He Qianfeng, Si Shihui, Song Leshan, Yan Haiyan, Yao Yongge, Zhao Di, Cai Qunhuan
School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
Hunan Yonker Research Institute of Environmental Protection Co., Ltd, Changsha, Hunan 410330, China.
Saudi J Biol Sci. 2019 May;26(4):849-853. doi: 10.1016/j.sjbs.2017.07.009. Epub 2017 Jul 20.
The KSO assisted photocatalytic system was applied for treating refractory petrochemical wastewater. Co-TiO/zeolite catalyst synthesized by sol-gel method was demonstrated to possess a good activity towards mineralization of the refractory petrochemical wastewater in the KSO assisted photocatalytic system. Orthogonal design was employed to optimize the reaction parameters, according to the results, KSO dosage was the most prominent impact factor. More experiments were conducted to further enhance the COD removal efficiency. In consideration of both efficiency and costs, the petrochemical wastewater was treated in the KSO assisted photocatalytic system at pH 4, KSO dosage 2.03 g/L, catalyst amount 250 g/L with irradiation by 1 lamp and aeration. The COD removal efficiency reached up to 93.4% with a rate constant of 1.14 × 10 per min, and Co-TiO/zeolite showed a good stability towards the KSO assisted photocatalytic degradation of petrochemical wastewater.
KSO辅助光催化系统被应用于处理难降解石化废水。通过溶胶-凝胶法合成的Co-TiO/沸石催化剂在KSO辅助光催化系统中对难降解石化废水的矿化表现出良好的活性。采用正交设计优化反应参数，结果表明，KSO投加量是最显著的影响因素。进行了更多实验以进一步提高COD去除效率。综合考虑效率和成本，在pH为4、KSO投加量为2.03 g/L、催化剂用量为250 g/L、1盏灯照射并曝气的条件下，在KSO辅助光催化系统中处理石化废水。COD去除效率达到93.4%，速率常数为1.14×10每分钟，且Co-TiO/沸石对KSO辅助光催化降解石化废水表现出良好的稳定性。
