膜电浮选法从制革废液中回收可循环利用的三价铬。

A membrane electroflotation process for recovery of recyclable chromium(III) from tannery spent liquor effluent.

机构信息

Corrosion and Material Protection Division, CSIR - Central Electrochemical Research Institute (CSIR - CECRI), Karaikudi, 630 006, India; Academy of Scientific and Innovative Research (AcSIR), CSIR - CECRI, Karaikudi, 630 006, India.

出版信息

J Hazard Mater. 2018 Mar 15;346:133-139. doi: 10.1016/j.jhazmat.2017.11.052. Epub 2017 Dec 2.

DOI:10.1016/j.jhazmat.2017.11.052

PMID:29253752

Abstract

A two-compartment membrane electroflotation reactor has been demonstrated for recovery of recyclable chromium(III) from tannery spent liquor effluent. Dimensionally stable RuO/TiO-Ti and Ti were used as anode and cathode, respectively. The spent liquor effluent was used as catholyte and 0.01 N HSO used as anolyte which was separated by Nafion 117 membrane. About 98% of chromium(III) was recovered and the removal efficiency correlated with the presence of organics in the effluent. The advantage of two-compartment membrane electroflotation process is capable of removing chromium(III) without oxidising it into chromium(VI) in chloride containing tannery spent liquor effluent. The mechanism of chromium(III) removal has been discussed. The recovered Cr(OH) was successfully demonstrated for tanning of cowhide.

摘要

已证明，双隔室膜电浮选反应器可从制革厂废水废水中回收可回收的三价铬。分别使用尺寸稳定的 RuO/TiO-Ti 和 Ti 作为阳极和阴极。用过的废液用作阴极电解液，0.01 N HSO 用作阳极电解液，两者通过 Nafion 117 膜隔开。约 98%的三价铬被回收，去除效率与废水中有机物的存在有关。双隔室膜电浮选工艺的优点是能够在含氯化物的制革厂废水中去除三价铬而不将其氧化成六价铬。已讨论了去除三价铬的机理。回收的 Cr(OH) 已成功用于牛皮鞣制。