A spectrophotometric method for determination of chemical oxygen demand using home-made reagents

被引：57

作者：

Li, Jun ^{[1
]}

Tao, Tao ^{[1
]}

Li, Xue-bin ^{[2
]}

Zuo, Jiao-lan ^{[1
]}

Li, Tong ^{[1
]}

Lu, Jin ^{[1
]}

Li, Shu-hui ^{[1
]}

Chen, Li-zhen ^{[3
]}

Xia, Chun-yang ^{[3
]}

Liu, Yong ^{[3
]}

Wang, Yan-li ^{[4
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan 430074, Peoples R China

[2] Nantong Vocat & Tech Shipping Coll, Nantong 226006, Jiangsu, Peoples R China

[3] Wuhan Xincheng Wastewater Treatment Co Ltd, Wuhan 430056, Hubei, Peoples R China

[4] Wuhan Construct & Installat Engn Co Ltd, Wuhan 430010, Hubei, Peoples R China

来源：

DESALINATION | 2009年 / 239卷 / 1-3期

关键词：

COD; Potassium dichromate method; Spectrophotometry; Calibration curves; Home-made reagents; REDOX COLOR INDICATOR; MICROWAVE DIGESTION; WASTE-WATER; ORGANIC-CARBON; OXIDATION; SYSTEM;

D O I：

10.1016/j.desal.2008.03.014

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A novel spectrophotometric assay method using home-made reagents that can be used to determine the chemical oxygen demand (COD) in real wastewater is described. The home-made reagents were used instead of the American Hach reagents. The principle of measurement was based on direct determination of the concentration change that Cr(6+) is reduced intensely to Cr(3+) resulting from potassium dichromate oxidation of organic compounds. The method of home-made COD reagents has been introduced. The good calibration curves for COD values between 0-1500 mg l(-1) were obtained. The proposed method has the advantages of high selectivity, good sensitivity, fast reaction time, economy, good precision and accuracy and high stability. The method was successfully applied to determine the COD concentration of real wastewater from an urban wastewater treatment plant. The results compared fairly well with data obtained using the standard method.

引用

页码：139 / 145

页数：7

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