Ball-milled biochar for galaxolide removal: Sorption performance and governing mechanisms

doi:10.1016/j.scitotenv.2019.01.005

	Ball-milled biochar for galaxolide removal: Sorption performance and governing mechanisms
	Zhang, Qianru 3; Wang, Jianmei 2,3; Lyu, Honghong 1,3; Zhao, Qing 3; Jiang, Lisi 2,3; Liu, Li 3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-04-01
卷号	659 页码:1537-1545
关键词	Ball mill Biochar Galaxolide Sorption
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.01.005
英文摘要	The environmental risk of galaxolide (HHCB) spurs the need to develop efficient and economical removal technology. Although sorption is one of the best removal approaches, studies on sorption of HHCB by biochar were limited. With the purpose of combining the advantages of ball-milling and sorption technologies, six ball-milled biochars (BM-biochars) varied with biomasses and pyrolysis temperature were produced, characterized, and tested for HHCB removal from aqueous solution. At an initial HHCB concentration of 2 mg L-1, the unmilled and BM-biochars adsorbed 330-746 and 609-2098 mg kg(-1) of HHCB, respectively. The increase in sorption capacities (about 3-fold increase) was mainly ascribed to the increase in BM-biochar's external and internal surface area, pore volume and pore size, and the exposure of the graphitic structure. The removal of HHCB by the BM-biochars increased with increasing pyrolysis temperature. For lower temperature biochar (300 degrees C wheat straw biochar, WS300), hydrophobic partitioning played a major role in HHCB sorption onto unmilled biochar (log K-oc/log K-ow value of WS300 was 0.772 at a C-e of 1 mg L-1). Ball milling reduced the hydrophobicity of 300 degrees C biochar, which diminished the HHCB sorption. However, increased surface area, pore volume, pore size, and graphitic structure provided additional sorption sites, resulting in enhanced HHCB uptake (log K-oc/log K-ow value of BMWS300 was 1.23 at a C-e of 1 mg L-1). For higher temperature biochars (500 and 700 degrees C), ball milling mainly enhanced HHCB sorption onto high temperature biochars via surface adsorption, p-p interaction, and pore filling. For WS500, 77.9% of HHCB removal was due to surface adsorption. Ball milling increased this percentage to 96.7% for BMWS500. This work highlighted the potential of ball milling as an excellent engineering method to improve biochar's sorption properties. (c) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[31470552] ; National Natural Science Foundation of China[31670516] ; National Key Research and Development Program of China[2018YFC1800704]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000457293700146
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123899]
专题	中国科学院沈阳应用生态研究所
通讯作者	Zhang, Qianru
作者单位	1.Hebei Univ Technol, Sch Energy & Environm Engn, Tianjin 300401, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Pollut Ecol & Environm Engn, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qianru,Wang, Jianmei,Lyu, Honghong,et al. Ball-milled biochar for galaxolide removal: Sorption performance and governing mechanisms[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,659:1537-1545.
APA	Zhang, Qianru,Wang, Jianmei,Lyu, Honghong,Zhao, Qing,Jiang, Lisi,&Liu, Li.(2019).Ball-milled biochar for galaxolide removal: Sorption performance and governing mechanisms.SCIENCE OF THE TOTAL ENVIRONMENT,659,1537-1545.
MLA	Zhang, Qianru,et al."Ball-milled biochar for galaxolide removal: Sorption performance and governing mechanisms".SCIENCE OF THE TOTAL ENVIRONMENT 659(2019):1537-1545.