Facile synthesis of chitosan nanoparticle-modified MnO2 nanoflakes for ultrafast adsorption of Pb(II) from aqueous solution

被引：8
作者：
Han, Tianli [1 ]
Zhang, Xiaoman [2 ,3 ]
Fu, Xiangqian [2 ,3 ]
Liu, Jinyun [2 ,4 ]
机构：
[1] Chaohu Univ, Coll Chem & Mat Engn, Chaohu 238000, Anhui, Peoples R China
[2] Chinese Acad Sci, Inst Intelligent Machines, Nanomat & Environm Detect Lab, Hefei 230031, Anhui, Peoples R China
[3] Univ Sci & Technol China, Dept Chem, Hefei 230026, Anhui, Peoples R China
[4] Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA
来源：
WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY | 2017年 / 17卷 / 01期
基金：
中国国家自然科学基金;
关键词：
adsorption; heavy metal ions; nanoparticles; removal; surface modification; WATER-TREATMENT TECHNOLOGIES; HEAVY-METAL IONS; DYE DEGRADATION; ARSENIC REMOVAL; WASTE; NANOMATERIALS; GROUNDWATER; BEHAVIOR; SORPTION;
D O I：
10.2166/ws.2016.109
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Chitosan nanoparticle (CS NP)-modified MnO2 nanoflakes were presented as a novel adsorbent for fast adsorption of Pb(II) from aqueous solution. Loading dense CS NPs onto mono-dispersive flower-like MnO2 nanostructures reduces the overlap of CS during adsorption, and thus improves the contact of functional adsorption sites on the surface of MnO2 nanoflakes with heavy metal ions. The results show that the removal efficiency of the nanoadsorbents reaches up to 93% in 3 min for Pb(II). In addition, the maximum adsorption capacity, effects of adsorbent dosage and pH value, and the reusability were investigated. The kinetic process and adsorption isotherm fit well with the pseudosecond- order model and Langmuir model, respectively. These findings provide a potential strategy to address the overlap issue of some common nanoadsorbents.
引用
收藏
页码：32 / 38
页数：7
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