EXHAUSTION REGENERATION BEHAVIOR OF CARBOXYLIC RESINS - THE CR(III)/AL(III)/FE(III) SYSTEM

被引：20

作者：

PETRUZZELLI, D ^{[1
]}

ALBERGA, L ^{[1
]}

PASSINO, R ^{[1
]}

SANTORI, M ^{[1
]}

TIRAVANTI, G ^{[1
]}

机构：

[1] CNR,IST RIC ACQUE,I-00186 ROME,ITALY

来源：

REACTIVE POLYMERS | 1992年 / 18卷 / 02期

关键词：

ION EXCHANGE; HEAVY METALS; CARBOXYL RESINS; RESIN REGENERATION; METALS SEPARATION; RESIN DEGRADATION; TANNERIES;

D O I：

10.1016/0923-1137(92)90247-Y

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

It is not an easy task to regenerate chromium(III) ions from weak electrolyte carboxylate resins using conventional chemicals (e.g., mineral acids, saline solutions, alone or in combination). In areas of environmental control, referring to some specific cases of industrial effluents (e.g., tanneries), where metal complexing agents are present, additional difficulties in separation and recovery of the metals may arise by use of carboxylate form resins. Referring to the Cr(III)/Al(III)/Fe(III) ionic system in a solution simulating a typical spent chrome tanning bath, the exhaustion-regeneration behaviour of a commercial acrylic-based macroporous carboxylic resin (i.e., Purolite C106) is reported. The exhaustion behaviour of the resin is straightforward, whereas regeneration by using chemicals, such as sulphuric acid, sodium hydroxide, sodium sulphate, is difficult. The adoption of hydrogen peroxide in alkaline media, during the regeneration step, seems very promising. The general behaviour is interpreted in terms of ionic speciation and complex formation. A mechanistic explanation is provided in support of the experimental findings.

引用

页码：95 / 105

页数：11

共 23 条

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