高砷锑烟尘浸出毒性研究
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摘要
为了评价高砷锑烟尘对环境的影响,模拟酸雨、淡水、盐碱地等自然环境,采用去离子水、硫酸-硝酸混合溶液、醋酸缓冲溶液、Na OH溶液(pH=10、pH=11、pH=13) 6种浸出剂测定了As、Sb的浸出毒性。结果表明,浸出温度20℃时,在去离子水、硫酸-硝酸、醋酸和Na OH体系中As最低浓度分别为1.66、1.62、0.82和1.59 g/L,最高浓度分别为2.13、2.11、1.13和2.77 g/L; Sb最低浓度分别为2.65、2.36、0.41和0.53 g/L,最高浓度分别为2.96、2.68、0.72和2.98 g/L。随着浸出温度升高,浸出液中As、Sb浓度更大。
Leaching toxicity of As and Sb was respectively measured using 6 leaching agents,including deionized water,sulfuric acid-nitric acid solution,acetic acid solution,NaOH solution(pH = 10,pH = 11,pH = 13),by simulating natural environmental condition,including acid rain,fresh water and saline alkali land,so as to evaluate impact of high arsenic antimony bearing dust on environment. Results showed that after leaching at 20 ℃,in deionized water system,sulfuric-nitric acid system,acetic acid system and sodium hydroxide system,the lowest concentration of As was 1.66,1.62,0.82 and 1.59 g/L,respectively,while the highest concentration was 2.13,2.11,1.13 and 2.77 g/L,respectively.While the lowest concentration of Sb was 2.65,2.36,0.41 and 0.53 g/L,respectively,and the highest concentration was 2.96,2.68,0.72 and 2.98 g/L,respectively. It is shown that both the concentrations of As and Sb in the lixivium are increased with the rising of temperature.
Leaching toxicity of As and Sb was respectively measured using 6 leaching agents,including deionized water,sulfuric acid-nitric acid solution,acetic acid solution,NaOH solution(pH = 10,pH = 11,pH = 13),by simulating natural environmental condition,including acid rain,fresh water and saline alkali land,so as to evaluate impact of high arsenic antimony bearing dust on environment. Results showed that after leaching at 20 ℃,in deionized water system,sulfuric-nitric acid system,acetic acid system and sodium hydroxide system,the lowest concentration of As was 1.66,1.62,0.82 and 1.59 g/L,respectively,while the highest concentration was 2.13,2.11,1.13 and 2.77 g/L,respectively.While the lowest concentration of Sb was 2.65,2.36,0.41 and 0.53 g/L,respectively,and the highest concentration was 2.96,2.68,0.72 and 2.98 g/L,respectively. It is shown that both the concentrations of As and Sb in the lixivium are increased with the rising of temperature.
引文
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[11]HJ/T 300-2007,固体废物浸出毒性浸出方法醋酸缓冲溶液法[S].
[2]刘慧敏,王春波,张月,等.温度和赋存形态对燃煤过程中砷迁移和释放的影响[J].化工学报,2015,66(11):4643-4651.
[3]Liu W,Yang T,Zhang D,et al.A new pyrometallurgical process for producing antimony white from by-product of lead smelting[J].JOM,2014,66(9):1694-1700.
[4]童志权.含砷铜精矿湿法冶炼新工艺的研究[J].有色金属(冶炼部分),1981,20(3):42-46.
[5]张广积,刘小娟,李媛媛,等.含砷废物的无害化处理[J].工程研究-跨学科视野中的工程,2015(4):392-397.
[6]易宇,石靖,田庆华,等.高砷烟尘氢氧化钠-硫化钠碱性浸出脱砷[J].中国有色金属学报,2015,25(3):806-814.
[7]GB 5085.3-2007,危险废物鉴别标准浸出毒性鉴别[S].
[8]熊珊.含砷废液臭葱石沉砷研究[D].长沙:中南大学冶金科学与工程学院,2012.
[9]徐慧,闵小波,梁彦杰,等.机械力活化Fe-MnO2稳定含砷废渣[J].中国有色金属学报,2017,27(10):2170-2179.
[10]HJ/T 299-2007,固体废物浸出毒性浸出方法硫酸硝酸法[S].
[11]HJ/T 300-2007,固体废物浸出毒性浸出方法醋酸缓冲溶液法[S].
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