Effective Cr(VI) Removal from Simulated Groundwater through the Hydrotalcite-Derived Adsorbent

被引：44

作者：

Xu, Yunfeng

Zhang, Jia ^{[1
]}

Qian, Guangren ^{[1
]}

Ren, Zhong ^{[1
]}

Xu, Zhi Ping ^{[2
,3
]}

Wu, Yueying ^{[1
]}

Liu, Qiang ^{[1
]}

Qiao, Shizhang ^{[2
,3
]}

机构：

[1] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200072, Peoples R China

[2] Univ Queensland, ARC, Ctr Excellence Funct Nanomat, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia

[3] Univ Queensland, Sch Engn, Brisbane, Qld 4072, Australia

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2010年 / 49卷 / 06期

关键词：

LAYERED DOUBLE HYDROXIDES; HEXAVALENT CHROMIUM; AQUEOUS-SOLUTIONS; PACKED-BED; ADSORPTION; BIOSORPTION; CHROMATE; PERFORMANCE; WATER;

D O I：

10.1021/ie901469c

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We investigated the feasibility of using calcined hydrotalcite (CHT) as the adsorbent of chromate to treat Cr(VI)-contaminated water through column tests under varied conditions. The column tests reveal that CHT can take up 34.3-44.7 mg(Cr)/g when the Cr(VI) concentration in the influent varies over a range of 50-200 mg/L (e.g., 0.96-3.85 mM) with pH 6-7 at 298 K. This uptake capacity is only reduced to 29.1 mg(Cr)/g when HCO3- (1.0 mM) and Cl- (1.0 mM) coexist in the influent. We note that the treated water is of high quality and is free of Cr(VI), with Mg and Al concentrations of <5-10 mg/L, and a pH of 6.5-7.0. The quick desorption of Cr(VI) from the adsorbent (CHT) has enabled Lis to recover Cr(VI) from the contaminated water and regenerate the adsorbent. All these findings promise CHT as an effective regenerable adsorbent for the remediation of Cr(VI)-contaminated groundwater.

引用

页码：2752 / 2758

页数：7

共 34 条

[1] Biosorption of chromium(VI) ions by Mowital®B30H resin immobilized activated sludge in a packed bed:: comparison with granular activated carbon [J].