Field survey and health risk evaluation of antimony around a point source and waste water purification

对某锑污染源进行了现场调查和健康风险评价。为研究锑的净化方法，分别用人造沸石、锰铋氧化物和铁铋氧化物对含锑废水进行了吸附试验。结果表明：（1）1 NHCl浸提法测得的表层土壤锑含量超过最大自然丰度的11倍。（2）通过生理浸提试验，研究了从土壤中浸提的锑在胃和小肠中的浓度。(3)It据估算，成年人每日从土壤中摄入的锑量约为TDI的1/20。然而，它相当于婴儿TDI的约1/2。（4）当氧化锰：氧化铋为1：1或1：0.8时，吸附法净化溶液中锑的效果最好。400℃ ~ 500 ℃是最有效的煅烧温度。在上述条件下，锑的萃取率大于99.9%。（5）在所研究的吸附剂中，氧化铁铋对锑的吸附效果最好。

Field survey and health risk evaluation were carried out around a industrial plant from which antimony was released into atmosphere and river. Toward a development of antimony purification from waste water, adsorption test were carried out using artificial zeolite, manganese-bismuth oxide or iron-bismuth oxide. The results can be summarized as follows :(1)Antimony concentrations in surface soil, obtained by 1NHCl extraction test, exceeded 11 times of maximum natural abundance.(2)Physiologically based extraction tests were carried out to examine the antimony concentration in the stomach and small intestine eluted from soil.(3)It was estimated that daily antimony intake from soil is about 1/20 of TDI for the adult. However, it corresponds to about 1/2 of TDI for the infant.(4)Antimony purification from solution by adsorption was the most effective when manganese oxide : bismuth oxide was 1:1 or 1:0.8 as adsorbent. 400℃-500℃ was the most effective temperature for calcination. Extraction ratio of antimony were more than 99.9% at the previously described conditions.(5)Iron-bismuth oxide was the most effective adsorbent for antimony among all adsorbents which were investigated in this study.