| 南大洋普里兹湾沉积物中生物硅的溶解度研究 |
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| 引用本文： | 扈传昱,孙维萍,沈忱,张海生.南大洋普里兹湾沉积物中生物硅的溶解度研究[J].极地研究,2012,24(4):339-345. |
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| 作者姓名： | 扈传昱 孙维萍 沈忱 张海生 |
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| 作者单位： | 1.中国地质大学资源学院，湖北 武汉 430074；
;2.国家海洋局海洋生态系统与生物地球化学重点实验室，浙江 杭州 310012 |
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| 摘 要： | 本文利用中国南极科学考察航次获得的沉积物样品，采用分批（batch）实验方法，获取实验室生物硅溶解度，并结合间隙水中可溶性硅剖面，对普里兹湾沉积物中生物硅的溶出过程进行了初步研究。研究结果如下：在25℃，pH 8条件下，普里兹湾IV-10、 IS-4站表层沉积物中生物硅的实验室溶解度分别为1936、1539μmol/dm3，不同层次沉积物溶出结果显示随深度增加溶解度值降低。根据实验室溶解度数据与间隙水硅酸盐Cd的分析比较，表明研究站位沉积物生物硅的早期成岩过程中生物硅的溶出还伴随有其他化学过程。
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| 关 键 词： | 生物硅 溶解度 沉积物 间隙水 普里兹湾 |
| 收稿时间： | 2012-05-14 |
THE SOLUBILITY OF BIOGENIC SILICA IN THE SEDIMENT OF PRYDZ BAY，THE SOUTHERN OCEAN |
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| Hu Chuanyu,Sun Weiping,Shen Chen,Zhang Haisheng.THE SOLUBILITY OF BIOGENIC SILICA IN THE SEDIMENT OF PRYDZ BAY，THE SOUTHERN OCEAN[J].Chinese Journal of Polar Research,2012,24(4):339-345. |
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| Authors: | Hu Chuanyu Sun Weiping Shen Chen Zhang Haisheng |
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| Abstract: | Laboratory-based solubility determinations of biogenic silica have been performed in batch reactors on sediments from two cores collected in Prydz Bay of the Southern Ocean. The results show that the apparent solubility of BSi(biogenic silica) in the top sediments of IV-10 and IS-4 station were 1930 μmol/dm3 and 1540μmol/dm3, respectively, and decrease with depth in the core. The apparent solubility of BSi were much higher than the value of Cd of DSi (dissolved silica) in pore water. The pore water distributions of DSi record early diagenetic histories that may involve chemical interactions other than simply the dissolution of the deposited BSi. |
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| Keywords: | biogenic silica solubility sediment pore water Prydz Bay |
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