从含砷废液和废渣中制备三氧化砷

来源期刊：中南大学学报(自然科学版)1993年第4期

论文作者：杨天足 赵天从 卢宜源

文章页码：483 - 489

关键词：砷; 污染; 三氧化砷; 三硫化砷; 废渣; 废水

Key words：arsenic; pollution; arsenic trioxide; arsenic trisulfide; residue; waste water

摘    要：研究了将含砷废液和硫化砷废渣进行综合处理,制备出含As₂O₃达99.0%以上的三氧化砷的方法。用这种方法消除了含砷废水、废渣对环境造成的污染。考察了温度、酸度、液固比、浸出时间等因素对硫化砷中砷浸出率的影响,其中温度和硫酸浓度的影响较大。

Abstract: It was reported that by comprehensively utilizing arsenic-bearing liquid and As₂S₃ residue,commercialarsenic trioxide with 99% purity could be prepared. By this method the pollution caused by arsenic-bearingliquid and As₂S₃ residue can be eliminated. Effects of temperature, acidity, L/S ratio and retention time,etc. on leaching of arsenic in As₂S₃ residue were investigated, among which temperature and H2SO4 con-centration were of significance.