含砷金矿的蜈蚣草除砷预处理初步研究  

Pretreatment of Arsenic Gold Ore by Pteris vittata L.

作　　者：王海娟[1] 宁平[1] 张泽彪[2] 唐兴进[3] 曾向东[1] 王宏镔[1] 瞿广飞[1] 姜永利[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650093 [2]昆明理工大学材料与冶金工程学院,昆明650093 [3]中国黄金集团贵州有限公司,贵阳550005

出　　处：《武汉理工大学学报》2010年第8期59-63,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(30600081);云南省教育厅青年科研基金(07Y40691);云南省科技厅科技计划项目(2009CD033);昆明理工大学分析测试基金

摘　　要：高砷金矿通常为难浸提金矿,因而除砷预处理成为加大金回收提取效率的关键一步。研究通过在砷金矿种植砷超积累植物蜈蚣草来提取去除砷,并且利用EDTA、亚硫酸氢钠、磷酸二氢铵、碳酸氢钠、柠檬酸和硝酸铵6种不同试剂各3个浓度梯度进行调控淋洗,以期找出对于砷提取有效的调控剂。结果表明,在所研究的活化试剂中除磷酸二氢铵处理下植物去除砷的效率与对照无明显差异外,其余5种试剂对于蜈蚣草除砷均有一定的强化功能,其中EDTA和碳酸氢钠对于活化砷促进植物吸收有较大作用,而柠檬酸对于蜈蚣草生物量的促进作用效果更明显。It is usually difficult to extract gold from arsenic-gold-ore,which requires the removal of arsenic in order to increase extraction efficiency of gold from arsenic gold ore.For this purpose,Pteris vittata L was grown in the arsenic gold ore in pot-experiment.Pteris vittata L.was leached by ethylene diamine tetraacetic acid disodium salt（EDTA-Na2）,ammonium phosphate（NH4H2PO4）,sodium bisulfite（NaHSO3）,citric acid（C6H8O7）,sodium bicarbonate（NaHCO3）,ammonium nitrate（NH4NO3）,and deionized water（as control）, respectively.The tested arsenic gold ore was leached by the above six eluents with different concentrations.In addition,As absorption and concentration in the fronds of Pteris vittata L.under pottrial condition was also examined.The results show that the arsenic contention of Pteris vittata L.was all increased under all eluents except NH4H2PO4.It is obvious that the As extraction of Pteris vittata L.increased by EDTA-Na2 and NaHCO3 treatment.However,biomass has more changes than extraction efficiency under citric acid（C6H8O7） treatment.

关 键 词：含砷金矿 砷超积累植物 蜈蚣草 植物提取 

分 类 号：X37[环境科学与工程—环境工程]