Removal of Cr (VI) from Aqueous Solutions by Titanate Nanomaterials Synthesized via Hydrothermal Method

被引：14

作者：

Fan, Gongduan ^{[1
,2
]}

Lin, Rujing ^{[1
]}

Su, Zhaoyue ^{[1
]}

Lin, Xiuyong ^{[1
]}

Xu, Renxing ^{[1
]}

Chen, Wei ^{[1
]}

机构：

[1] Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Peoples R China

[2] Fuzhou Univ, Inst Adv Energy Mat, Fujian 350002, Peoples R China

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 2017年 / 95卷 / 04期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

titanate nanomaterials; Cr (VI); adsorption; pH; electrostatic attraction; WASTE-WATER; SELECTIVE REMOVAL; CR(VI) REMOVAL; METAL-IONS; ADSORPTION; NANOTUBES; CHROMIUM; COMPOSITE; CD(II); BIOSORPTION;

D O I：

10.1002/cjce.22727

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Titanate nanomaterials (TNs) were synthesized via a simple hydrothermal method. The physical-chemical properties of the as-prepared TNs, such as morphology, structure, surface area, and chemical composition, were characterized by XRD, SEM, and BET. The absorption capability and adsorptive mechanism of Cr (VI) in aqueous solutions were tested in the static system. The results showed that the TNs prepared with reaction time of 24 h were in pure monoclinic phase which aggregated mutually to form a unique layered structure. TNs were considered excellent adsorbents to Cr (VI). When pH 1, the adsorption capacity was up to 83.91 mg/g. The adsorption kinetics of Cr (VI) followed the pseudo-first order model. The equilibrium adsorption time of TNs was 80 min. The Langmuir isotherm model fitted the equilibrium data best. The adsorption of Cr (VI) onto TNs was an exothermic process, and the adsorption process was mainly composed of electrostatic attraction. The structure of TNs basically remained unchanged after adsorption.

引用

页码：717 / 723

页数：7

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