Leonardite-derived humic substances are great adsorbents for cadmium

doi:10.1007/s11356-017-9947-8

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Leonardite-derived humic substances are great adsorbents for cadmium
	Meng, Fande 1,2; Yuan, Guodong3 ; Wei, Jing 1; Bi, Dongxue 1,2; Wang, Hailong 4; Yuan, Guodong(Zhaoqing Univ, Zhaoqing 526061, Guangdong, Peoples R China)
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2017-10-01
卷号	24 期号:29 页码:23006-23014
关键词	Humic Substances Cd Adsorption Soil Remediation Leonardite Ftir Immobilization
ISSN号	0944-1344
DOI	10.1007/s11356-017-9947-8
产权排序	第1完成单位
文献子类	Article
英文摘要	Adsorption is an important mechanism to immobilize cadmium (Cd) in soil, for which humic substances have a potential. However, commercial humic substances are either very acidic (pH = 2) or alkaline/Na+-enriched, making them less suitable for use in acid and saline soils. Here, we used leonardite to produce humic adsorbents HA (pH = 4.02), Ca-HA (pH = 10.9), and Ca-CPAM-HA (pH = 9.62) by using HCl, CaCl2, or CaCl2-polyacrylamide as a flocculant. Their elemental compositions, acidity, and spectroscopic properties were determined, and their Cd adsorption characteristics were assessed by batch kinetic and thermodynamic experiments at environmentally relevant concentrations. Further, HA was mixed with Cd-contaminated soils and incubated for a month to assess its effect on Cd immobilization. Good fitting of kinetic adsorption data into pseudo-second-order model, together with FTIR spectroscopic data, suggested the chemisorption mechanism by forming Cd(II)-carboxyl complexes. The maximum adsorption capacity derived from the Langmuir equation was 129, 114, and 110 mg Cd(II)/g for HA, Ca-HA, and Ca-CPAM-HA, respectively. These values are almost the same on carbon-normalized basis. HA reduced acetic acid extractable Cd by 31% or more. Besides their high propensity for Cd adsorption, humic adsorbents are inexpensive, safe, and beneficial to soil quality.
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WOS关键词	AQUEOUS-SOLUTIONS ; HEAVY-METALS ; CONTAMINATED SOILS ; SEQUENTIAL EXTRACTION ; ADSORPTION ; CD(II) ; SORPTION ; REMOVAL ; BIOCHAR ; PB(II)
WOS研究方向	Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000412453500022
资助机构	Chinese National Key Research and Development Program(2016YFD0200303) ; Dongguan Municipal Government(2014607101003) ; Key Research and Development Program of Shandong Province(2016CYJS05A01-1)
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/23447]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室烟台海岸带研究所_近岸生态与环境实验室烟台海岸带研究所_污染过程与控制实验室
通讯作者	Yuan, Guodong; Yuan, Guodong(Zhaoqing Univ, Zhaoqing 526061, Guangdong, Peoples R China)
作者单位	1.Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res YIC, Shandong Prov Key Lab Coastal Environm Proc,YIC, Yantai 264003, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Zhaoqing Univ, Zhaoqing 526061, Guangdong, Peoples R China 4.Guangdong Dazhong Agr Sci Co Ltd, Hongmei Town 523169, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Meng, Fande,Yuan, Guodong,Wei, Jing,et al. Leonardite-derived humic substances are great adsorbents for cadmium[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2017,24(29):23006-23014.
APA	Meng, Fande,Yuan, Guodong,Wei, Jing,Bi, Dongxue,Wang, Hailong,&Yuan, Guodong.(2017).Leonardite-derived humic substances are great adsorbents for cadmium.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,24(29),23006-23014.
MLA	Meng, Fande,et al."Leonardite-derived humic substances are great adsorbents for cadmium".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 24.29(2017):23006-23014.