{"title":"方铅矿在海水中的非氧化溶解动力学","authors":"Rodrigo F. Embile Jr., Ingar Walder","doi":"10.1007/s10498-018-9335-0","DOIUrl":null,"url":null,"abstract":"<p>The rate of non-oxidative galena dissolution in seawater compositions over the pH range of 2–4.5 was determined from batch reactor experiments. The derivative at zero time of a polynomial fit of the Pb concentration versus time data for the first 30?min was used to determine the rate. A plot of <i>R</i><sub>Gn</sub> (rate of galena dissolution) versus pH for data from six experiments is linear (<i>R</i><sup>2</sup>?=?0.96), with a slope of 0.5. The rate equation describing the rate of galena dissolution as a function of hydrogen ion activity is</p><p> Varying the concentration of dissolved oxygen produced no significant effect on the measured rates. The activation energy, based on four experiments carried out over the temperature range of 7–30?°C, is 61.1?kJ/mol.</p>","PeriodicalId":8102,"journal":{"name":"Aquatic Geochemistry","volume":"24 2","pages":"107 - 119"},"PeriodicalIF":1.7000,"publicationDate":"2018-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10498-018-9335-0","citationCount":"5","resultStr":"{\"title\":\"Galena Non-oxidative Dissolution Kinetics in Seawater\",\"authors\":\"Rodrigo F. Embile Jr., Ingar Walder\",\"doi\":\"10.1007/s10498-018-9335-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The rate of non-oxidative galena dissolution in seawater compositions over the pH range of 2–4.5 was determined from batch reactor experiments. The derivative at zero time of a polynomial fit of the Pb concentration versus time data for the first 30?min was used to determine the rate. A plot of <i>R</i><sub>Gn</sub> (rate of galena dissolution) versus pH for data from six experiments is linear (<i>R</i><sup>2</sup>?=?0.96), with a slope of 0.5. The rate equation describing the rate of galena dissolution as a function of hydrogen ion activity is</p><p> Varying the concentration of dissolved oxygen produced no significant effect on the measured rates. The activation energy, based on four experiments carried out over the temperature range of 7–30?°C, is 61.1?kJ/mol.</p>\",\"PeriodicalId\":8102,\"journal\":{\"name\":\"Aquatic Geochemistry\",\"volume\":\"24 2\",\"pages\":\"107 - 119\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2018-03-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1007/s10498-018-9335-0\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Aquatic Geochemistry\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10498-018-9335-0\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aquatic Geochemistry","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1007/s10498-018-9335-0","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Galena Non-oxidative Dissolution Kinetics in Seawater
The rate of non-oxidative galena dissolution in seawater compositions over the pH range of 2–4.5 was determined from batch reactor experiments. The derivative at zero time of a polynomial fit of the Pb concentration versus time data for the first 30?min was used to determine the rate. A plot of RGn (rate of galena dissolution) versus pH for data from six experiments is linear (R2?=?0.96), with a slope of 0.5. The rate equation describing the rate of galena dissolution as a function of hydrogen ion activity is
Varying the concentration of dissolved oxygen produced no significant effect on the measured rates. The activation energy, based on four experiments carried out over the temperature range of 7–30?°C, is 61.1?kJ/mol.
期刊介绍：
We publish original studies relating to the geochemistry of natural waters and their interactions with rocks and minerals under near Earth-surface conditions. Coverage includes theoretical, experimental, and modeling papers dealing with this subject area, as well as papers presenting observations of natural systems that stress major processes. The journal also presents `letter''-type papers for rapid publication and a limited number of review-type papers on topics of particularly broad interest or current major controversy.
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