CAJ | 학술논문

利用NIC MA-800型测汞仪对北太湖水、沉积物及典型水生生物样品的汞含量进行测定，并用单项污染指数法和地积累指数法对其生态风险进行评价。结果表明：北太湖三湾的水体均未受到明显的汞污染，均低于《地表水环境质量标准》第Ⅱ类（≤50 ng·L-1）；沉积物样品，除了竺山湖（平均汞含量为150.5 ng·g-1）稍高于《土壤环境质量标准》第Ⅰ类（≤150 ng·g-1）外，贡湖和梅梁湖均未超标，具体污染情况为竺山湖（中度污染）>贡湖（偏中度污染）>梅梁湖（轻度污染），且整个北太湖沉积物处于中度污染水平；典型水生生物样品（螺蛳、蚬子和鱼）的汞含量均低于我国《农产品安全质量无公害水产品安全要求》（≤300 ng·g-1），其污染大小顺序为鱼（轻污染水平）>蚬子（正常背景水平）>螺蛳（正常背景水平），且鱼、蚬子和螺蛳的汞污染空间分布特征均为竺山湖>贡湖>梅梁湖。对比以往研究结果可知，汞含量浓度稍高且有上升的趋势，故应加大对汞污染的监测及治理。
이용NIC MA-800형측홍의대북태호수、침적물급전형수생생물양품적홍함량진행측정，병용단항오염지수법화지적루지수법대기생태풍험진행평개。결과표명：북태호삼만적수체균미수도명현적홍오염，균저우《지표수배경질량표준》제Ⅱ류（≤50 ng·L-1）；침적물양품，제료축산호（평균홍함량위150.5 ng·g-1）초고우《토양배경질량표준》제Ⅰ류（≤150 ng·g-1）외，공호화매량호균미초표，구체오염정황위축산호（중도오염）>공호（편중도오염）>매량호（경도오염），차정개북태호침적물처우중도오염수평；전형수생생물양품（라사、현자화어）적홍함량균저우아국《농산품안전질량무공해수산품안전요구》（≤300 ng·g-1），기오염대소순서위어（경오염수평）>현자（정상배경수평）>라사（정상배경수평），차어、현자화라사적홍오염공간분포특정균위축산호>공호>매량호。대비이왕연구결과가지，홍함량농도초고차유상승적추세，고응가대대홍오염적감측급치리。
Taihu Lake, the second largest freshwater lake in China, has become polluted in recent years. However, there is little information about mercury pollution. In this study, mercury contents in water, sediments and typical aquatic organisms in Northern Taihu Lake were de-termined using a NIC MA-800 Mercury Analyzer. Single Pollution Index and Index of Geoaccumulation were used to assess ecological risks of mercury. The results showed that mercury concentrations in aqueous phase in three bays of Northern Taihu Lake were lower than the sec-ondary-level standard of the National Surface Water Environment Quality Standard(≤50 ng·L-1). The average mercury concentration in sediments from Gonghu Bay and Meiliang Bay was below the primary standard of the National Soil Environmental Quality Standard(≤150 ng·g-1), whereas higher from Zhushan Bay. Mercury ecological risks was in order of Zhushan Bay(moderate pollution)>Gonghu Bay(partial moderate pollution)>Meiliang Bay(mild pollution). Mercury contents in typical aquatic organisms(snail, corbicula and fish)were all lower than the criteria for Agricultural Product-Safety Standards for Non-Pollution Aquatic Products of China(≤300 ng·g-1). Mercury concentra-tions in typical aquatic organisms were fish(mild pollution)>corbicula(normal background)>snail(normal background level), with Zhushan Bay>Gonghu Bay>Meiliang Bay. Compared with the results from previous studies, mercury concentrations in Northern Taihu Lake were ele-vated. Greater efforts should be made to monitor mercury pollution in Northern Taihu Lake.