Pu Sun, Jibo Wang, Xingbin Li, Chang Wei, Zhigan Deng, Minting Li
{"title":"硫酸铅在硫酸铁介质中的相变特性","authors":"Pu Sun, Jibo Wang, Xingbin Li, Chang Wei, Zhigan Deng, Minting Li","doi":"10.1016/j.jhazmat.2024.136577","DOIUrl":null,"url":null,"abstract":"The phase transformation characteristics of lead sulfate (PbSO<sub>4</sub>) in a sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) system were studied, focusing on the effects of temperature, H<sub>2</sub>SO<sub>4</sub> concentration, ferric iron (Fe<sup>3+</sup>) concentration, sodium sulfate (Na<sub>2</sub>SO<sub>4</sub>), and potassium sulfate (K<sub>2</sub>SO<sub>4</sub>). The conversion of PbSO<sub>4</sub> was analyzed by characterizing the composition and structure of the solid product through XRD, SEM/BSE-EDS, and FT-IR. The results indicated that the effect of temperature on PbSO<sub>4</sub> transformation was influenced by H<sub>2</sub>SO<sub>4</sub> concentration. The temperature threshold for PbSO<sub>4</sub> conversion to lead jarosite (Pb-J) decreased from 150 to 90℃ as H<sub>2</sub>SO<sub>4</sub> concentration decreased from 20 to 5<!-- --> <!-- -->g/L. At 150℃, the amount of jarosite generated decreased significantly from 86.04 to 9.76%. Subsequently, when H<sub>2</sub>SO<sub>4</sub> concentration exceeded 40<!-- --> <!-- -->g/L, PbSO<sub>4</sub> was essentially unchanged. Concurrently, Pb-J formation correlated with the partial formation of hydronium jarosite (H-J). The production of jarosite was inhibited when the solution pH was ~ 0.3 or lower. Furthermore, the increase in Fe<sup>3+</sup> concentration facilitated Pb-J formation, whereas Na<sub>2</sub>SO<sub>4</sub> and K<sub>2</sub>SO<sub>4</sub> inhibited Pb-J formation, leading to the formation of potassium jarosite (K-J) and sodium jarosite (Na-J), respectively. This study provided insights into regulating PbSO<sub>4</sub> conversion during sulfide ore oxygen pressure leaching.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"229 1","pages":""},"PeriodicalIF":12.2000,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Phase conversion characteristics of lead sulfate in ferric sulfate medium\",\"authors\":\"Pu Sun, Jibo Wang, Xingbin Li, Chang Wei, Zhigan Deng, Minting Li\",\"doi\":\"10.1016/j.jhazmat.2024.136577\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The phase transformation characteristics of lead sulfate (PbSO<sub>4</sub>) in a sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) system were studied, focusing on the effects of temperature, H<sub>2</sub>SO<sub>4</sub> concentration, ferric iron (Fe<sup>3+</sup>) concentration, sodium sulfate (Na<sub>2</sub>SO<sub>4</sub>), and potassium sulfate (K<sub>2</sub>SO<sub>4</sub>). The conversion of PbSO<sub>4</sub> was analyzed by characterizing the composition and structure of the solid product through XRD, SEM/BSE-EDS, and FT-IR. The results indicated that the effect of temperature on PbSO<sub>4</sub> transformation was influenced by H<sub>2</sub>SO<sub>4</sub> concentration. The temperature threshold for PbSO<sub>4</sub> conversion to lead jarosite (Pb-J) decreased from 150 to 90℃ as H<sub>2</sub>SO<sub>4</sub> concentration decreased from 20 to 5<!-- --> <!-- -->g/L. At 150℃, the amount of jarosite generated decreased significantly from 86.04 to 9.76%. Subsequently, when H<sub>2</sub>SO<sub>4</sub> concentration exceeded 40<!-- --> <!-- -->g/L, PbSO<sub>4</sub> was essentially unchanged. Concurrently, Pb-J formation correlated with the partial formation of hydronium jarosite (H-J). The production of jarosite was inhibited when the solution pH was ~ 0.3 or lower. Furthermore, the increase in Fe<sup>3+</sup> concentration facilitated Pb-J formation, whereas Na<sub>2</sub>SO<sub>4</sub> and K<sub>2</sub>SO<sub>4</sub> inhibited Pb-J formation, leading to the formation of potassium jarosite (K-J) and sodium jarosite (Na-J), respectively. This study provided insights into regulating PbSO<sub>4</sub> conversion during sulfide ore oxygen pressure leaching.\",\"PeriodicalId\":361,\"journal\":{\"name\":\"Journal of Hazardous Materials\",\"volume\":\"229 1\",\"pages\":\"\"},\"PeriodicalIF\":12.2000,\"publicationDate\":\"2024-11-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Hazardous Materials\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1016/j.jhazmat.2024.136577\",\"RegionNum\":1,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Hazardous Materials","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.jhazmat.2024.136577","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
Phase conversion characteristics of lead sulfate in ferric sulfate medium
The phase transformation characteristics of lead sulfate (PbSO4) in a sulfuric acid (H2SO4) system were studied, focusing on the effects of temperature, H2SO4 concentration, ferric iron (Fe3+) concentration, sodium sulfate (Na2SO4), and potassium sulfate (K2SO4). The conversion of PbSO4 was analyzed by characterizing the composition and structure of the solid product through XRD, SEM/BSE-EDS, and FT-IR. The results indicated that the effect of temperature on PbSO4 transformation was influenced by H2SO4 concentration. The temperature threshold for PbSO4 conversion to lead jarosite (Pb-J) decreased from 150 to 90℃ as H2SO4 concentration decreased from 20 to 5 g/L. At 150℃, the amount of jarosite generated decreased significantly from 86.04 to 9.76%. Subsequently, when H2SO4 concentration exceeded 40 g/L, PbSO4 was essentially unchanged. Concurrently, Pb-J formation correlated with the partial formation of hydronium jarosite (H-J). The production of jarosite was inhibited when the solution pH was ~ 0.3 or lower. Furthermore, the increase in Fe3+ concentration facilitated Pb-J formation, whereas Na2SO4 and K2SO4 inhibited Pb-J formation, leading to the formation of potassium jarosite (K-J) and sodium jarosite (Na-J), respectively. This study provided insights into regulating PbSO4 conversion during sulfide ore oxygen pressure leaching.
期刊介绍：
The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.
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