钼铅分离废水中有机抑制剂的光降解及废水回用试验

针对钼铅分离抑制剂在废水中残留导致回水利用困难的问题，将光敏感型抑制剂LM应用于钼铅分离，并进行了分离废水中抑制剂的降解动力学研究。采用光照降解，分别研究了太阳光照射、紫外光照射等不同光源对降解率的影响。结果表明，太阳光与紫外光光源均能激发LM抑制剂的分解程序，最终降解率均能达到99.9%以上。进一步研究了不同pH值对钼铅分离废水中LM抑制剂的降解影响，结果表明酸性环境下降解率加快。经过浮选试验验证，与清水相比，光降解后的选矿废水钼铅分离指标基本一致，因此可以直接回用，采用该抑制剂有利于钼铅分离的清洁生产与节能减排。 

Study on Photodegradation of Organic Depressants in Wastewater from Molybdenum-lead Separation and Wastewater Recycle

The undecomposed residue of molybdenum-lead separation inhibitors remain in wastewater stream makes it difficult to be recycled. To tackle this issue, photodegradable inhibitor LM was used for molybdenum-lead separation, and the degradation kinetics of inhibitor in molybdenum-lead separation wastewater was also studied. The degradation method was photodegradation, and the effects of different light sources such as sunlight irradiation and ultraviolet light irradiation on the degradation rate were studied respectively. The results show that both sunlight and ultraviolet light sources can accelerate the decomposition process of LM, and the final degradation rate can reach more than 99.9%. The effect of different pH values on the degradation of LM in molybdenum-lead separation wastewater stream was further studied, which indicates that, the degradation rate was accelerated in an acidic environment. The verification flotation tests were conducted, the results of which suggest the molybdenum-lead separation wastewater after photodegradation can be directly reused. It is beneficial to clean production, energy saving and emission reduction.