Article(id=1236330612429214661, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236330603000418795, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2023.04.028, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1677513600000, receivedDateStr=2023-02-28, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772693787914, onlineDateStr=2026-03-05, pubDate=1690819200000, pubDateStr=2023-08-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772693787914, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772693787914, creator=13701087609, updateTime=1772693787914, updator=13701087609, issue=Issue{id=1236330603000418795, tenantId=1146029695717560320, journalId=1235980550691926019, year='2023', volume='43', issue='4', pageStart='1', pageEnd='189', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772693785667, creator=13701087609, updateTime=1772696855253, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236343477835985022, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236330603000418795, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236343477835985023, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236330603000418795, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=131, endPage=134, ext={EN=ArticleExt(id=1236330612756370399, articleId=1236330612429214661, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Preparation of Calcined Calcium Aluminum Hydrotalcite and Its Adsorption Performance for Fluorine, columnId=1236276106727321817, journalTitle=Mining and Metallurgical Engineering, columnName=METALLURGY, runingTitle=null, highlight=null, articleAbstract=
With Ca (NO3)2·4H2O and Al (NO3)3·9H2O as raw materials and urea as precipitant, a precursor Ca-Al-LDHs was prepared by microwave heating and hydrothermal synthesis. A product of Ca-Al hydrotalcite (Ca-Al-LDOs) was obtained after roasting, and it was used to adsorb fluorine in wastewater. It is found that Ca-Al-LDOs are of typical layered structure similar to hydrotalcite. With pH of 2, initial concentration of F- ion at 500 mg/g, adsorbent dosage of 2.5 g/L and reaction time of 180 min, the adsorption capacity reaches 173.9 mg/g and the removal rate of fluorine reaches 92.01%. It is found that the process of adsorption conforms to the Freundlich adsorption isotherm mode, and its kinetics conforms to the quasi-second-order kinetic model. The adsorbent Ca-Al-LDOs can be reused after desorption, with defluorination rate keeping at 68.92% after 8 cycles of regeneration.
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以四水硝酸钙和九水硝酸铝为原料、尿素为沉淀剂,利用微波加热、水热合成法制备了前驱体Ca-Al-LDHs,焙烧后得到钙铝类水滑石(Ca-Al-LDOs),并将其用于吸附废水中氟离子。结果表明,Ca-Al-LDOs具有明显的类水滑石层状结构;吸附材料在pH=2、F-初始浓度500 mg/g、吸附时间180 min、吸附剂添加量2.5 g/L条件下,吸附容量达到173.9 mg/g,氟去除率达到92.01%;其吸附行为符合Freundlich等温吸附模型和准二级动力学方程;吸附剂经脱附溶液处理后可再生重复利用,8次循环再生后,除氟率依旧能达到68.92%。
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颜文斌(1965—),男,湖南邵阳人,教授,博士,硕士研究生导师,主要研究方向为无机材料。
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肖佳俊(1999—),男,湖南娄底人,硕士研究生,主要研究方向为无机材料。
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肖佳俊(1999—),男,湖南娄底人,硕士研究生,主要研究方向为无机材料。
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肖佳俊(1999—),男,湖南娄底人,硕士研究生,主要研究方向为无机材料。
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