Electrochemical Removal of CuII in the Presence of Humic Acid

被引：6

作者：

Barbosa, Claudomiro P. ^{[1
]}

Malpass, Geoffroy R. P. ^{[1
,2
]}

Miwa, Douglas W. ^{[1
]}

Gomes, Luciano ^{[1
]}

Bertazzoli, Rodnei ^{[3
]}

Motheo, Artur J. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[2] Univ Fed ABC, BR-09210170 Santo Andre, SP, Brazil

[3] Univ Estadual Campinas, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2010年 / 21卷 / 04期

关键词：

humic acid; copper removal; water treatment; AQUEOUS-SOLUTIONS; SIMULTANEOUS RECOVERY; EXCHANGE MEMBRANES; DEGRADATION; ELECTRODES; OXIDATION; METALS; KINETICS; ATRAZINE; MODELS;

D O I：

10.1590/S0103-50532010000400010

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The removal of Cu-II (10 mg L-1) complexed by commercial humic acid (100 mg L-1) was studied at different current densities (30-80 mA cm(-2)) using a filter-press cell, Ti/Ru-0.3 Ti0.7O2 anode and stainless steel cathode. The electrolyses were performed with and without membrane separating the cell compartments [(homogeneous anionic (Nafion R117), heterogeneous cationic (Ionac MC-3470) and heterogeneous anionic (Ionac MA-3475)]. The influence of the membrane on the rate of Cu-II removal was bigger for cationic membranes. Current efficiencies up to ca. 55% (Ionac MC-3470) for Cu-II removal at 30 mA cm(-2) were obtained. By combining oxidation and reduction, 100% Cu-II removal was achieved at current efficiencies of 75%. The main path for the removal is the electrostatic interaction with the anode followed by diffusion through the membrane and deposition at the cathode. Additionally, the oxidative degradation of humic acid contributes to the rate of Cu-II removal.

引用

页码：651 / 658

页数：8

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