YIC-IR  > 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, Fande1,2; Yuan, Guodong3; Wei, Jing1; Bi, Dongxue1,2; Wang, Hailong4; Yuan, Guodong(Zhaoqing Univ, Zhaoqing 526061, Guangdong, Peoples R China)
2017-10-01
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
Volume24Issue:29Pages:23006-23014
Contribution Rank第1完成单位
AbstractAdsorption 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.
KeywordHumic Substances Cd Adsorption Soil Remediation Leonardite Ftir Immobilization
DOI10.1007/s11356-017-9947-8
Funding OrganizationChinese National Key Research and Development Program(2016YFD0200303) ; Dongguan Municipal Government(2014607101003) ; Key Research and Development Program of Shandong Province(2016CYJS05A01-1)
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Indexed BySCI
WOS KeywordAQUEOUS-SOLUTIONS ; HEAVY-METALS ; CONTAMINATED SOILS ; SEQUENTIAL EXTRACTION ; ADSORPTION ; CD(II) ; SORPTION ; REMOVAL ; BIOCHAR ; PB(II)
SubtypeArticle
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS IDWOS:000412453500022
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Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/23447
Collection中科院海岸带环境过程与生态修复重点实验室
Corresponding AuthorYuan, Guodong; Yuan, Guodong(Zhaoqing Univ, Zhaoqing 526061, Guangdong, Peoples R China)
Affiliation1.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
First Author AffilicationYantai Institute of Coastal Zone Research, Chinese Academy of Sciences
Recommended Citation
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.
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