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Efficient Removal of Pb(II) from Aqueous Solution by Modified Montmorillonite/Carbon Composite: Equilibrium, Kinetics, and Thermodynamics
Zhu, KC (Zhu, Kecheng)[ 1,2 ]; Jia, HZ (Jia, Hanzhong)[ 2 ]; Wang, F (Wang, Fu)[ 2 ]; Zhu, YQ (Zhu, Yunqing)[ 2 ]; Wang, CY (Wang, Chuanyi)[ 2 ]; Ma, CY (Ma, Chengyu)[ 1 ]
2017
Source PublicationJOURNAL OF CHEMICAL AND ENGINEERING DATA
ISSN0021-9568
Volume62Issue:1Pages:333-340
Abstract

In the present study, a new type of montmorillonite/carbon (MMT/C) adsorbent has been prepared by a one-pot hydrothermal carbonization process. The MMT/C composite was further modified to obtain functionalized MMT/C, i.e., hydroxylated MMT/C, carboxylated MMT/C, and aminated MMT/C. The prepared MMT/C-based sorbents were systematically characterized by X-ray diffraction (XRD), specific surface area, zeta potential, and scanning electron microscopy (SEM). Their adsorption capacity was evaluated by the removal of aqueous Pb(II) ions, following the order carboxylated MMT/C > hydroxylated MMT/C > aminated MMT/C > MMT/C. Moreover, the influential factors for Pb(II) removal by carboxylated MMT/C composites, such as pH, temperature, and initial concentration, were thoroughly explored. The adsorption capacity increases significantly when the pH increases from 2.0. to 5.0 but with minor change beyond. The maximum. adsorption capacities of MMT/C COOH toward Pb(II) are 247.85 mg g(-1). The complexation of surface groups such as -COOH on MMT/C-COOH might be responsible for Pb(II) sorption. The adsorption kinetic follows a pseudo-second-order model; and thermodynamic analysis implies an endothermic and spontaneous chemisorption process. The overall results, suggest that the obtained composites are promising as an adsorbent for effective removal of Pb(II) from water.

DOI10.1021/acs.jced.6b00676
Indexed BySCI
WOS IDWOS:000392035300037
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Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/7104
Collection环境科学与技术研究室
Affiliation1.Donghua Univ, Sch Environm Sci & Engn, Shanghai 200051, Peoples R China
2.Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Zhu, KC ,Jia, HZ ,Wang, F ,et al. Efficient Removal of Pb(II) from Aqueous Solution by Modified Montmorillonite/Carbon Composite: Equilibrium, Kinetics, and Thermodynamics[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2017,62(1):333-340.
APA Zhu, KC ,Jia, HZ ,Wang, F ,Zhu, YQ ,Wang, CY ,&Ma, CY .(2017).Efficient Removal of Pb(II) from Aqueous Solution by Modified Montmorillonite/Carbon Composite: Equilibrium, Kinetics, and Thermodynamics.JOURNAL OF CHEMICAL AND ENGINEERING DATA,62(1),333-340.
MLA Zhu, KC ,et al."Efficient Removal of Pb(II) from Aqueous Solution by Modified Montmorillonite/Carbon Composite: Equilibrium, Kinetics, and Thermodynamics".JOURNAL OF CHEMICAL AND ENGINEERING DATA 62.1(2017):333-340.
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