Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/27587
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dc.contributor.advisor王尚禮zh_TW
dc.contributor.author鄭佳怡zh_TW
dc.contributor.authorCheng, Chia-Yien_US
dc.contributor.other中興大學zh_TW
dc.date2007zh_TW
dc.date.accessioned2014-06-06T07:28:21Z-
dc.date.available2014-06-06T07:28:21Z-
dc.identifier.urihttp://hdl.handle.net/11455/27587-
dc.description.abstractPhosphorus has been recognized as one of the main nutrients that cause eutrophication in surface water, so many technologies have been developed for phosphate removal from water. Adsorption is one of the major strategies for removing contaminants from water. In order to provide a cost-effective method for phosphate removal, it is essential to have a sorbent that can effectively immobilize phosphate. In this study, the sorption of orthophosphates was investigated for LiAl2(OH)6Cl•xH2O (Li/Al-LDH) which has high surface area and high anion exchange capacity (~4.5 mmol g-1). Sorption experiments were conducted at pH 4.5 and 9.5, at which the predominant species of phosphate are H2PO4- and HPO42-, respectively.In addition, the influence of pH, ion strength and competition ions on phosphate sorption was also investigated. The results showed that phosphates were sorbed by Li/Al LDH mainly through anion exchange at pH 4.5 and 9.5; under acidic condition (pH 4.5), the formations of surface complexes or surface precipitation of phosphate were also revealed by the results of 31P NMR. Competing anions strongly affected the adsorption behavior of phosphate with phosphate adsorption decreasing in the order: SO42->Cl- >Br->NO3- at pH 4.5. However, monovalent competing anions (Cl-、NO3- and Br-) had less influence on phosphate adsorption at pH 9.5.zh_TW
dc.description.abstract人類經濟與休閒活動,產生了許多含磷的廢水,這些廢水被排放至表面水體將造成藻類過量增生,並進一步導致水體的優養化。對於水體中的磷的移除,吸附法為最有效的方法之ㄧ。本研究使用的鋰/鋁-層狀雙氫氧化物(Li/Al Layered double hydroxide, Li/Al LDH)由於具有很高的比表面積與陰離子吸附容量(~4.5 mmol g-1),具有去除環境中磷的潛力。在本研究中將探討水體中的環境因子,包括pH、離子強度與水體中其他競爭陰離子,對Li/Al LDH吸附磷的影響,並結合X光繞射、傅立葉轉換紅外光譜與固態磷-31核磁共振等儀器的輔助,了解Li/Al LDH與磷溶液反應過後其結構所產生的變化,並探討主要的吸附機制。結果發現,在pH 4.5與pH 9.5的環境下,都是以離子交換為主要的反應機制,但是在pH 4.5的環境下還有表面錯合和沉澱反應的發生。在pH 4.5的環境下,競爭離子的親和力大小為SO42->Cl- >Br->NO3-,但是在pH 9.5的環境下,除了SO42-對磷吸附有顯著的抑制外,其於單價競爭陰離子的影響程度皆較小。zh_TW
dc.description.tableofcontents摘要 I Abstract II 目錄 IV 圖次 VII 壹、前言 1 貳、文獻回顧 3 (一) 形成優養化的原因 3 (二) 優養化產生的影響 4 (三) 含磷廢水處理 5 (四) 層狀雙氫氧化物的特性與應用 9 参、材料與方法 13 (一)樣品的合成與結構鑑定 13 (二)動力吸附實驗 13 1. pH值對Li/Al LDH吸附磷酸根離子的影響 13 2.固體濃度對Li/Al LDH吸附磷酸根離子的影響 15 3.不同起始濃度對Li/Al LDH吸附磷酸根離子的影響 16 (三)等溫吸附實驗 16 1.pH對吸附量的影響 16 2.固體濃度對吸附量的影響 17 (1)溶液配製 17 (2)吸附實驗 17 3.競爭陰離子對吸附量的影響 17 (四)測定方法與分析儀器 18 1.鉬藍法(Mobdenum blue method) 18 2.X光粉末繞射儀(X-ray Diffraction) 18 3.傅立葉轉換紅外光譜儀(FTIR) 18 4.固態P-31核磁共振光譜實驗(Solid State 31P-NMR) 19 肆、結果與討論 20 (一) Li/Al LDH基本特性分析 20 (二)動力學吸附實驗 23 1.pH值對Li/Al LDH吸附磷酸根離子的影響 23 2.固體濃度對Li/Al LDH吸附磷酸根離子的影響 25 3.不同起始濃度對Li/Al LDH吸附磷酸根離子的影響 29 (三)等溫吸附實驗 43 1.pH對吸附量的影響 43 2.固體濃度對吸附量的影響 48 3.競爭陰離子對吸附量的影響 53 伍、結論 58zh_TW
dc.language.isoen_USzh_TW
dc.publisher土壤環境科學系所zh_TW
dc.subjectsorptionen_US
dc.subject吸附zh_TW
dc.subjectanion exchangeen_US
dc.subjectphosphateen_US
dc.subjectlayered double hydroxideen_US
dc.subjecteutrophicationen_US
dc.subject離子交換zh_TW
dc.subject磷酸根離子zh_TW
dc.subject層狀雙氫氧化物zh_TW
dc.subject優養化zh_TW
dc.title利用層狀雙氫氧化物 (LiAl2(OH)6Cl•xH¬2O)自水中移除磷zh_TW
dc.titleRemoval of phosphate from water using Li/Al layered double hydroxideen_US
dc.typeThesis and Dissertationzh_TW
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.grantfulltextnone-
Appears in Collections:土壤環境科學系
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