| 渤海湾北部和西部海域表层沉积物中无机碳形态研究 |
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| 引用本文： | 王允周,高学鲁,杨玉玮.渤海湾北部和西部海域表层沉积物中无机碳形态研究[J].海洋科学,2011,35(2):52-57. |
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| 作者姓名： | 王允周 高学鲁 杨玉玮 |
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| 作者单位： | 1. 中国科学院烟台海岸带研究所海岸带环境过程重点实验室,山东烟台264003;中国科学院研究生院,北京100039
2. 中国科学院烟台海岸带研究所海岸带环境过程重点实验室,山东烟台,264003 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目(KZCX1-YW-06-02,KZCX2-YW-Q07-03, KZCX2-YW-JC203) |
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| 摘 要： | 采用氯化钠(NaC1)、氨水(NH3·H2O)、氢氧化钠(NaOH)、盐酸羟胺(NH2OH·HC1)溶液对渤海湾北部和西部海域表层沉积物中无机碳进行了连续浸取,并将无机碳分为5种赋存形态:交换态(NaCl相)、弱碱结合态(NH3·H2O相)、强碱结合态(NaOH相)、弱酸结合态(NH2OH·HCl相)和残渣态.同时,结...
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| 关 键 词： | 渤海湾 沉积物 连续浸取 无机碳形态 |
| 收稿时间： | 2010/1/20 0:00:00 |
| 修稿时间： | 2010/4/24 0:00:00 |
Fractionation of inorganic carbon in the surface sediments of northern and western Bohai Bay |
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| WANG Yun-zhou,GAO Xue-lu,YANG Yu-wei.Fractionation of inorganic carbon in the surface sediments of northern and western Bohai Bay[J].Marine Sciences,2011,35(2):52-57. |
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| Authors: | WANG Yun-zhou GAO Xue-lu YANG Yu-wei |
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| Institution: | WANG Yun-zhou1,2,GAO Xue-lu1,YANG Yu-wei1,2(1.Key Laboratory of Coastal Environmental Processes,Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai 264003,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | Fractionation of inorganic carbon (IC) in the surface sediments of northern and western Bohai Bay was extracted sequentially with solutions of sodium chloride (NaCl), ammonia (NH3·H2O), sodium hydroxide (NaOH), hydroxylamine hydrochloride (NH2OH·HCl), resulting in five fractions: the exchangeable fraction (NaCl fraction), weak alkali extractable fraction (NH3·H2O fraction), strong alkali extractable fraction (NaOH fraction), weak acid extractable fraction (NH2OH·HCl fraction), and residual fraction. Combined with other sediment geochemical parameters, the factors which affected the IC content were discussed. The results showed that in the surface sediments of the study area, the average contents of IC in different fractions, i.e. NaCl fraction, NH3·H2O fraction, NaOH fraction, NH2OH·HCl fraction and Residual fraction, were 0.66, 0.86, 0.23, 2.56 and 0.46 mg/g, respectively. The NaOH fraction accounted for the smallest proportion (about 5%) of the TIC. The NH2OH·HCl fraction ration was the largest, in the vicinity of 50%. Correlation analysis among different IC fractions and geochemical parameters indicated that the sediment moisture content, total nitrogen (TN), total organic carbon (TOC) and sediment fine fraction had a highly significant effect on the NH3·H2O fraction of IC; TN and TOC had a significant effect on the NaOH fraction IC; sediment moisture content had a significant effect on residual fraction IC; and there was no significant correlation between various sediment geochemical factors and the other two fractions. During early digenesis, there might be a certain transformation between the NaCl and the residual fractions of IC. |
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| Keywords: | Bohai Bay sediment sequential extraction fractionation of inorganic carbon |
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