摘要
带有表面电荷及含有变价元素的天然铁锰氧化物及氢氧化物具有良好的表面吸附与氧化还原等化学活性。在不同介质条件下 ,它们能不同程度地表现出对Cr6+,Pb2 +,Hg2 +,Cd2 +,As3 +,Cu2 +,Zn2 +,Co2 +,Ni2 +等重金属离子有吸附作用和对NO-3 ,PO3 -4 ,F-,S2 -等阴离子有吸附作用与氧化作用 ,并对苯酚、乙烷、乙烯、合成有机酸等有机物具有吸附和转化降解作用 ,还对CO2 ,NOx 和SO2 等具有分解转化作用。利用这些矿物的环境属性治理水体、土壤及大气污染的方法 ,具有成本低、效果好、无二次污染及有用金属可回收利用等优点 ,展现出广阔的环境矿物学研究与应用前景。
Natural oxides and hydroxides of iron and manganese with surface charges and variable valence elements have relative surface activities on absorption, oxidation and reduction. They can absorb heavy metals of Cr 6+ ,Pb 2+ ,Hg 2+ ,Cd 2+ ,As 3+ ,Cu 2+ ,Zn 2+ ,Co 2+ ,Ni 2+ and anions of NO - 3,PO 3- 4,F -,S 2- at different conditions. They can also absorb, decompose and transform organic compounds of phenol, ethane, ethylene and organic acid as well as inorganic compounds of CO\-2,NO\- x and SO 2.. The methods of treating polluted water, soil and air by the environmental properties of the minerals are of characteristics of economical, effective, recomtaminationless and retrieve metals. It opens up a vast range of prospects for researching and utilizing of environmental mineralogy.
出处
《地学前缘》
EI
CAS
CSCD
2000年第2期473-483,共11页
Earth Science Frontiers
基金
科学技术部攀登特别支持费资助项目!(990 19)
国家自然科学基金资助项目!(49972 0 17)
矿物岩石材料国家专业实验室开放基金资助项
关键词
天然铁锰氧化物
氢氧化物
环境矿物学
污染治理
natural oxides and hydroxides of iron and manganese
environmental mineralogy
water
soil
air
disposal of contaminants
