Adsorption of cyclic organics generated during electrochemical oxidation of Orange II by activated carbon fibres and toxicity test
Adsorption of cyclic organics generated during electrochemical oxidation of Orange II by activated carbon fibres and toxicity test
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DOI：
10.1016/j.jwpe.2015.04.012
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发表时间：
2015-09
影响因子：
7
通讯作者：
Guoting Li;Yanmin Feng;X. Chai;Ziyan Yang;Xiwang Zhang
中科院分区：
文献类型：
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作者：
Guoting Li;Yanmin Feng;X. Chai;Ziyan Yang;Xiwang Zhang
尽管高级氧化过程可有效去除水溶液中的有机污染物，但其显着缺点之一是产生剧毒的环状有机物。本研究探讨了 Orange II 电化学氧化过程中产生的环状有机物的吸附去除。据观察，环状有机物急剧积累。为了消除氧化处理废水的毒性，尝试使用活性炭纤维去除这些循环有机物。活性炭纤维的吸附去除能力随着氧化时间的延长而下降。染料和环状有机物的去除效率随着溶液 pH 值的增加而降低。升高的反应温度减少了环状中间体的吸收，表明吸附过程是放热的。此外，通过活性碳纤维吸附去除环状中间体，氧化处理废水的毒性显着降低。吸附工艺可能是后处理工艺的最佳替代方案。
Though advanced oxidation processes are effective for the removal of organic pollutants in aqueous solution, generation of highly toxic cyclic organics emerges as one of their significant disadvantages. This study explored the adsorptive removal of cyclic organics generated during electrochemical oxidation of Orange II. It was observed that cyclic organics accumulated dramatically. In order to detoxify the toxicity of oxidation-treated effluent, activated carbon fibre was tentatively used to remove these cyclic organics. The adsorptive removal capability of activated carbon fibre declined with the prolonged oxidation duration. The removal efficiencies for both the dye and cyclic organics decreased with increasing solution pH. The increased reaction temperature reduced the uptake of cyclic intermediates, indicating an exothermic adsorption process. Moreover, the toxicity of the oxidation-treated effluent was significantly reduced by removing the cyclic intermediates via activated carbon fibre adsorption. Adsorption process might be a best alternative for the post-treatment process.