| 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
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| 发表期刊 | JOURNAL OF SOILS AND SEDIMENTS
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| ISSN | 1439-0108 |
| 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 |
| 研究领域 | Environmental Sciences & Ecology ; Agriculture |
| 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 |
| 作者部门 | 海岸带环境工程技术研究与发展中心 |
| 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. |
| 文章类型 | Article |
| 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 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | LAKE-SEDIMENTS ; ASCORBIC-ACID ; GRASSLAND SOILS ; NATURAL-WATERS ; SULFURIC-ACID ; FRACTIONATION ; OXIDATION ; REGENERATION ; PHOSPHATES ; PERSULFATE |
| 研究领域[WOS] | Environmental Sciences ; Soil Science |
| WOS记录号 | WOS:000430473300026 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/24483 |
| 专题 | 中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心 中国科学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. |
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