抗垢劑對逆滲透薄層複合膜抗垢性能之影響

Chia Nan University of Pharmacy & Science Institutional Repository > 環境永續暨休閒學院 > 環境工程與科學系(所) > 博碩士論文 > Item 310902800/30792

請使用永久網址來引用或連結此文件: https://ir.cnu.edu.tw/handle/310902800/30792

標題:	抗垢劑對逆滲透薄層複合膜抗垢性能之影響 Effect of Antiscalant Additive on the Fouling Problem of RO TFC Membranes
作者:	陳彥成
貢獻者:	環境工程與科學系陳世雄
關鍵字:	抗垢劑有機磷酸鹽薄層複合膜積垢 Antiscalant Phosphonate Thin Film Composite Fouling
日期:	2017
上傳時間:	2018-01-11 11:43:15 (UTC+8)
摘要:	使用抗垢劑降低表面積垢技術已被發展多年，應用於膜分離程序可解決薄膜因積垢導致透水量下降的問題，延長薄膜壽命。本研究目的針對煉鋼製程廢水純化過程薄結垢問題之解決，研究開發新型抗垢劑並探討其對逆滲透(RO)薄層複合膜抗垢性能之影響，抗垢劑以有機磷酸鹽(PBTC)為主，透過無機鹽類、螯合劑、界面活性劑及聚合物等物質的添加進行試驗，觀察逆滲透(RO)薄膜的透水量、接觸角及官能基鑑定以評估抗垢劑的抗垢性能。其結果顯示，在PBTC 2mg/L下，氯化鐵、氯化鋁、氯化鋅及矽酸鈉的額外增加，會因水中鹼度的影響形成沉澱物而改變薄膜表面的粗糙度；脂肪胺型界面活性劑會因吸附作用在薄膜表面產生有機性沉積；PEG 400合併PBTC與既有的水中溶解性蛋白質作用易產生沉澱物而改變薄膜表面的粗糙度；聚乙烯亞胺因帶強陽電性與水中有機性溶解物產生較小而結實的膠羽不易沉積。本實驗室所開發的抗垢劑F7配方中，有機磷酸鹽與廢水中的鈣離子形成高溶解性的Ca-phosphonate錯合物，聚氧乙烯型非離子界面活性劑中的氫鍵直接與疏水性物質作用，有效減緩RO薄膜表面上生物質量的累積，相較於G品牌其透水率則高於2%。 Antiscalant has been developed to reducing the fouling layer of water treatment processes for many years, major solving the fouling problem of membrane and extending the membrane life time. The purpose of this study is to synthesize new antiscalants for the purification of steel industrial wastewater and to explore the antifouling efficiency of antiscalant in the RO TFC process. Based on the phosphonate (PBTC), incorporate the inorganic, chelating agents, surfactants and polymers were testes by using the cross flow RO unit. The performance of antiscalants were evaluated by permeation flux, membrane contact angle and functional group of scaling layer on membranes. The results showed that at PBTC 2mg/L, feeding the ferric chloride, aluminum chloride, zinc chloride and sodium silicate to the steelmaking wastewater, forming precipitant which to alter the surface roughness of membrane due to the change of water alkalinity. The fatty amine surfactant produced organic fouling on membrane due to adsorption on the membrane surface. PEG 400 with PBTC reacted with the soluble protein produce precipitant which to alter the surface roughness of membrane and permeation flux. Polyethyleneimine has strong cationic charge, can with dissolved organic matter to form smaller floc and less deposition was observed on surface of membrane. Antiscalant F7 contained phosphonate and polyoxyethylene nonionic surfactant to form Ca-phosphonate complexes, it can provide a strong hydrogen bonding with organic material and effective decreased the accumulation of biomass on the surface of membrane. It was found that the permeation flux of the antiscalant F7 is higher than commercial antiscalant ( G company supplied) over 2% .
關聯:	電子全文公開日期：2022-07-13，學年度：105，102頁
顯示於類別:	[環境工程與科學系(所)] 博碩士論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	937	檢視/開啟

在CNU IR中所有的資料項目都受到原著作權保護.

TAIR相關文章

資料載入中.....