Influence of Synthesis Temperature on Phosphate Adsorption by Zn-Al Layered Double Hydroxides in Excess Sludge Liquor
A group of Zn-Al layered double hydroxides（LDHs）were synthesized at different temperatures from 25–90°C in order to investigate the influence of synthesis temperature on characteristics of the LDHs and their phosphate adsorption behaviour.The results reveal that an increase in the synthesis temperat...
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| Veröffentlicht in: | Chinese journal of chemical engineering 2011-06, Vol.19 (3), p.391-396 |
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| creator | 程翔 叶杰旭 孙德智 陈爱燕 |
| description | A group of Zn-Al layered double hydroxides（LDHs）were synthesized at different temperatures from 25–90°C in order to investigate the influence of synthesis temperature on characteristics of the LDHs and their phosphate adsorption behaviour.The results reveal that an increase in the synthesis temperature generally improves the specific surface area of the sample and the phosphate adsorption capacity.The significantly enhanced crystallinity of the Zn-Al-30,synthesized at 30°C,leads to a remarkable decrease in the specific surface area and conse- quently a poor phosphate adsorption capacity.It is suggested that the surface adsorption plays an important role in the phosphate uptake by the Zn-Al LDHs.Zn-Al-70 presents a relatively higher crystallinity and a lower specific surface area,compared with Zn-Al-60 and Zn-Al-80,but the highest phosphate adsorption capacity,indicating that surface adsorption is only one of the pathways for phosphate removal.The phosphate adsorption by the Zn-Al follows a pseudo-second-order kinetic equation.The adsorption isotherms fit Langmuir models,and the maximum adsorption capacities of the Zn-Al-25,Zn-Al-50 and Zn-Al-70 are estimated to be 17.82,21.01 and 27.10 mg·g -1 adsorbent,respectively. |
| doi_str_mv | 10.1016/S1004-9541(09)60226-3 |
| format | Article |
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and conse- quently a poor phosphate adsorption capacity.It is suggested that the surface adsorption plays an important role in the phosphate uptake by the Zn-Al LDHs.Zn-Al-70 presents a relatively higher crystallinity and a lower specific surface area,compared with Zn-Al-60 and Zn-Al-80,but the highest phosphate adsorption capacity,indicating that surface adsorption is only one of the pathways for phosphate removal.The phosphate adsorption by the Zn-Al follows a pseudo-second-order kinetic equation.The adsorption isotherms fit Langmuir models,and the maximum adsorption capacities of the Zn-Al-25,Zn-Al-50 and Zn-Al-70 are estimated to be 17.82,21.01 and 27.10 mg·g -1 adsorbent,respectively.</description><identifier>ISSN: 1004-9541</identifier><identifier>EISSN: 2210-321X</identifier><identifier>DOI: 10.1016/S1004-9541(09)60226-3</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Adsorption ; Crystallinity ; excess sludge liquor ; Hydroxides ; Langmuir ; layered double hydroxides ; phosphate adsorption ; Phosphates ; Specific surface ; Surface chemistry ; Synthesis ; synthesis temperature ; Zinc ; 剩余污泥 ; 合成温度 ; 吸收 ; 吸附能力 ; 层状双金属氢氧化物 ; 磷酸盐吸附 ; 锌铝</subject><ispartof>Chinese journal of chemical engineering, 2011-06, Vol.19 (3), p.391-396</ispartof><rights>2011 Chemical Industry and Engineering Society of China (CIESC) and Chemical Industry Press 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Zn-Al layered double hydroxides（LDHs）were synthesized at different temperatures from 25–90°C in order to investigate the influence of synthesis temperature on characteristics of the LDHs and their phosphate adsorption behaviour.The results reveal that an increase in the synthesis temperature generally improves the specific surface area of the sample and the phosphate adsorption capacity.The significantly enhanced crystallinity of the Zn-Al-30,synthesized at 30°C,leads to a remarkable decrease in the specific surface area and conse- quently a poor phosphate adsorption capacity.It is suggested that the surface adsorption plays an important role in the phosphate uptake by the Zn-Al LDHs.Zn-Al-70 presents a relatively higher crystallinity and a lower specific surface area,compared with Zn-Al-60 and Zn-Al-80,but the highest phosphate adsorption capacity,indicating that surface adsorption is only one of the pathways for phosphate removal.The phosphate adsorption by the Zn-Al follows a pseudo-second-order kinetic equation.The adsorption isotherms fit Langmuir models,and the maximum adsorption capacities of the Zn-Al-25,Zn-Al-50 and Zn-Al-70 are estimated to be 17.82,21.01 and 27.10 mg·g -1 adsorbent,respectively.</description><subject>Adsorption</subject><subject>Crystallinity</subject><subject>excess sludge liquor</subject><subject>Hydroxides</subject><subject>Langmuir</subject><subject>layered double hydroxides</subject><subject>phosphate adsorption</subject><subject>Phosphates</subject><subject>Specific surface</subject><subject>Surface chemistry</subject><subject>Synthesis</subject><subject>synthesis temperature</subject><subject>Zinc</subject><subject>剩余污泥</subject><subject>合成温度</subject><subject>吸收</subject><subject>吸附能力</subject><subject>层状双金属氢氧化物</subject><subject>磷酸盐吸附</subject><subject>锌铝</subject><issn>1004-9541</issn><issn>2210-321X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqFkU9r3DAQxUVJIZs0HyGgnpoe3OqPZVunsCRpE1hIYBMIuQitNNpV8UpeyS7xt683G3LtaWDem3nMbxA6p-QHJbT6uaSElIUUJb0g8ntFGKsK_gnNGKOk4Iw-H6HZh-UYneT8hxBGGtrM0HAXXDtAMICjw8sx9BvIPuNH2HaQdD-kSQj4YRNzt9E94LnNMXW9n5qrEb-EYt7ihR4hgcXXcVi1gG9Hm-Krt5CxD_jm1UDOeNkOdg144XdDTF_QZ6fbDGfv9RQ9_bp5vLotFve_767mi8Lwqu4LV9emYoYIIjkzVjdOaGlrLgDKRpROWuBSi7q02lV25VbOCsuaspYwaZTxU_TtsLdLcTdA7tXWZwNtqwPEISs54ZNCknJyioPTpJhzAqe65Lc6jYoStaes3iirPUJFpHqjrPg0d3mYg-mMvx6SysbvcVqfwPTKRv_fDV_fkzcxrHc-rD-iecPl9KWK_wNw9pF-</recordid><startdate>20110601</startdate><enddate>20110601</enddate><creator>程翔 叶杰旭 孙德智 陈爱燕</creator><general>Elsevier B.V</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20110601</creationdate><title>Influence of Synthesis Temperature on Phosphate Adsorption by Zn-Al Layered Double Hydroxides in Excess Sludge Liquor</title><author>程翔 叶杰旭 孙德智 陈爱燕</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c367t-f77c62c050932cda8f5a9d735ee4854f9de39a574daf6dbfbfd5d28479ef9d123</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Adsorption</topic><topic>Crystallinity</topic><topic>excess sludge liquor</topic><topic>Hydroxides</topic><topic>Langmuir</topic><topic>layered double hydroxides</topic><topic>phosphate adsorption</topic><topic>Phosphates</topic><topic>Specific surface</topic><topic>Surface chemistry</topic><topic>Synthesis</topic><topic>synthesis temperature</topic><topic>Zinc</topic><topic>剩余污泥</topic><topic>合成温度</topic><topic>吸收</topic><topic>吸附能力</topic><topic>层状双金属氢氧化物</topic><topic>磷酸盐吸附</topic><topic>锌铝</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>程翔 叶杰旭 孙德智 陈爱燕</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Chinese journal of chemical engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>程翔 叶杰旭 孙德智 陈爱燕</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of Synthesis Temperature on Phosphate Adsorption by Zn-Al Layered Double Hydroxides in Excess Sludge Liquor</atitle><jtitle>Chinese journal of chemical engineering</jtitle><addtitle>Chinese Journal of Chemical Engineering</addtitle><date>2011-06-01</date><risdate>2011</risdate><volume>19</volume><issue>3</issue><spage>391</spage><epage>396</epage><pages>391-396</pages><issn>1004-9541</issn><eissn>2210-321X</eissn><abstract>A group of Zn-Al layered double hydroxides（LDHs）were synthesized at different temperatures from 25–90°C in order to investigate the influence of synthesis temperature on characteristics of the LDHs and their phosphate adsorption behaviour.The results reveal that an increase in the synthesis temperature generally improves the specific surface area of the sample and the phosphate adsorption capacity.The significantly enhanced crystallinity of the Zn-Al-30,synthesized at 30°C,leads to a remarkable decrease in the specific surface area and conse- quently a poor phosphate adsorption capacity.It is suggested that the surface adsorption plays an important role in the phosphate uptake by the Zn-Al LDHs.Zn-Al-70 presents a relatively higher crystallinity and a lower specific surface area,compared with Zn-Al-60 and Zn-Al-80,but the highest phosphate adsorption capacity,indicating that surface adsorption is only one of the pathways for phosphate removal.The phosphate adsorption by the Zn-Al follows a pseudo-second-order kinetic equation.The adsorption isotherms fit Langmuir models,and the maximum adsorption capacities of the Zn-Al-25,Zn-Al-50 and Zn-Al-70 are estimated to be 17.82,21.01 and 27.10 mg·g -1 adsorbent,respectively.</abstract><pub>Elsevier B.V</pub><doi>10.1016/S1004-9541(09)60226-3</doi><tpages>6</tpages></addata></record> |
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| identifier | ISSN: 1004-9541 |
| ispartof | Chinese journal of chemical engineering, 2011-06, Vol.19 (3), p.391-396 |
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| language | eng |
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| source | ScienceDirect Journals (5 years ago - present); Alma/SFX Local Collection |
| subjects | Adsorption Crystallinity excess sludge liquor Hydroxides Langmuir layered double hydroxides phosphate adsorption Phosphates Specific surface Surface chemistry Synthesis synthesis temperature Zinc 剩余污泥 合成温度 吸收 吸附能力 层状双金属氢氧化物 磷酸盐吸附 锌铝 |
| title | Influence of Synthesis Temperature on Phosphate Adsorption by Zn-Al Layered Double Hydroxides in Excess Sludge Liquor |
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