环境化学
梁斌,兰洁,兰叶青.苦杏仁酸、苹果酸、乳酸对Cr(VI)还原作用的比较[J].环境科学学报,2007,27(8):1326-1330
苦杏仁酸、苹果酸、乳酸对Cr(VI)还原作用的比较
- Comparison of the reduction of Cr(VI) by mandelic, malic and lactic acids
- 基金项目：国家自然科学基金(No.40671089)
- 作者
- 单位
- 梁斌
- 南京农业大学理学院, 南京 210095
- 兰洁
- 徐州师范大学, 徐州 221116
- 兰叶青
- 南京农业大学理学院, 南京 210095
- 摘要：不同温度和pH条件下,通过批式试验研究了苦杏仁酸、苹果酸、乳酸还原Cr(VI)的反应速率.结果表明,这3种α-OH酸还原Cr(VI)的能力表现为:苦杏仁酸>苹果酸>乳酸.苦杏仁酸对Cr(VI)的还原作用受pH变化的影响较大,而乳酸受温度变化的影响较大.同时研究了Mn(II)对3种α-OH酸还原Cr(VI)反应速率的影响.结果表明,Mn(II)对3种α-OH酸还原Cr(VI)均有催化作用,其中对苦杏仁酸表现更为明显.
- Abstract：The reduction of Cr(VI) by mandelic, malic and lactic acids was studied in batch experimental systems at different temperatures and pHvalues. The results showed that the ability to reduce Cr(VI) by the organic acids with α-OHwas in the order:mandelic acid > malic acid > lactic acid. The influence of pHon the reduction of Cr(VI) by mandelic acid was strongest among the three organic acids, and temperature exerted the greatest effect on the reaction between lactic acid and Cr(VI). The influence of Mn(II) on the reduction of Cr(VI) by the three organic acids was also studied. Mn(II) catalysed the reduction of Cr(VI) by α-OHacids, especially mandelic acid.
- Key words：organic acid chromium (VI) reduction catalysis manganese(II)
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