刘翠翠,李克强,梁生康,陈善乔,李敏,王修林

• 1:中国海洋大学海洋化学理论与工程技术教育部重点实验室
• 2:海洋国家实验室海洋生态与环境科学功能实验室

摘要(Abstract)：

针对不同陆源溶解有机氮(DON)组成和生物可利用性的差异,选取大沽河、海泊河污水处理厂、啤酒厂和李村河等典型农业源、城镇生活源、工业源和城镇面源DON开展实验室培养实验。不同陆源DON生物可利用性存在显著差异(p<0.05),其中,城镇生活源和工业源DON生物可利用占比(41%±8%)和降解速率(啤酒厂(0.67±0.08)d~(-1),海泊河污水处理厂(0.51±0.08)d~(-1))最高,城镇面源DON生物可利用占比(37%±10%)和降解速率(0.32±0.03)d~(-1))均略低,而农业源DON生物可利用占比(29%±6%)和降解速率(0.29±0.06)d~(-1))均最低。不同来源DON生物可利用性的差异,反应在细菌生长状况上,二者显著正相关。SUVA_(254)可以用以表征DON的生物可利用性,二者负相关。利用三维荧光光谱可以将陆源DON分为类蛋白和类腐殖质组分,在培养过程中,类蛋白质组分含量逐渐降低,类腐殖质组分含量逐渐升高,说明前者在微生物降解DON中优先被利用,并有可能转化为后者,表现为腐殖化指数升高。

关键词(KeyWords)： 溶解有机氮;生物可利用性;三维荧光;SUVA_(254);胶州湾

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41676062);; 国家基金委-山东省联合基金项目(U1606404)资助~~

作者(Author): 刘翠翠,李克强,梁生康,陈善乔,李敏,王修林

DOI: 10.16441/j.cnki.hdxb.20180210

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