摘要
以山东省某冶炼企业产生的污酸为研究对象,开展氧化-中和-硫化协同处理污酸中铊、砷的试验研究,分别考察了FeS/As质量比、pH值、FeCl3/FeS摩尔比、温度、反应时间、搅拌强度等因素对污酸中铊、砷去除率的影响。实验得出最优工艺条件为FeCl3/FeS摩尔比为3/1,FeS/As质量比为3/1,氧化反应pH值为3,硫化反应pH值为8,硫化反应温度为30℃,转速为250 r/min,氧化反应和硫化反应时间均为30 min。结果表明,最优工艺条件下,铊的浓度由0.64 mg/L降至0.004μg/L,砷的浓度由11.23 g/L降至5 mg/L以下,砷、铊去除率均能达到99.96%。
Taking the waste acid of a smelting enterprise in Shandong province as the research object,the experimental research on the simultaneous removal of thallium and arsenic in the waste acid by oxidation-neutralization-sulfurization was carried out.The influence of FeS/As mass ratio,pH value,FeCl3/FeS molar ratio,temperature,reaction time,stirring intensity and other factors on the removal rate of thallium and arsenic in smelting acid were studied.The experiments show that the optimal process conditions are:the molar ratio of FeCl3/FeS is 3/1,the mass ratio of FeS/As is 3/1,the pH value of the oxidation reaction is 3,the pH value of the sulfurization reaction is 8,the sulfurization reaction temperature is 30°C,the rotation speed is 250 r/min,the oxidation reaction and the sulfurization reaction time both are 30 min.The results showed that under the optimal process conditions,the concentration of thallium decreased from 0.64 mg/L to 0.004μg/L,the concentration of arsenic decreased from 11.23 g/L to less than 5 mg/L.The removal rate of arsenic and thallium could reach 99.96%.
作者
袁翠玉
万斯
陈焕宇
李彦雨
王兵
欧阳坤
陈润华
YUAN Cuiyu;WAN Si;CHEN Huanyu;LI Yanyu;WANG Bing;OUYANG Kun;CHEN Runhua(Hunan Research Institute for Nonferrous Metals Co.,Ltd.,Changsha 410100,China;Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;School of Environmental Science and Engineering,Central South University of Forestry and Technology,Changsha 410100,China)
出处
《有色金属工程》
CAS
北大核心
2021年第8期141-146,共6页
Nonferrous Metals Engineering
基金
国家重点研发计划项目(2019YFC1805201)。
关键词
冶炼污酸
氧化-中和-硫化
铊
砷
smelting waste acid
oxidation-neutralization-sulfurization
thallium
arsenic
