An optimized selective sequential extraction(SSE)procedure was developed to assess the arsenic(As)partitioning in copper slag.The potential As species in copper slag are partitioned into the readily soluble As,dissolv...An optimized selective sequential extraction(SSE)procedure was developed to assess the arsenic(As)partitioning in copper slag.The potential As species in copper slag are partitioned into the readily soluble As,dissolvable arsenates,sparingly soluble arsenates,As residing in sulfides,arsenopyrite and metal As,as well as As incorporated into glassy silicates.The inductively coupled plasma atomic emission spectrometry(ICP-AES),scanning electronic microscopy(SEM),transmission electron microscope(TEM),X-ray diffractometry(XRD)and Fourier transform infrared spectroscopy(FTIR)were used to characterize the leachates and residues produced from the operation scheme.The selectivity and recovery of extractants were evaluated through single-phase extraction procedures.Partitioning data of As in slag samples show good agreement with the reported works and the total As recovery of each operation is over 90%.This suggests that the optimized SEE scheme can be reliably employed for As partitioning in As-bearing byproducts from copper smelting.展开更多
目的了解砷暴露冶炼工人体内尿中不同价态砷(尿形态砷)对肝脏的影响,为有效防治职业性慢性砷中毒提供参考依据。方法于2020年6—11月,选择广西某有色金属大型冶炼企业砷暴露冶炼工人274人(暴露组)和无砷暴露行政后勤人员67人(对照组)进...目的了解砷暴露冶炼工人体内尿中不同价态砷(尿形态砷)对肝脏的影响,为有效防治职业性慢性砷中毒提供参考依据。方法于2020年6—11月,选择广西某有色金属大型冶炼企业砷暴露冶炼工人274人(暴露组)和无砷暴露行政后勤人员67人(对照组)进行尿中总砷(urinary total arsenic,TAs)、尿形态砷二甲基砷酸盐(dimethyl arsenate,DMA)水平测定及肝超声检查,同时检测工作场所空气中砷及其化合物的浓度。结果 274名砷暴露冶炼工人脂肪肝检出率为35.77%,明显高于对照组(20.89%),差异有统计学意义(P<0.05);暴露组TAs、DMA水平[129.00(110.00,176.00)、41.50(24.25,60.95)μg/L]明显高于对照组[43.00(21.75,68.75)、8.60(14.30,19.22)μg/L],差异均有统计学意义(均P<0.05);脂肪肝检出随TAS、尿形态砷MDA浓度增高而增高,差异均有统计学意义(χ_(趋势)^(2)=7.343、6.649,均P<0.05)。结论相关部门应加强对砷暴露冶炼作业工人TAs和尿形态砷检测,以预防脂肪肝的发生。展开更多
基金Projects(51874257,51374185,51801183)supported by the National Natural Science Foundation of China。
文摘An optimized selective sequential extraction(SSE)procedure was developed to assess the arsenic(As)partitioning in copper slag.The potential As species in copper slag are partitioned into the readily soluble As,dissolvable arsenates,sparingly soluble arsenates,As residing in sulfides,arsenopyrite and metal As,as well as As incorporated into glassy silicates.The inductively coupled plasma atomic emission spectrometry(ICP-AES),scanning electronic microscopy(SEM),transmission electron microscope(TEM),X-ray diffractometry(XRD)and Fourier transform infrared spectroscopy(FTIR)were used to characterize the leachates and residues produced from the operation scheme.The selectivity and recovery of extractants were evaluated through single-phase extraction procedures.Partitioning data of As in slag samples show good agreement with the reported works and the total As recovery of each operation is over 90%.This suggests that the optimized SEE scheme can be reliably employed for As partitioning in As-bearing byproducts from copper smelting.
基金Project(52022111)supported by the National Natural Science Fundation for Distinguished Young Scholars of ChinaProject(51974379)supported by the National Natural Science Foundation of China+1 种基金Project(2020SK2006)supported by the High-tech Industry Science and Technology Innovation Leading Plan of Hunan Provice,ChinaProject(2020RC3012)supported by the Huxiang Youth Talent Support Program,China。
基金Foundation item:Project(2022YFC2904204)supported by the National Key R&D Program of ChinaProjects(52364048,52004115)supported by the National Natural Science Foundation of China+5 种基金Projects(202101BE070001-019,202101AT070116,202001AU070045)supported by the Yunnan Fundamental Research Projects,ChinaProject(2020)supported by the Yang Bin Scientist Studio of Yunnan Province,ChinaProject(2022)supported by the Yunnan Talents Support Project,ChinaProject(202302AB080002)supported by the Yunnan Key S&T Special Projects,ChinaProject(231100320300)supported by the Henan Key S&T Special Projects,ChinaProject(KKZ7201952006)supported by the High-level Talent Construction of Kunming University of Science and Technology,China。
文摘目的了解砷暴露冶炼工人体内尿中不同价态砷(尿形态砷)对肝脏的影响,为有效防治职业性慢性砷中毒提供参考依据。方法于2020年6—11月,选择广西某有色金属大型冶炼企业砷暴露冶炼工人274人(暴露组)和无砷暴露行政后勤人员67人(对照组)进行尿中总砷(urinary total arsenic,TAs)、尿形态砷二甲基砷酸盐(dimethyl arsenate,DMA)水平测定及肝超声检查,同时检测工作场所空气中砷及其化合物的浓度。结果 274名砷暴露冶炼工人脂肪肝检出率为35.77%,明显高于对照组(20.89%),差异有统计学意义(P<0.05);暴露组TAs、DMA水平[129.00(110.00,176.00)、41.50(24.25,60.95)μg/L]明显高于对照组[43.00(21.75,68.75)、8.60(14.30,19.22)μg/L],差异均有统计学意义(均P<0.05);脂肪肝检出随TAS、尿形态砷MDA浓度增高而增高,差异均有统计学意义(χ_(趋势)^(2)=7.343、6.649,均P<0.05)。结论相关部门应加强对砷暴露冶炼作业工人TAs和尿形态砷检测,以预防脂肪肝的发生。
