研究论文
朴河春,袁芷云,刘广深,洪业汤.冻融对土-水系统中亚硝酸盐积累的影响[J].环境科学学报,1995,15(3):281-288
冻融对土-水系统中亚硝酸盐积累的影响
- EFFECT OF FREEZING-THAWING ON THE ACCUMULATION OF NITRITE IN SOIL-WATER SYSTEM
- 朴河春
- 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳 550002
- 袁芷云
- 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳 550002
- 刘广深
- 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳 550002
- 洪业汤
- 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳 550002
- 摘要:利用不同类型土壤-水系统,加入一定量的KNO3溶液,进行温度和冻融对脱氮化作用的影响以及亚硝酸盐积累规律的研究,培育实验结果表明,低温下,尤其是冻融条件下亚硝酸盐积累,是由于冻融加强有机质的分解及矿化作用所引起。将此结果用来解释克山病环境地球化学病因:急性克山病往往发生在冬春季节,这可能与冻融条件下水体中大量积累亚硝酸盐有关。
- Abstract:Effects of temperature and freezing-thawing on denitrifcation and accumulation of ni-trite in different soil-water systems were investigated.Incubation experimental results indi-cated that the accumulation of nitrite under low temperature,especially freezing-thawingconditions,is due to enhancing involvement of organic matter in mineralization by freezing-thawing events,which provided the available organic carbon compounds for denitrifyingbacteria,The results have been used to interpret Keshan disease environmental geochemicalpathonecy. Acute Keshan disease is usually prevalent in winter-spring seasons,related tothe accumulation of nitrite in large amounts in the water body under freezing-thawing condi-tions.
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