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首页> 外文会议>Biennial conference of the International Association on Water Quality >EFFECT OF INOCULATION OF IRON OXIDIZING BACTERIA ON ELUTION OF COPPER FROM ANAEROBICALLY DIGESTED SEWAGE SLUDGE
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EFFECT OF INOCULATION OF IRON OXIDIZING BACTERIA ON ELUTION OF COPPER FROM ANAEROBICALLY DIGESTED SEWAGE SLUDGE

机译：接种铁氧化菌对厌氧消化污泥中铜洗脱的影响

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The effect of inoculation of iron oxidizing bacteria on elution of Cu from anaerobically digested sewage sludge was investigated without adding ferrous sulfate as a substrate. The inoculation of iron oxidizing bacteria to the sludge brought about the effective elution of Cu at pH 2 and 3. Ferric ion produced by the biological oxidation of ferrous ion which was eluted from the sludge or ferric ion eluted directly from the sludge and iron oxidizing bacteria caused the elution of Cu. Furthermore, both chemical and biological leachings of Cu from CuS were studied at pH 2, 3 and 4. It was found that both ferric ion and iron oxidizing bacteria could elute Cu. The elution rate of Cu with ferric ion decreased as the pH increased and two moles of Fe(III) eluted 1 mole of Cu. The biological leaching by iron oxidizing bacteria eluted Cu more effectively than the chemical one with sulfuric acid or ferric sulfate at pH 2, 3 and 4.
机译：在不添加硫酸亚铁作为底物的情况下，研究了接种铁氧化细菌对从厌氧消化的污泥中洗脱铜的影响。将铁氧化细菌接种到污泥中可有效洗脱pH为2和3的Cu。通过生物氧化从污泥中洗脱的亚铁离子产生的三价铁离子或直接从污泥和铁氧化细菌中洗脱的三价铁离子导致铜的洗脱。此外，还研究了在pH 2、3和4时从CuS浸出Cu的化学和生物浸出。发现铁离子和铁氧化细菌都可以洗脱Cu。随着pH值的增加，铜与三价铁离子的洗脱速率降低，两摩尔的Fe（III）洗脱1摩尔的铜。铁氧化细菌的生物浸出比pH，2、3和4的硫酸或硫酸铁更有效地洗脱了铜。

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