Enhanced chitosan/Fe0-nanoparticles beads for hexavalent chromium removal from wastewater

被引：118
作者：
Liu, Tingyi [1 ,2 ]
Wang, Zhong-Liang [1 ]
Zhao, Lin [2 ]
Yang, Xi [1 ]
机构：
[1] Tianjin Normal Univ, Tianjin Key Lab Water Resources & Environm, Tianjin 300387, Peoples R China
[2] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2012年 / 189卷
基金：
中国国家自然科学基金;
关键词：
Epichlorohydrin (ECH); Nanoscale zero-valent iron (NZVI); Chitosan; Hexavalent chromium; ZERO-VALENT IRON; PERMEABLE REACTIVE BARRIER; ZEROVALENT IRON; CHITOSAN BEADS; GROUNDWATER REMEDIATION; SELECTIVE ADSORPTION; HYDROGEL BEADS; METAL-ION; NANOPARTICLES; ENTRAPMENT;
D O I：
10.1016/j.cej.2012.02.056
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Fe-0 nanoparticles (NZVI) were successfully immobilized on epichlorohydrin/chitosan beads (ECH-CS-NZVI beads) for reduction of Cr(VI) from wastewater. Characterization with scanning electron microscope (SEM) showed that ECH-CS-NZVI beads with an average aperture size of 23.2 mu m mainly consisted of Fe, O, C and N. Fourier transform infrared (FTIR) spectrum suggested that ECH could be grafted to CS-NZVI beads. A marked decrease in crumpling ratios indicated that the mechanical strength of Fe-0-nanoparticles-chito-san (CS-NZVI) beads was obviously enhanced by cross-linking of epichlorohydrin (ECH). The thermal stability of ECH-CS-NZVI beads was also enhanced. Cr(VI) concentration, NZVI dosage, pH values and reaction temperature played an important role in the lifetime and using efficiency of ECH-CS-NZVI beads. Under all experimental conditions, the removal of Cr(VI) using ECH-CS-NZVI beads was consistent with pseudo first-order reaction kinetics. A removal rate could be maintained as high as 76.6% and 48.2% on the second and third runs, respectively, which hinted that ECH-CS-NZVI beads could be regenerated. The study demonstrates that ECH-CS-NZVI beads could become an effective and promising technology for in situ remediation of Cr(VI). (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：196 / 202
页数：7
相关论文
共 43 条
[1]   Kinetics of nitrate, nitrite, and Cr(VI) reduction by iron metal [J].
Alowitz, MJ ;
Scherer, MM .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (03) :299-306
[2]   Synthesis of a chitosan derivative recognizing planar metal ion and its selective adsorption equilibria of copper(II) over iron(III) [J].
Baba, Y ;
Masaaki, K ;
Kawano, Y .
REACTIVE & FUNCTIONAL POLYMERS, 1998, 36 (02) :167-172
[3]   Fluoride removal using lanthanum incorporated chitosan beads [J].
Bansiwal, Amit ;
Thakre, Dilip ;
Labhshetwar, Nitin ;
Meshram, Siddharth ;
Rayalu, Sadhana .
COLLOIDS AND SURFACES B-BIOINTERFACES, 2009, 74 (01) :216-224
[4]   Entrapment of iron nanoparticles in calcium alginate beads for groundwater remediation applications [J].
Bezbaruah, Achintya N. ;
Krajangpan, Sita ;
Chisholm, Bret J. ;
Khan, Eakalak ;
Elorza Bermudez, Juan J. .
JOURNAL OF HAZARDOUS MATERIALS, 2009, 166 (2-3) :1339-1343
[5]   Removal of hexavalent chromium from wastewater using a new composite chitosan biosorbent [J].
Boddu, VM ;
Abburi, K ;
Talbott, JL ;
Smith, ED .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2003, 37 (19) :4449-4456
[6]   Stabilization of chromium ore processing residue (COPR) with nanoscale iron particles [J].
Cao, Hasheng ;
Zhang, Wei-Xian .
JOURNAL OF HAZARDOUS MATERIALS, 2006, 132 (2-3) :213-219
[7]   CHITOSAN MATRIX FOR ORAL SUSTAINED DELIVERY OF AMPICILLIN [J].
CHANDY, T ;
SHARMA, CP .
BIOMATERIALS, 1993, 14 (12) :939-944
[8]   Nitrate removal from aqueous solutions by cross-linked chitosan beads conditioned with sodium bisulfate [J].
Chatterjee, Sudipta ;
Lee, Dae S. ;
Lee, Min W. ;
Woo, Seung H. .
JOURNAL OF HAZARDOUS MATERIALS, 2009, 166 (01) :508-513
[9]   Adsorption behavior of reactive dye in aqueous solution on chemical cross-linked chitosan beads [J].
Chiou, MS ;
Li, HY .
CHEMOSPHERE, 2003, 50 (08) :1095-1105
[10]   Characterization of metal ion interactions with chitosan by X-ray photoelectron spectroscopy [J].
Dambies, L ;
Guimon, C ;
Yiacoumi, S ;
Guibal, E .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 177 (2-3) :203-214
12345