渤海西部陆域河流CODMn与TOC浓度分布及相关性研究
2016-10-19陈坤李捷徐庆彤王小龙刘庆庆郝晨林王雪纯
陈坤 李捷 徐庆彤 王小龙 刘庆庆 郝晨林 王雪纯



摘要:2014年5、8和10月分别对渤海西部滨海带陆域海河、马颊河、黄河CODMn和TOC进行测定,分析各河流中CODMn与TOC的浓度变化趋势,并开展二者相关性研究。结果表明,海河、马颊河和黄河CODMn浓度范围分别为2.87~20.25、5.83~14.44、1.80~4.80 mg/L,TOC浓度范围分别为4.26~9.51、5.05~26.62、3.00~16.27 mg/L,其中马颊河有机污染最重,黄河最轻;在海河和马颊河中的两种污染物浓度从上游到下游均呈升高趋势,但在黄河中的变化不大。海河和黄河CODMn和TOC浓度均值受采样时间变化的影响很小,而马颊河中TOC浓度均值在5月和10月有显著差异。三条河流各月份的CODMn和TOC的相关性差异较大,CODMn和TOC协同变化趋势越相似,相关性越显著。
关键词:入海河流;相关性;高锰酸盐指数;总有机碳
中图分类号:X832 文献标识码:A 文章编号:0439-8114(2016)08-1926-05
DOI:10.14088/j.cnki.issn0439-8114.2016.08.007
Abstract: In order to analyze the variation trend of the CODMn and TOC concentration and conduct correlation study, the concentration of CODMn and TOC in the Haihe river,the Majia river and the Yellow river of the western Bohai sea littoral zone were measured in May,August and October 2014,respectively. The results showed that the concentration range of CODMn was 2.87~20.25,5.83~14.44,1.80~4.80 mg/L and concentration range of TOC was 4.26~9.51,5.05~26.62,3.00~16.27 mg/L,respectively.The results showed that organic pollution was most serious in Majia river and slightest in the Yellow river. Concentrations of CODMn and TOC increased from upstream to downstream in the Haihe river and majia riber, while little change was found in Yellow river. The mean concentration of CODMn and TOC was slightly affected by sampling time change. But mean concentration of TOC in Majia river showed significant difference in May and October. The correlation between CODMn and TOC showed significant difference in three rivers. With the trend of the coordinated variation of CODMn and TOC becomes more and more similar, the correlation becomes more and more obvious.
Key words: the river into the sea;correlation;permanganate index;total organic carbon
高錳酸盐指数(CODMn)是常用的反映水体有机污染状况的指标,但是其测定影响因素较多,操作繁琐,氧化能力较弱对各类有机污染物的氧化效率不同,且其容易受水中易被氧化剂氧化的无机还原性物质干扰,所以其在表征水体有机污染时有较大的局限性[1]。而总有机碳(TOC)是以总有机碳的含量来表示水体中有机物总量的综合指标,不受水中其他无机还原性物质的影响,且在测定中其氧化效率非常高,可以完全氧化CODMn测定中不能被氧化的有机物,其测定时操作和维护也较简便,因此与CODMn相比能更加准确地反映水体的有机污染状况[2,3]。理论和实际上都有研究表明,CODMn与TOC存在一定的相关性[4-10],但其相关性与水体污染物类型、季节性变化等因素有关,因此有必要深入探讨不同河流的两种污染物相互关系的差异性与适用性。……
