Effect of Al(III) speciation on coagulation of highly turbid water
In Taiwan, the turbidity of raw water for fresh water treatments can sometimes reach as high as 40 000 NTU due to intensive rainfall, especially in typhoon seasons. In response, water works often apply large quantities of coagulants such as polyaluminium chloride (PACl). In this study, simulated and...
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| Veröffentlicht in: | Chemosphere (Oxford) 2008-05, Vol.72 (2), p.189-196 |
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| creator | Lin, Jr-Lin Huang, Chihpin Pan, Jill Ruhsing Wang, Dongsheng |
| description | In Taiwan, the turbidity of raw water for fresh water treatments can sometimes reach as high as 40
000 NTU due to intensive rainfall, especially in typhoon seasons. In response, water works often apply large quantities of coagulants such as polyaluminium chloride (PACl). In this study, simulated and natural highly turbid water was coagulated with two PACls, a commercial product (PACl-1) and a laboratory product (PACl-E). The Al species distributions of PACl-1 and PACl-E under various pH conditions were determined, and the corresponding coagulation efficiency was evaluated. The PACl-E has a wider range of operational pH, while the efficiency of PACl-1 peaks at around neutral pH. For simulated water up to 5000 NTU, the PACl-E was superior to PACl-1 at low dosage and in the pH range studied. Similar results were discovered with natural water, except that when the turbidity was extremely high, the coagulation efficiency of PACl-E decreased significantly due to the presence of large amounts of organic matter. The coagulation of PACl-E was closely related to the content of polycationic aluminium (Al
13) while that of PACl-1 was dictated by the amount of Al
c. The sludge from PACl-E coagulation had better dewaterability when the optimum dosage was applied. The experimental results suggest that for natural water up to 5000 NTU, PACl containing high Al
13 species is recommended for coagulation. In cases when the water contains high organic matter, efficient coagulation depends upon enmeshment by amorphous aluminium hydroxide. |
| doi_str_mv | 10.1016/j.chemosphere.2008.01.062 |
| format | Article |
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000 NTU due to intensive rainfall, especially in typhoon seasons. In response, water works often apply large quantities of coagulants such as polyaluminium chloride (PACl). In this study, simulated and natural highly turbid water was coagulated with two PACls, a commercial product (PACl-1) and a laboratory product (PACl-E). The Al species distributions of PACl-1 and PACl-E under various pH conditions were determined, and the corresponding coagulation efficiency was evaluated. The PACl-E has a wider range of operational pH, while the efficiency of PACl-1 peaks at around neutral pH. For simulated water up to 5000 NTU, the PACl-E was superior to PACl-1 at low dosage and in the pH range studied. Similar results were discovered with natural water, except that when the turbidity was extremely high, the coagulation efficiency of PACl-E decreased significantly due to the presence of large amounts of organic matter. The coagulation of PACl-E was closely related to the content of polycationic aluminium (Al
13) while that of PACl-1 was dictated by the amount of Al
c. The sludge from PACl-E coagulation had better dewaterability when the optimum dosage was applied. The experimental results suggest that for natural water up to 5000 NTU, PACl containing high Al
13 species is recommended for coagulation. In cases when the water contains high organic matter, efficient coagulation depends upon enmeshment by amorphous aluminium hydroxide.</description><identifier>ISSN: 0045-6535</identifier><identifier>EISSN: 1879-1298</identifier><identifier>DOI: 10.1016/j.chemosphere.2008.01.062</identifier><identifier>PMID: 18331755</identifier><identifier>CODEN: CMSHAF</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Aluminium speciation ; Aluminum - chemistry ; Aluminum Hydroxide - chemistry ; Applied sciences ; Coagulation ; Drinking water and swimming-pool water. Desalination ; Exact sciences and technology ; Hydrogen-Ion Concentration ; Magnetic Resonance Spectroscopy ; Pollution ; Polyaluminium chloride ; Turbidity ; Water Purification - methods ; Water treatment and pollution</subject><ispartof>Chemosphere (Oxford), 2008-05, Vol.72 (2), p.189-196</ispartof><rights>2008 Elsevier Ltd</rights><rights>2008 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c584t-e5ef33e337bb12945b3bac77deb9f97b54c016786202951424c411cc64c23c293</citedby><cites>FETCH-LOGICAL-c584t-e5ef33e337bb12945b3bac77deb9f97b54c016786202951424c411cc64c23c293</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.chemosphere.2008.01.062$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20369462$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18331755$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lin, Jr-Lin</creatorcontrib><creatorcontrib>Huang, Chihpin</creatorcontrib><creatorcontrib>Pan, Jill Ruhsing</creatorcontrib><creatorcontrib>Wang, Dongsheng</creatorcontrib><title>Effect of Al(III) speciation on coagulation of highly turbid water</title><title>Chemosphere (Oxford)</title><addtitle>Chemosphere</addtitle><description>In Taiwan, the turbidity of raw water for fresh water treatments can sometimes reach as high as 40
000 NTU due to intensive rainfall, especially in typhoon seasons. In response, water works often apply large quantities of coagulants such as polyaluminium chloride (PACl). In this study, simulated and natural highly turbid water was coagulated with two PACls, a commercial product (PACl-1) and a laboratory product (PACl-E). The Al species distributions of PACl-1 and PACl-E under various pH conditions were determined, and the corresponding coagulation efficiency was evaluated. The PACl-E has a wider range of operational pH, while the efficiency of PACl-1 peaks at around neutral pH. For simulated water up to 5000 NTU, the PACl-E was superior to PACl-1 at low dosage and in the pH range studied. Similar results were discovered with natural water, except that when the turbidity was extremely high, the coagulation efficiency of PACl-E decreased significantly due to the presence of large amounts of organic matter. The coagulation of PACl-E was closely related to the content of polycationic aluminium (Al
13) while that of PACl-1 was dictated by the amount of Al
c. The sludge from PACl-E coagulation had better dewaterability when the optimum dosage was applied. The experimental results suggest that for natural water up to 5000 NTU, PACl containing high Al
13 species is recommended for coagulation. In cases when the water contains high organic matter, efficient coagulation depends upon enmeshment by amorphous aluminium hydroxide.</description><subject>Aluminium speciation</subject><subject>Aluminum - chemistry</subject><subject>Aluminum Hydroxide - chemistry</subject><subject>Applied sciences</subject><subject>Coagulation</subject><subject>Drinking water and swimming-pool water. Desalination</subject><subject>Exact sciences and technology</subject><subject>Hydrogen-Ion Concentration</subject><subject>Magnetic Resonance Spectroscopy</subject><subject>Pollution</subject><subject>Polyaluminium chloride</subject><subject>Turbidity</subject><subject>Water Purification - methods</subject><subject>Water treatment and pollution</subject><issn>0045-6535</issn><issn>1879-1298</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkV2L1DAUhoMo7uzqX5B6oawXrflskst1WHVgwRu9DunpyU6GznRMWmX_vRmnqHcrBELgeU_e5CHkNaMNo6x9v2tgi_sxH7eYsOGUmoayhrb8CVkxo23NuDVPyYpSqepWCXVBLnPeUVrCyj4nF8wIwbRSK_LhNgSEqRpDdTNcbzabd1U-IkQ_xfFQlQWjv5-H5RiqbbzfDg_VNKcu9tVPP2F6QZ4FP2R8uexX5NvH26_rz_Xdl0-b9c1dDcrIqUaFQQgUQndd6SdVJzoPWvfY2WB1pySUetq0nHKrmOQSJGMArQQugFtxRd6e5x7T-H3GPLl9zIDD4A84ztm1llNhxOMgp8YKQemjIJOm1VqdJtozCGnMOWFwxxT3Pj04Rt1Jidu5f5S4kxJHmStKSvbVcsnc7bH_m1wcFODNAvgMfgjJHyDmP1x5VGvl70HrM4flk39ETC5DxANgH1NR6Pox_kedX6T_ras</recordid><startdate>20080501</startdate><enddate>20080501</enddate><creator>Lin, Jr-Lin</creator><creator>Huang, Chihpin</creator><creator>Pan, Jill Ruhsing</creator><creator>Wang, Dongsheng</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7TV</scope><scope>7X8</scope></search><sort><creationdate>20080501</creationdate><title>Effect of Al(III) speciation on coagulation of highly turbid water</title><author>Lin, Jr-Lin ; Huang, Chihpin ; Pan, Jill Ruhsing ; Wang, Dongsheng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c584t-e5ef33e337bb12945b3bac77deb9f97b54c016786202951424c411cc64c23c293</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Aluminium speciation</topic><topic>Aluminum - chemistry</topic><topic>Aluminum Hydroxide - chemistry</topic><topic>Applied sciences</topic><topic>Coagulation</topic><topic>Drinking water and swimming-pool water. Desalination</topic><topic>Exact sciences and technology</topic><topic>Hydrogen-Ion Concentration</topic><topic>Magnetic Resonance Spectroscopy</topic><topic>Pollution</topic><topic>Polyaluminium chloride</topic><topic>Turbidity</topic><topic>Water Purification - methods</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lin, Jr-Lin</creatorcontrib><creatorcontrib>Huang, Chihpin</creatorcontrib><creatorcontrib>Pan, Jill Ruhsing</creatorcontrib><creatorcontrib>Wang, Dongsheng</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Chemosphere (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lin, Jr-Lin</au><au>Huang, Chihpin</au><au>Pan, Jill Ruhsing</au><au>Wang, Dongsheng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Al(III) speciation on coagulation of highly turbid water</atitle><jtitle>Chemosphere (Oxford)</jtitle><addtitle>Chemosphere</addtitle><date>2008-05-01</date><risdate>2008</risdate><volume>72</volume><issue>2</issue><spage>189</spage><epage>196</epage><pages>189-196</pages><issn>0045-6535</issn><eissn>1879-1298</eissn><coden>CMSHAF</coden><abstract>In Taiwan, the turbidity of raw water for fresh water treatments can sometimes reach as high as 40
000 NTU due to intensive rainfall, especially in typhoon seasons. In response, water works often apply large quantities of coagulants such as polyaluminium chloride (PACl). In this study, simulated and natural highly turbid water was coagulated with two PACls, a commercial product (PACl-1) and a laboratory product (PACl-E). The Al species distributions of PACl-1 and PACl-E under various pH conditions were determined, and the corresponding coagulation efficiency was evaluated. The PACl-E has a wider range of operational pH, while the efficiency of PACl-1 peaks at around neutral pH. For simulated water up to 5000 NTU, the PACl-E was superior to PACl-1 at low dosage and in the pH range studied. Similar results were discovered with natural water, except that when the turbidity was extremely high, the coagulation efficiency of PACl-E decreased significantly due to the presence of large amounts of organic matter. The coagulation of PACl-E was closely related to the content of polycationic aluminium (Al
13) while that of PACl-1 was dictated by the amount of Al
c. The sludge from PACl-E coagulation had better dewaterability when the optimum dosage was applied. The experimental results suggest that for natural water up to 5000 NTU, PACl containing high Al
13 species is recommended for coagulation. In cases when the water contains high organic matter, efficient coagulation depends upon enmeshment by amorphous aluminium hydroxide.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><pmid>18331755</pmid><doi>10.1016/j.chemosphere.2008.01.062</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Aluminium speciation Aluminum - chemistry Aluminum Hydroxide - chemistry Applied sciences Coagulation Drinking water and swimming-pool water. Desalination Exact sciences and technology Hydrogen-Ion Concentration Magnetic Resonance Spectroscopy Pollution Polyaluminium chloride Turbidity Water Purification - methods Water treatment and pollution |
| title | Effect of Al(III) speciation on coagulation of highly turbid water |
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