过硫酸盐法处理铁氰废水的研究  

A new approach to the treatment of ferricyanide wastewater with persulfate

作　　者：孙贤波[1] 赵瑶瑶 刘勇弟[1] 付丹 SUN Xian-bo;ZHAO Yao-yao;LIU Yong-di;FU Dan(State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Engineering Research Center for Heavy Metal Pollution Control and Reuse,Shanghai 200031,China;Shanghai Light Industry Research Institute Co.,Ltd.,Shanghai 200031,China)

机构地区：[1]华东理工大学资源与环境工程学院、国家环境保护化工过程环境风险评价与控制重点试验室,上海200237 [2]上海重金属污染控制与资源化工程技术研究中心,上海200031 [3]上海轻工业研究所有限公司,上海200031

出　　处：《安全与环境学报》2018年第4期1463-1467,共5页Journal of Safety and Environment

摘　　要：为实现总氰浓度的达标,采用过硫酸盐热活化和紫外活化处理水中的铁氰化物。考察了反应时间、过硫酸根投加物质的量比及初始pH值对两种活化方式去除铁氰化物中总氰的影响。结果表明,两种活化方式的活化速率和活化过程有所不同。两种活化方式中,反应时间为3 h时总氰浓度均趋于稳定,总氰去除效果均随投加物质的量比增加而减小。热活化中,初始pH值小于10时对反应结果基本没有影响,大于10时呈抑制作用;紫外活化中,初始pH值小于10时无明显影响,大于10时呈促进作用。去除效果对比表明,过硫酸盐紫外活化优于过硫酸盐热活化。The present paper is aimed at presenting a novel approach to the treatment of ferricyanide sewage with persulfate soas for the method to achieve the standard of the total cyanide concentration. For the said purpose,we have investigated and examined the effects of the reaction time,and the dosage of persulfate and the initial p H value on the removal efficiency of the total cyanide through thermal activiation and ultraviolet activation of the ferriccyanide wastewater. The results of our investigation and exploration tend to demonstrate that the concentration of the total cyanide in the blank control group tends to decrease slowly with the prolongation of the reaction time,though the concentration of the total cyanide content tends to remain stable through 4 h experimentation. Practically speaking,under the control group of different initial p H conditions,the concentration of the total cyanide tends to decrease more obviously under the acidic condition,whereas the total cyanide concentration has been found decreased with the reaction process going on in the two activation modes,though the reduction process might be various. On the other hand,in the thermal activation,the decomposition of persulfate can be done faster than that of the total cyanide,and the decomposition rates of the two components remain consistent in the ultraviolet activation,which implies that in the thermal activation,the dosage of persulfate may have a great influence. Nevertheless,when the molar ratio of persulfate to the total cyanide reaches over 1,the excessive persulfate would become SO-4 scavenger,and the excessive free radicals would also be self-quenched so as to result in the weakening of the oxidation capacity. What is more,when the initial p H value is less than 10,there would be little effect on the reaction. In spite of this,when the initial p H value is over 10,there would come about a negative effect. And,in the ultraviolet activation,when the molar ratio of persulfate to the total cyanide reaches 2. 5,the utilization rate may t

关 键 词：环境工程学 铁氰化物 过硫酸盐 热活化 紫外活化 

分 类 号：X703.1[环境科学与工程—环境工程]