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基于切向超滤技术的胶体有机碳和无机氮分离及物源初探
姜双城,郑爱榕,林培梅,席英玉,郑盛华,吴立峰,林娇,罗冬莲
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(福建省水产研究所、福建省海洋生物增养殖与高值化利用重点实验室,福建 厦门361013;福建海洋生物资源开发利用协同创新中心,福建 厦门361013;厦门大学海洋与地球学院,福建 厦门 361005;厦门市第五中学,福建 厦门 361004)
摘要:
利用切向超滤技术对九龙江口天然水体中胶体相(1 kDa~0.45 μm)、真溶解相 (<1 kDa)和“溶解相” (<0.45 μm)的溶解有机碳和无机氮进行了分离与提取,初步探讨了水环境因子对其理化特性的影响机制,进而探讨了它们的来源和转化.结果表明,切向超滤过程的膜空白和质量平衡符合技术要求;溶解有机碳、亚硝酸盐氮、氨氮、硝酸盐氮和无机氮存在形式以真溶液相(<1 kDa)为主,其在胶体相中的质量浓度分别为0.207~0.810 mg/dm3、0.001~1.870 μg/dm3、ND~2.08 μg/dm3、0.62~79.30 μg/dm3和1.07~81.10 μg/dm3;胶体态溶解有机碳(COC)含量主要受陆源输入控制.
关键词:  海洋化学  切向超滤技术;胶体;溶解有机碳;硝酸盐氮;无机氮;盐度
DOI:10.3969/J.ISSN.2095-4972.2018.04.014
基金项目:国家海洋局海洋公益性行业科研专项资助项目(201505034-4);福建省科学技术厅公益专项资助项目(2015R1003-12)
Application of the cross-flow ultrafiltration technique to study the separation of colloidal dissolved organic carbon and organic nitrogen with sources study
JIANG Shuang-cheng,ZHENG Ai-rong,LIN Pei-mei,XI Ying-yu,ZHENG Sheng-hua,WU Li-feng,LIN Jiao,LUO Dong-lian
(Fisheries Research Institute of Fujian;Key Laboratory of Cultivation and High-value Utilization of Marine Organisms in Fujian Province, Xiamen 361013, China; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen 361013, China;College of Ocean and Earth Sciences, Xiamen University,Xiamen 361005;Xiamen Fifth Middle School,Xiamen 361004, China)
Abstract:
Based on the cross flow ultrafiltration technique, dissolved organic carbon and inorganic nitrogen of the colloidal phase (1 kDa-0.45 μm), solution phase (<1 kDa) and “dissolved phase” (<0.45 μm) in the natural water of Jiulongjiang Estuary were separated and extracted. The water environmental factors impacting on their physical and chemical properties were analyzed preliminarily and their origin and transformation were further discussed. The results show that the membrane blank and the mass balance of cross flow ultrafiltration process could meet the technical requirements. The dominant status of dissolved organic carbon, nitrite nitrogen, ammonia nitrogen, nitrate nitrogen and inorganic nitrogen were truly dissolved phase (<1 kDa), and their concentrations in the colloidal phase were in range of 0.207-0.810 mg/dm3, 0.001-1.870 μg/dm3, ND-2.08 μg/dm3, 0.62-79.30 μg/dm3 and 1.07-81.10 μg/dm3, respectively. Terrestrial inputs were important factors affecting the COC in Jiulongjiang Estuary.
Key words:  marine chemistry  cross flow ultrafiltration  colloid  dissolved organic carbon  colloidal nitrate  inorganic nitrogen  salinity

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