Leonardite-derived humic substances are great adsorbents for cadmium

doi:10.1007/s11356-017-9947-8

	Leonardite-derived humic substances are great adsorbents for cadmium
	Meng, Fande 1,2; Yuan, Guodong3 ; Wei, Jing1 ; Bi, Dongxue 1,2; Wang, Hailong 4; Yuan, Guodong(Zhaoqing Univ, Zhaoqing 526061, Guangdong, Peoples R China)
发表期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN	0944-1344
	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
研究领域	Environmental Sciences
DOI	10.1007/s11356-017-9947-8
产权排序	第1完成单位
作者部门	海岸带环境过程实验室
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.
文章类型	Article
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)
收录类别	SCI
语种	英语
关键词[WOS]	AQUEOUS-SOLUTIONS ; HEAVY-METALS ; CONTAMINATED SOILS ; SEQUENTIAL EXTRACTION ; ADSORPTION ; CD(II) ; SORPTION ; REMOVAL ; BIOCHAR ; PB(II)
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:000412453500022
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/23447
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室中国科学院海岸带环境过程与生态修复重点实验室_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.