The Effects of Hydrochloric Acid Pretreatment on Different Types of Clay Minerals
文献类型：期刊论文
| 作者 | Hu, Bin1,2,3; Zhang, Chunxia1,2,4; Zhang, Xiaoyan1,2,4 |
| 刊名 | MINERALS
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 12期号:9页码:18 |
| 关键词 | hydrochloric acid pretreatment clay mineralogy X-ray diffraction |
| DOI | 10.3390/min12091167 |
| 英文摘要 | Clay minerals are common in geological samples and are useful paleoclimate and sediment provenance proxies. Acid pretreatment is the most common method for the separation and purification of clay minerals. Given that hydrochloric acid (HCl) can dissolve chlorite and distinguish it from kaolinite, the HCl digestion method is used to simplify the routine method of clay mineral analysis. However, there have been few studies of the effects of acid digestion on different clay minerals in the context of extracting paleoclimate indicators. In this study, we used illite, chlorite, kaolinite, and two types of smectite to assess the effects of pretreatment with different HCl concentrations at variable temperatures. Our results show that chlorite is the most soluble clay mineral in HCl and can be effectively dissolved in HCl with concentrations of >1 N. The variable crystal structure of smectite affects its solubility in HCl. Ca-rich smectite, which has more cation substitution of octahedral Al, can be dissolved with HCl. However, Na-rich smectite, which has less cation substitution for octahedral Al, is hardly dissolved in HCl of any concentration or at any temperature. Illite can be partly dissolved in HCl, and the threshold beyond which dissolution occurs is 5 N HCl at 70 degrees C. Kaolinite is relatively difficult to dissolve in HCl. Given that the HCl digestion method uses the peak intensity of the bulk sample X-ray diffraction (XRD) analysis, whereas the routine method uses the peak area of clay particles, we compared the results of clay mineral quantification and the paleoclimate proxy obtained using the two methods for synthetically prepared mixed and natural clay samples. The results obtained with the HCl digestion method are less accurate than those obtained with the routine method because of the dissolution of illite and smectite in HCl. Therefore, the HCl pretreatment method is not suitable for clay mineral analysis in paleoclimate studies. The present results provide reference data for future studies that employ the acid dissolution pretreatment of clay mineral samples to acquire and quantify paleoclimate proxies. |
| WOS关键词 | SOUTH CHINA SEA ; SURFACE SEDIMENTS ; SEQUENCE ; XRD ; SOILS ; MODEL |
| 资助项目 | National Natural Science Foundation of China[42072209] ; National Natural Science Foundation of China[41722206] ; National Natural Science Foundation of China[41690114] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[42107473] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; International Cooperation Program of the Chinese Academy of Sciences[131C11KYSB20160061] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000856849500001 |
| 出版者 | MDPI |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences ; International Cooperation Program of the Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/108352]  |
| 专题 | 地质与地球物理研究所_中国科学院新生代地质与环境重点实验室 |
| 通讯作者 | Zhang, Chunxia |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Bin,Zhang, Chunxia,Zhang, Xiaoyan. The Effects of Hydrochloric Acid Pretreatment on Different Types of Clay Minerals[J]. MINERALS,2022,12(9):18. |
| APA | Hu, Bin,Zhang, Chunxia,&Zhang, Xiaoyan.(2022).The Effects of Hydrochloric Acid Pretreatment on Different Types of Clay Minerals.MINERALS,12(9),18. |
| MLA | Hu, Bin,et al."The Effects of Hydrochloric Acid Pretreatment on Different Types of Clay Minerals".MINERALS 12.9(2022):18. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。