珠江口水体TOC与COD关系研究

Correlation analysis between TOC and COD in Pearl River Estuary

基于2012年5月珠江口八大口门（崖门,虎跳门,鸡啼门,磨刀门,横门,洪奇门,蕉门,虎门）TOC与COD监测数据,浅析了两者间可能存在的相关关系。结果表明：调查期间水体TOC浓度范围为1.15~2.30 mg/L,COD浓度范围为1.19~2.99 mg/L,平均浓度分别为1.53 mg/L和1.84 mg/L,两者浓度均为崖门最高;利用葡萄糖溶液初探TOC与COD的关系,结果显示两者显著正相关;对本次调查结果进行相关性分析,结果显示TOC与COD显著正相关,两者可线性拟合为：cTOC=0.677×cCOD＋0.278,γ=0.956。水体有机污染物组成、悬浮物含量和无机还原性物质等均有可能影响TOC与COD的相关关系。在本研究基础上尝试提出了TOC海水水质标准,以期为珠江口海洋环境质量评价和环境管理提供新思路。

The possible correlation between TOC and COD in the eight channels of Pearl River Estuary （Yamen, Hutiaomen,Jitimen, Modaomen, Hengmen, Hongqimen, Jiaomen and Humen） was analyzed based on data obtained from the survey in May,2012. Results indicated that contents of TOC ranged from 1.15 mg/L to 2.30 mg/L and aver- aged 1.53 mg/L,while contents of COD changed between 1.19 mg/L and 2.99 mg/L and averaged 1.84 mg/L,re- spectively. The highest average contents of both TOC and COD were simultaneously observed in Yamen. TOC correla- ted well to COD in Glucose solution in our investigation,with linear regression equation CTOc = 0. 677 X CCOD ＋ 0. 278 （T = 0. 956）. Composition of organic contaminants, content of suspended solid matter and mineral reductive matter all might have effect on the correlation between TOC and COD. Sea water quality standard of TOC was build based on our study to introduce a new way for marine environment quality assessment and environmental management.