Bionanocomposites based on layered silicates and cationic starch as eco-friendly adsorbents for hexavalent chromium removal

被引：31

作者：

Koriche, Yamina ^{[1
,2
,3
]}

Darder, Margarita ^{[1
]}

Aranda, Pilar ^{[1
]}

Semsari, Saida ^{[2
]}

Ruiz-Hitzky, Eduardo ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

[2] Univ Saad Dahleb, Dept Chim Ind, Lab Genie Chim, Blida 09000, Algeria

[3] Univ Khemis Miliana, Khemis Miliana 44225, Algeria

来源：

DALTON TRANSACTIONS | 2014年 / 43卷 / 27期

关键词：

AQUEOUS-SOLUTION; ADSORPTION BEHAVIOR; WASTE-WATER; CR(VI); CHROMATE; CHITOSAN; BIOSORPTION; WASTEWATERS; RECOVERY; RED;

D O I：

10.1039/c4dt00330f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Functional bionanocomposites based on two layered silicates, the commercial montmorillonite known as Cloisite (R) Na and a natural bentonite from Algeria, were prepared by intercalation of cationic starch, synthesized with two different degrees of substitution, 0.85 and 0.55. After characterization of the prepared bionanocomposites by XRD and zeta potential measurements, batch studies were conducted to evaluate the adsorption capacity of hexavalent chromium anions from aqueous solution. The adsorption isotherms, adsorption kinetics, and the effect of pH on the process were studied. The removal efficiency was evaluated in the presence of competing anions such as NO3-, ClO4-, SO42- and Cl-. In order to regenerate the adsorbent for its repeated use, the regeneration process was studied in two different extractant solutions, 0.1 M NaCl at pH 10 and 0.28 M Na2CO3 at pH 12.

引用

页码：10512 / 10520

页数：9

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