BIOSORPTION OF HEXAVALENT CHROMIUM BASED ON MODIFIED Y ZEOLITES OBTAINED BY ALKALI-TREATMENT

被引：2

作者：

Figueiredo, Hugo ^{[2
]}

Silva, Bruna ^{[2
]}

Quintelas, Cristina ^{[2
]}

Pereira, Manuel F. R. ^{[3
]}

Neves, Isabel C. ^{[1
]}

Tavares, Teresa ^{[2
]}

机构：

[1] Univ Minho, Ctr Quim, Dept Quim, P-4710057 Braga, Portugal

[2] Univ Minho, Ctr Biol Engn, IBB, P-4710057 Braga, Portugal

[3] Univ Porto, Fac Engn, Dept Engn Quim, LCM,Lab Associado LSRE, P-4200465 Oporto, Portugal

来源：

ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL | 2010年 / 9卷 / 03期

关键词：

alkali-treatment; Arthrobacter viscosus; biosorbent; Cr(VI); NaY Zeolite; DIFFERENT ALUMINUM CONTENT; HIGH-SILICA ZEOLITES; HEAVY-METALS; STRUCTURAL EVOLUTION; CHEMICAL TREATMENTS; AQUEOUS-SOLUTION; ZSM-5; DISSOLUTION; ADSORPTION; REMOVAL;

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The structural modification of external surface of NaY was investigated in order to enhance efficient biosorption systems consisting of a bacterial biofilm, Arthrobacter viscosus, supported on that zeolite, for removing hexavalent chromium from aqueous solutions. The supported bacterial biofilm reduces Cr(VI) to Cr(III) and this cation is then retained in the zeolite by ion exchange. NaY zeolite was modified by alkali-treatments using NaOH 2.0 M, with two different contact periods of time between the zeolite and the alkaline solutions, resulting in NaYA and in NaYB. The biosorbents supported on the modified NaY zeolite were tested in solutions with low concentration of chromium. The results showed that the modification of external surface of NaY zeolite allows an efficient Cr removal, and the maximum removal efficiency was observed for NaYA sample that was submitted to a smoother chemical treatment.

引用

页码：305 / 311

页数：7

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