铁锰氧化物用于石油开采污染的原水净化研究

Purification Research of Pollutional Raw Water with Oil Exploitation by Fe-Mn Oxide

利用铁锰氧化物吸附铅、铬重金属离子,以净化石油开采污染的原水。试验结果表明,铁锰氧化物对Pb^(2+)、Cr^(6+)具有较好的吸附,在污染原水中去除率分别达到72.3%和77.5%。拟合结果表明:铁锰氧化物对Pb^(2+)、Cr^(6+)的吸附符合准二级反应动力学特征,且随着溶液pH的升高,重金属离子的去除率缓慢增大,而共存有机物(腐蚀酸、尿素)对铁锰氧化物吸附铅、铬离子影响较小,因此铁锰氧化物可推广用于石油开采污染的原水治理。

The heavy metal ions such as Pb^2＋ and Cr^6＋ in raw water were absorbed by Fe-Mn oxide for oil exploitation pollution.The results show that Fe-Mn oxide has strong adsorption ability to both Pb^2＋ and Cr^6＋,and the removal rate in pollutional water was up to 72.3% and 77.5%.Second-order reaction described the adsorption kinetics,with the removal rateof heavy metal ions slowly increased in rising of solution p H.Meanwhile,coexist organics,such as humic acid and carbamide,had no significant effect on these things removal.Therefore,Fe-Mn oxide could be an attractive adsorbent for Pb^2＋ and Cr^6＋ removal from pollutional water by oil exploitation.