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首页> 外文期刊>RSC Advances >Activated charcoal mediated purification of Yellow Sodium Sulphate: a green process to utilize a hazardous by-product of the leather chemical industry
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Activated charcoal mediated purification of Yellow Sodium Sulphate: a green process to utilize a hazardous by-product of the leather chemical industry

机译：活性炭介导的黄色硫酸钠纯化：采用皮革化学工业危险副产品的绿色工艺

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摘要

Basic Chrome Sulphate (BCS) is an important industrial chemical, which is predominantly used in the leather tanning process. During the production of BCS, huge amounts of non-utilizable, hazardous by-product, Yellow Sodium Sulphate (YSS), are generated which is basically Na2SO4 contaminated with similar to 1% Na2Cr2O7. Huge accumulation of this YSS has become a matter of concern for BCS manufacturers particularly due to its severe pollution potential. The present study showed that contaminated Cr(VI) could be completely reduced to less toxic Cr(III) when the YSS solution was treated with Activated charcoal at pH <= 2. Thereafter, Cr(III) was successfully separated from the solution by precipitating at pH similar to 12; subsequently 99% pure Na2SO4 with 98.5% yield (with respect to YSS) was recovered from the filtrate. A recycling study indicated that the efficiency of activated charcoal for the treatment of Cr(VI) in YSS remained unaffected up to five times of reuse. The purified Na2SO4 and the separated Cr(III) residue both may be utilized again for their respective purposes.
机译：基本铬硫酸盐（BCS）是一种重要的工业化学品，主要用于皮革鞣制过程。在BCS的生产过程中，产生大量不可使用的，危险的副产物，黄钠硫酸钠（YSS），其基本上是Na 2 SO 4，其污染与1％NA2CR2O7类似。巨大的积累成为BCS制造商特别是由于其严重的污染潜力问题。本研究表明，当在pH <= 2的活性炭处理YSS溶液时，污染的Cr（vi）可以完全降低到较小的毒性Cr（iii）。此后，通过沉淀成功地将Cr（III）与溶液中成功分离出来在类似于12的pH下;随后，从滤液中回收99％纯Na 2 SO 4，产率为98.5％（相对于YSS）。回收研究表明，在YSS中治疗Cr（VI）的活性炭效率仍未受到达到5次重用的影响。纯化的Na 2 SO 4和分离的Cr（III）残留物两者都可以再次用于各自的目的。

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  • 来源
    《RSC Advances》 |2016年第59期|共6页
  • 作者

    Chatterjee Sandipan; De Rajarshi; Gupta Arka;

  • 作者单位

    CSIR Cent Leather Res Inst RCED Kolkata 3-1C Matheswartala Rd Kolkata 700046 India;

    CSIR Cent Leather Res Inst RCED Kolkata 3-1C Matheswartala Rd Kolkata 700046 India;

    CSIR Cent Leather Res Inst RCED Kolkata 3-1C Matheswartala Rd Kolkata 700046 India;

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  • 正文语种 eng
  • 中图分类 化学;
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