Grain-size related nitrogen distribution in southern Yellow Sea surface sediments

• Published in: Chinese journal of oceanology and limnology Vol. 23; no. 3; pp. 306 - 316
• Main Author: 吕晓霞 宋金明 袁华茂 李学刚 詹天荣 李宁 高学鲁 石学法
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01.09.2005; The Graduate School of Chinese Academy of Sciences, Beijing 100039, China; Institute of Oceanology, Chinese Academy of Sciences,No.7 Nanhai Road, Qingdao 266071, China; College of Marine Geoscience, Ocean University of China, Qingdao 266003, China%Institute of Oceanology, Chinese Academy of Sciences,No.7 Nanhai Road, Qingdao 266071, China%Institute of Oceanology, Chinese Academy of Sciences,No.7 Nanhai Road, Qingdao 266071, China
• Subjects: Grain; Grain size; Marine; Nitrogen; Oxidants; Oxidizing agents; Particle size; Sea surface; Sediment; Sediments; 水体污染; 表面沉淀物; INW, Huanghai Sea; grain size; surface sediment; form; the southern Yellow Sea; nitrogen
• ISSN: 0254-4059; 2096-5508; 1993-5005; 2523-3521
• DOI: 10.1007/BF02847153

Forty-eight surface sediments of the southern Yellow Sea are separated into three grain-size fractions. Four forms of extractable nitrogen (nitrogen in ion-exchangeable form (Nie), nitrogen in weak-acid extractable form (Nwa), nitrogen in strong-alkali extractable form (Nsa) and nitrogen in strong-oxidant form (N50))are obtained by the sequential extraction. The results show that the contents and the distributions of the extractable nitrogen in the southern Yellow Sea surface sediments are closely related to sediment grain size. The distributions ofNie, Nso and total nitrogen (TN) present positive correlations with fine particles content, while Nwa and Nsa does not have such correlation. The net contents of all the forms of nitrogen increase with sediment grain size finer.