污酸硫化除砷影响因素的试验研究  

Experimental Study on Factors Influencing Arsenic Removal by Sulfidation of Smelting Waste Acid

作　　者：周剑雄 邓军 刘汉阳 Zhou Jianxiong;Deng Jun;Liu Hanyang(Changsha Huashijie Environmental Technology Development Co.,Ltd.,Changsha 410000,China)

机构地区：[1]长沙华时捷环保科技发展股份有限公司,湖南长沙410000

出　　处：《山东化工》2024年第17期256-259,共4页Shandong Chemical Industry

摘　　要：针对污酸溶液中砷离子的含量波动大、投加除砷药剂量大、石膏渣不能稳定达标等问题,以某铜冶炼产生的污酸为对象进行试验,利用硫氢化钠作为除砷药剂,开展硫化除砷操作参数的研究。结果表明:硫氢化钠投加量越大,反应持续时间越长,酸度越大,反应后液中剩余砷离子含量越低。本试验水样按13.6 mg/L投加除砷药剂,反应40 min后,液中剩余砷离子含量≤30 mg/L,砷去除率达到99.6%,保证了反应后液继续处理产生的石膏渣浸出液中总砷含量≤5 mg/L,使石膏渣属于一般固废,达到减少危废渣目的。In order to address the problems of large fluctuations in arsenic ion content,large dosage of sulfurization agents,and unstable compliance of gypsum slag in polluted acid solution,experimental research was conducted on the polluted acid produced by a copper smelting plant.Sodium hydrogen sulfide was used as the arsenic removal agent to study the sulfurization arsenic removal operation parameters.The results showed that the larger the dosage of sodium hydrosulfide,the longer the reaction duration,the higher the acidity,and the lower the residual arsenic ion content in the reaction solution.After adding 1.2 times the theoretical dosage of sodium hydrosulfide and reacting for 40 minutes,the residual arsenic ion content in the reaction solution was less than or equal to 30 mg/L,and the arsenic removal rate reached 99.6%,ensuring that the total arsenic content in the gypsum residue leaching solution produced by the continued treatment of the reaction solution was less than or equal to 5 mg/L,make gypsum residue a general solid waste,achieving the goal of reducing hazardous waste residue.

关 键 词：污酸 硫化 除砷 重金属 硫氢化钠 石膏渣 除砷药剂 

分 类 号：X703[环境科学与工程—环境工程]