The Determination and Treatment of Waste Water with Chromium
Received date: 2000-11-02
Online published: 2001-01-10
刘霞 , 胡应喜 , 李燕芸 , 王欣 , 陈艳 . 含铬废水的测定与处理[J]. 中国科学院大学学报, 2001 , 18(1) : 37 -42 . DOI: 10.7523/j.issn.2095-6134.2001.1.007
The methods are studied for treatment an iodometric microdetermination of chromium in waste water. Cr(III) can be reduced from Cr(VI) with Fe(NH 4) 2(SO4) 2·6H2O as reductant then be removed mostly with the co precipitation. The proposed method can be used to treat the waste water with Cr(VI). The microgram amount of chromium system can be determined by iodometric complification method. The method offers 9 fold amplification for Cr(III). The method is based on oxidation of Cr(III) with an excess of periodate, masking the unreacted periodate with molybdate and subsequent iodomertric determination of the liberated iodate. Cr(VI) can be determined by this method after prior reduction to Cr(III) with saturated sodium sulphite in sulphuric acid. When the amount of chromium is less than 340 μg,the average recovery obtained is 99.7%.
Key words： chromium; amplification reaction; iodometry; treatment of waste water; periodate
1 Я M 格鲁什科.工业废水中有害无机化合物.北京 :化学工业出版社, 1984
2 黄志英, 何先莉, 武铮.活性氧化铝分离 ——— DPC 光度法测定工业废水中 Cr(III)-Cr(VI).分析化学, 1988, 16(2):110
3 罗川南, 魏琴, 姜山.工业污水中微量铬的快速测定.工业水处理, 1994, 14(5):29
4 R Belcher.Amplification Reaction.Talanta, 1968, 15:357
5 Y A Gawargious et al.New Iodometric Methods for the Microdetermination of Arsenic in Organic Compound.Talanta, 1976, 23:
513
6 A Besada et al.Micro and Submicro Iodometric Determination of Arsenite and Sulphite Ions by Amplification Reactions.Talanta,1976, 23 :392
7 张明浩, 詹国平.增敏碘量法同时测定微量 M n(II)、Mn(VII)、Cr(III)、Cr(VI).化工环保, 1999, 19(4):233
8 A M El-Wakil et al.Iodometrio Determination Reactions.Talanta, 1993, 40:841
9 邵令娴编.分离及复杂物质分析.北京 :高等教育出版社, 1984
10 王才良主编.中国化工产品分析方法手册, 无机分册.北京 :农业出版社, 1992
11 大连理工大学无机化学教研室编.无机化学.北京 :高等教育出版社, 1990
12 张永吉.化学沉淀法处理电镀废水的新认识和新进展.环境污染与防治, 1993, 15(6):27
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