A modified method for the determination of chemical oxygen demand (COD) for samples with high salinity and low organics

被引：83

作者：

Vyrides, I. ^{[1
]}

Stuckey, D. C. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2AZ, England

来源：

BIORESOURCE TECHNOLOGY | 2009年 / 100卷 / 02期

关键词：

Chemical oxygen demand; Modification of the standard method; High salinity; Low organics; PROPOSED METHOD; WASTE-WATER; CHLORIDE;

D O I：

10.1016/j.biortech.2008.06.038

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study proposes a modification to the standard method for the determination of the chemical oxygen demand of samples with a salinity up to 40 g NaCl/L and low organic concentrations (20-230 mg COD/L). The masking of chloride by the use of a HgSO4:Cl ratio of 20:1 prior to digestion, and the use of 3 g K2Cr2O7/L in the digestion solution resulted in an error of less than 10% and 12% for samples containing 40 g NaCl/L at 20-190 mg COD/L and 230 mg COD/L, respectively. Comparison of the standard method with the new proposed method using a synthetic sewage highlights the large errors (50-85%) of the standard method in contrast to an error of less than 10% for the proposed modified method. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：979 / 982

页数：4

共 23 条

[1] Savings and re-use of salts and water present in dye house effluents [J].