Renewable Energy Research Center, Fukushima Renewable Energy Institute, National Institute of Advanced Industrial Science and Technology, AIST, 2-2-9 Machiikedai, Koriyama, Fukushima, 963-0298, Japan.
Department of Chemistry, College of Science, University of Hafr Al Batin, P.O Box 1803, Hafr Al Batin, 39524, Saudi Arabia; Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, PR China.
J Environ Manage. 2021 Jul 15;290:112605. doi: 10.1016/j.jenvman.2021.112605. Epub 2021 Apr 21.
The total annual output of synthetic dyes exceeds 7 × 10 tons. About 1,000 tons of non-biodegradable synthetic dyes are released every year into the natural streams and water sources from textile wastes. The release of these colored wastewater exerts negative impact on aquatic ecology and human beings because of the poisonous and carcinogenic repercussions of dyes involved in coloration production. Therefore, with a growing interest in the environment, efficient technologies need to be developed to eliminate dyes from local and industrial wastewater. Supercritical water oxidation as a promising wastewater treatment technology has many advantages, such as a rapid reaction and pollution-free products. However, due to corrosion, salt precipitation and operational problems, supercritical water oxidation process did not gain expected industrial development. These technical difficulties can be overcome by application of non-corrosive subcritical water as a reaction medium. This work summarizes the negative impacts of dyes and role of subcritical and supercritical water and their efficiencies in dye oxidation processes.
合成染料的年产量超过 7×10 吨。每年约有 1000 吨不可生物降解的合成染料从纺织废料中释放到自然溪流和水源中。由于染色生产中染料的毒性和致癌影响，这些有色废水的排放对水生生态和人类产生了负面影响。因此，随着人们对环境越来越关注，需要开发高效的技术来从当地和工业废水中去除染料。作为一种很有前途的废水处理技术，超临界水氧化具有反应迅速、无污染产物等优点。然而，由于腐蚀、盐沉淀和操作问题，超临界水氧化工艺并没有获得预期的工业发展。这些技术难题可以通过应用非腐蚀性亚临界水作为反应介质来克服。本文总结了染料的负面影响以及亚临界和超临界水的作用及其在染料氧化过程中的效率。
