHERE 243(2020):1-7.