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dc.contributor.authorLin, Jr-Linen_US
dc.contributor.authorHuang, Chihpinen_US
dc.contributor.authorPan, Jill Ruhsingen_US
dc.contributor.authorWang, Dongshengen_US
dc.date.accessioned2014-12-08T15:12:12Z-
dc.date.available2014-12-08T15:12:12Z-
dc.date.issued2008-05-01en_US
dc.identifier.issn0045-6535en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.chemosphere.2008.01.062en_US
dc.identifier.urihttp://hdl.handle.net/11536/9363-
dc.description.abstractIn Taiwan, the turbidity of raw water for fresh water treatments can sometimes reach as high as 40000 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, 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. (C) 2008 Elsevier Ltd. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectpolyaluminium chlorideen_US
dc.subjectaluminium speciationen_US
dc.subjectcoagulationen_US
dc.subjectturbidityen_US
dc.titleEffect of Al(III) speciation on coagulation of highly turbid wateren_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.chemosphere.2008.01.062en_US
dc.identifier.journalCHEMOSPHEREen_US
dc.citation.volume72en_US
dc.citation.issue2en_US
dc.citation.spage189en_US
dc.citation.epage196en_US
dc.contributor.department環境工程研究所zh_TW
dc.contributor.departmentInstitute of Environmental Engineeringen_US
dc.identifier.wosnumberWOS:000256737900008-
dc.citation.woscount34-
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