高砷酸性废水中铁的回收利用研究  

Study on The Recovery and Utilization of Iron in High Arsenic Acid Wastewater

作　　者：于旭霞[1] Yu Xuxia(Liaoning Petrochemical College,Liaoning,121001)

机构地区：[1]辽宁石化职业技术学院,辽宁121001

出　　处：《当代化工研究》2021年第20期113-114,共2页Modern Chemical Research

基　　金：辽宁石化职业技术学院2019年度学院课题(LSHYJ1914)成果。

摘　　要：砷,化学名为arsenic(三价砷化学名为arsenite,五价砷化学名为arsenate)。砷的三价和五价化合物均是原生毒物,砷的中毒途径主要是通过饮水及食物进入消化系统。水中的砷能够通过皮肤进入到人体内部,如果长期浸泡会导致砷反应快速进入到人体内而引起砷中毒等问题。砷在水中有不同的化合价形态,而且毒性也各不相同,与生物学效应具有密切关联,对此要高度重视,所以应该对废水中的砷进行全面处理。废水中三价砷的毒性是五价砷的60倍以上。在大多数pH值低于9.5的水中,三价砷是非离子的,并且是电中性的。因此,这种去除五价砷的方法,例如聚集,沉淀和吸附,对于三价砷处理是非常有效的。由于三价砷与五价砷之间的毒性和去除差异很大,因此有必要先将三价砷氧化为五价砷,有效的三价砷去除是含砷废水污染的管理的中心。Arsenic,chemically named arsenic(trivalent arsenic chemically named arsenite,pentavalent arsenic chemically named arsenate).Both trivalent and pentavalent compounds of arsenic are primary poisons,and the main way of arsenic poisoning is to enter the digestive system through drinking water and food.The main route of arsenic poisoning is to enter the digestive system through drinking water and food.Arsenic in wastewater may also enter the human body through damaged skin.Human limbs are immersed in sewage containing arsenic for a long time.Even if the skin is not damaged,it can combine with the fatty acids in the skin and enter the human body.The valence state of arsenic in water is different,and the toxicity of each valence is also very different.The environmental behavior and biological effects of arsenic depend not only on its concentration,but also on its chemical form.The toxicity of trivalent arsenic in wastewater is more than 60 times that of pentavalent arsenic.In most water with a pH below 9.5,trivalent arsenic is non-ionic and electrically neutral.Therefore,this method of removing pentavalent arsenic,such as aggregation,precipitation and adsorption,is very effective for trivalent arsenic treatment.Due to the large difference in toxicity and removal between trivalent arsenic and pentavalent arsenic,it is necessary to first oxidize trivalent arsenic to pentavalent arsenic.Effective trivalent arsenic removal is the center of management of arsenic-containing wastewater pollution.

关 键 词：高砷酸性废水 铁 回收利用 

分 类 号：X703[环境科学与工程—环境工程]