海洋石油高氯生活污水化学需氧量测定方法改进研究
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摘要
海洋石油勘探行业生活污水中含有大量氯离子,正向干扰化学需氧量(COD)监测结果,严重影响测定结果的准确性,给海上平台环保合规运营带来极大隐患。在重铬酸盐法的基础上,通过开展优化及验证实验,开发了一种测定准确、低消耗、低污染的清洁检测方法,为建立适合海洋石油高氯生活污水COD的测定方法提供理论和数据支持。7家检测机构对邻苯二甲酸氢钾标准溶液、环保部环境标准样品及海上生活污水样品的验证实验结果表明,采用低毒的硝酸银作为屏蔽剂,在降低体系酸度的情况下,可以有效屏蔽氯离子并完全氧化有机物,检测结果符合精密度和室间准确度的测试要求。该研究方法适用于海洋石油勘探行业生活污水COD的监测。
Domestic sewage from offshore oil exploration contains a lot of chloride ions. It brings relatively large positive interference to COD monitoring result, making a big potential problem in environmental-compliance operation of offshore oil platforms. In this study, we carried out the optimization experiment of silver precipitation method, established a clean, accurate, low-consumption and low-pollution determination method. The verificationexperiments of 7 testing institutions show that the use of low-toxic silver nitrate as a shielding agent can effectively shield chloride ions and completely oxidize organic matters, and the test results can meet the test requirements of precision and inter-laboratory accuracy, in the case of reducing the acidity of the system. This research method is applicable to the monitoring of COD in domestic sewage from offshore oil exploration.
Domestic sewage from offshore oil exploration contains a lot of chloride ions. It brings relatively large positive interference to COD monitoring result, making a big potential problem in environmental-compliance operation of offshore oil platforms. In this study, we carried out the optimization experiment of silver precipitation method, established a clean, accurate, low-consumption and low-pollution determination method. The verificationexperiments of 7 testing institutions show that the use of low-toxic silver nitrate as a shielding agent can effectively shield chloride ions and completely oxidize organic matters, and the test results can meet the test requirements of precision and inter-laboratory accuracy, in the case of reducing the acidity of the system. This research method is applicable to the monitoring of COD in domestic sewage from offshore oil exploration.
引文
[1]王亮,盛文龙.海上平台生活污水中化学需氧量定性检测方法研究[J].石油石化绿色低碳,2017,2(6):66–70.
[2]全国海洋标准化技术委员会.海洋石油勘探开发污染物排放浓度限值:GB 4914—2008[S].北京:中国标准出版社,2008.
[3]中华人民共和国环境保护部.水质化学需氧量的测定重铬酸盐法:HJ 828—2017[S].北京:中国标准出版社,2017.
[4]赵靖,魏慧贤,高海燕,等.废水COD测定中Cl-干扰排除方法研究[J].应用化工,2017,46(8):1630–1634.
[5]周婷,袁毅,刘锐,等.油气田高氯废水COD测定的两种方法比较研究[J].当代化工,2014,43(10):1974–1980.
[6]蔡毅飞,宗振庸,侯泽明,等.高氯废水的COD测定方法研究与分析[J].工业技术,2017(16):119–120.
[7]梁晓贤,冯霞.高氯废水COD测定方法的进展与评述[J].化工技术与开发,2012,41(8):35–37.
[8]苏令,金亮,章留留.高氯废水COD值测定方法研究[J].云南化工,2017,44(5):71–73.
[9]何锡辉,李良万,王波.COD测定方法研究进展[J].西华大学学报(自然科学版),2006,25(3):51.
[10]《海洋监测质量保证手册》编委会.海洋监测质量保证手册[M].北京:海洋出版社,2000:7.
[11]章亚麟.环境水质监测质量保证手册[S].北京:化学工业出版社,1994:442
[2]全国海洋标准化技术委员会.海洋石油勘探开发污染物排放浓度限值:GB 4914—2008[S].北京:中国标准出版社,2008.
[3]中华人民共和国环境保护部.水质化学需氧量的测定重铬酸盐法:HJ 828—2017[S].北京:中国标准出版社,2017.
[4]赵靖,魏慧贤,高海燕,等.废水COD测定中Cl-干扰排除方法研究[J].应用化工,2017,46(8):1630–1634.
[5]周婷,袁毅,刘锐,等.油气田高氯废水COD测定的两种方法比较研究[J].当代化工,2014,43(10):1974–1980.
[6]蔡毅飞,宗振庸,侯泽明,等.高氯废水的COD测定方法研究与分析[J].工业技术,2017(16):119–120.
[7]梁晓贤,冯霞.高氯废水COD测定方法的进展与评述[J].化工技术与开发,2012,41(8):35–37.
[8]苏令,金亮,章留留.高氯废水COD值测定方法研究[J].云南化工,2017,44(5):71–73.
[9]何锡辉,李良万,王波.COD测定方法研究进展[J].西华大学学报(自然科学版),2006,25(3):51.
[10]《海洋监测质量保证手册》编委会.海洋监测质量保证手册[M].北京:海洋出版社,2000:7.
[11]章亚麟.环境水质监测质量保证手册[S].北京:化学工业出版社,1994:442
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