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液膜法分离富集与测定微量砷
SETERMINATION OF MICROAMOUNTS OF ARSENIC AND SEPARATION ENRICHMENT OF ARSENIC WITH LIQUID MEMBRANES
【摘要】 L113B-液体石蜡-磺化煤油-NaOH液膜体系研究了砷的迁移富集行为。实验结果表明,在适宜条件下,As3+的迁移富集率在99.2%以上。在此条件下,许多共存离子如Fe3+、A l3+、Ca2+、Mg2+、Mo6+、Cu2+、Pb2+、Zn2+、Sn2+、N i2+、Sb3+、Co2+、Cd2+等;S iO32-、SO42-、PO43-、C l-、NO3-、C lO4-等,都不渗透进入此液膜。只有As能从这些离子中得到满意的分离。此法用于分离富集测定钼精矿、钼铁中的砷,结果十分满意。
【Abstract】 The transport enrichment of As3+ through the liquid membrane system of L113B-liquid paraffin-sulphonated kerosene and NaOH liquid membrane system has been Studied.Experimental results show that the transport rate of arsenic in 10 min is above 99.2%.In this case many co-ions,such as Fe3+、Al3+、Ca2+、Mg2+、Mo6+、Cu2+、Pb2+、Zn2+、Sn2+、Ni2+、Sb3+、Co2+、Cd2+,SiO2-3、SO2-4、PO3+4、Cl-、NO-3、ClO-4 etc.can not transport through this liquid membrane.So As3+can be separated from these ions with satisfactory.The method can be applied to the determination of As in molybdenum concentrate and ferromolybdenum,the results are satisfactory.
【Key words】 arsenic; liquid membrane; separation and enrichment; molybdenum concentrates;
- 【文献出处】 中国钼业 ,China Molybdenum Industry , 编辑部邮箱 ,2005年06期
- 【分类号】O658;O613.63
- 【下载频次】96