Leather Science and Engineering ›› 2024, Vol. 34 ›› Issue (3): 38-44.doi: 10.19677/j.issn.1004-7964.2024.03.006

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Research Progress on Treatment and Recovery of Chromium from Chrome Tanning Wastewater and Sludge

BAI Botao1,2, HAN Qingxin1,2,*, YANG Guangyu1, ZHANG Tao1, WANG Xuechuan1,2   

  1. 1. College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an 710021, China;;
    2. Key Laboratory of Light Chemical Auxiliary Chemistry and Technology of the Ministry of Education & Shaanxi Collaborative Innovation Centre for Light Chemical Auxiliary Chemistry and Technology, Xi’an, Shaanxi 710021, China;
  • Received:2023-10-30 Revised:2024-01-06 Accepted:2024-01-08 Published:2024-06-01 Online:2024-04-25

Abstract: As the concept of "green development" continues to be promoted, traditional tanning industry is increasingly affected by the pollution generated during its production process. The chromium tanning wastewater and sludge produced by the tanning process pose significant environmental and health hazards if not effectively treated and utilized. Additionally, improper handling leads to substantial waste of chromium resources. The development of economical and efficient chromium treatment and utilization technologies is urgent. This paper introduces various treatment methods for chromium-containing wastewater and sludge produced during the tanning process. These methods include recycling, electrocoagulation, bioleaching, and supercritical water oxidation. Furthermore, it provides a summary and outlook on the development of recycling methods for treating chromium in wastewater and sludge. The aim is to foster a new way of thinking about the development of China's leather industry towards greener practices.

Key words: leather industry, chromium tanning wastewater, chromium containing sludge, recycling method, acid leaching

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