Optimized digestion methods: organic phosphorus sequential extraction, total phosphorus, and nitrogen simultaneous determination in sediments

doi:10.1007/s11368-018-1959-6

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 山东省海岸带环境工程技术研究中心

	Optimized digestion methods: organic phosphorus sequential extraction, total phosphorus, and nitrogen simultaneous determination in sediments
	Zhao, Guoqiang ; Sheng, Yanqing ; Wang, Jing ; Li, Zhaoran ; Yang, Jian
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2018-05
卷号	18 期号:5 页码:2072-2080
关键词	Organic phosphorus Sequential extraction method Simultaneous determination Total phosphorus Total nitrogen
ISSN号	1439-0108
DOI	10.1007/s11368-018-1959-6
产权排序	[Zhao, Guoqiang ; Sheng, Yanqing ; Wang, Jing ; Li, Zhaoran ; Yang, Jian] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai, Peoples R China ; [Zhao, Guoqiang ; Wang, Jing] Univ Chinese Acad Sci, Beijing, Peoples R China
文献子类	Article
英文摘要	The organic phosphorus (OP) that is found in sediments influences the water quality of the overlying water. Accurate methods for OP extraction are important to identify phosphorus fractions in the sediments. We optimized the following: (1) the pH range of solutions after digestion; (2) the amounts of TP, H2SO4, and K2S2O8 in the digestion; and (3) the digestion efficiency between acid K2S2O8 and alkaline K2S2O8 in total phosphorus (TP) and total nitrogen (TN) measurements. Moreover, we explained the related experimental phenomena and the results with an in-depth mechanism. Sediments samples were taken from three locations (Yellow Sea, Jiehe River, and Jiaolai River, China). Each sample was analyzed to optimize sequential OP extraction based on the Ivanoff method. We focused on the digestion step and digestion efficiency between acidic K2S2O8 and alkaline K2S2O8, total phosphorus (TP), and total nitrogen (TN) measurements. The results indicate that the optimal pH range of solutions after digestion is from 3 to 5.5. The TP digestion efficiency in combination withH(2)SO(4) + K2S2O8 (acid) is, on average, 8% higher than that of NaOH+ K2S2O8 (alkaline). However, the results for TN suggest the opposite. Optimal amounts of TP, H2SO4, and K2S2O8 for digestion were also clearly determined. The pH of solutions after digestion affects the color development necessary for effective phosphorus (P) determination. The TP and TN could be determined simultaneously using the alkaline K2S2O8 digestion system under the experimental conditions. Finally, the optimal orthogonal combinations and mass ratios of P, K2S2O8, and H2SO4, respectively, were determined to be similar to 1.5 x 10(-5):1:8 (NaHCO3, 16 h), similar to 5.6 x 10(-5):1:3 (HCl, 3 h), similar to 1.6 x 10(-5):1:5 (NaOH, 16 h), and similar to 1.4 x 10(-5):1:8 (NaOH, 16 h, pH = 0.2). We improved the accuracy and precision of the Ivanoff method using an optimized sequential extraction method.
WOS关键词	LAKE-SEDIMENTS ; ASCORBIC-ACID ; GRASSLAND SOILS ; NATURAL-WATERS ; SULFURIC-ACID ; FRACTIONATION ; OXIDATION ; REGENERATION ; PHOSPHATES ; PERSULFATE
WOS研究方向	Environmental Sciences ; Soil Science
语种	英语
WOS记录号	WOS:000430473300026
资助机构	National Natural Science Foundation of China [41373100] ; Science and Technology Program for Public Wellbeing of Shandong Province [2013kjhm060308] ; CAS Key Technology Talent Program
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/24483]
专题	烟台海岸带研究所_山东省海岸带环境工程技术研究中心烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Guoqiang,Sheng, Yanqing,Wang, Jing,et al. Optimized digestion methods: organic phosphorus sequential extraction, total phosphorus, and nitrogen simultaneous determination in sediments[J]. JOURNAL OF SOILS AND SEDIMENTS,2018,18(5):2072-2080.
APA	Zhao, Guoqiang,Sheng, Yanqing,Wang, Jing,Li, Zhaoran,&Yang, Jian.(2018).Optimized digestion methods: organic phosphorus sequential extraction, total phosphorus, and nitrogen simultaneous determination in sediments.JOURNAL OF SOILS AND SEDIMENTS,18(5),2072-2080.
MLA	Zhao, Guoqiang,et al."Optimized digestion methods: organic phosphorus sequential extraction, total phosphorus, and nitrogen simultaneous determination in sediments".JOURNAL OF SOILS AND SEDIMENTS 18.5(2018):2072-2080.