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改性沸石吸附柱去除氨氮的研究畢業(yè)論文-展示頁

2024-09-07 13:49本頁面
  

【正文】 ............................................................... 8 沸石的用途 .................................................................................................................................................. 9 沸石改性的方法 ........................................................................................................................................ 10 沸石在水處理中的應(yīng)用研究 ............................................................................................... 12 沸石在水處理中的應(yīng)用 ............................................................................................................................. 12 沸石的應(yīng)用前景 ........................................................................................................................................ 16 沸石的應(yīng)用中存在的問題 ......................................................................................................................... 17 ................................................................................................... 17 .......................................................................................................... 19 實驗研究內(nèi)容 ............................................................................................................................................ 19 實驗的技術(shù)路線 ........................................................................................................................................ 19 ................................................................................................................. 19 實驗材料 ................................................................................................................................................... 19 實驗藥 品 .................................................................................................................................................. 19 實驗儀器及設(shè)備 ..................................................................................................................................... 20 實驗方法 .................................................................................................................................................. 20 3 實驗結(jié)果與分析 ............................................................................................................................................................. 21 ..................................................................................................................... 21 氨標(biāo)準(zhǔn)適用溶液 ....................................................................................................................................... 21 校準(zhǔn)曲線的繪制 ...................................................................................................................................... 21 水樣的測定 ................................................................................................................................................ 21 沸石最佳改性條件的確定 .................................................................................................. 22 沸石吸附氨氮的機理 ............................................................................................................................... 22 沸石最佳改性條件的確定 … …………………………………………………………… 3. 3 改性沸石吸附柱去除氨氮的研究 ..................................................................................... 25 3. 動態(tài)吸附實驗 ........................................................................................................................................ 25 3. 結(jié)果與討論 .............................................................................................................................................. 26 ................................................................................................................................... 31 蘭州理工大學(xué)石油化工學(xué)院畢業(yè)設(shè)計( 論文 ) 2 4 誤差分析與展望 ................................................................................................................................................................. 32 總 結(jié) ............................................................................................................................................................................... 33 參考文獻(xiàn) ............................................................................................................................................................................... 34 英文文獻(xiàn)原文 …………………………………………………………………………………………………… 英文文獻(xiàn)譯文 ………………………………………………………………………………………………… 致謝 ………………………………………………………………………………………………………… . 蘭州理工大學(xué)石油化工學(xué)院畢業(yè)設(shè)計( 論文 ) 1 1 緒 論 水體 中氨氮 污染現(xiàn)狀 概況 水體中氨氮 污染 的 現(xiàn)狀 水是最豐富而分布又最廣泛的自然資源 ,它在國民經(jīng)濟中 占有重要的地位,優(yōu)質(zhì)清潔的水源是人類生存和發(fā)展的基礎(chǔ)。In contrast to , removal rate of ammonia nitrogen increases by 8%。 At first the natural zeolite was modified by chemical approaches in the research,and choose the best modifying condition of study its treatment effect of low concentration NH4+in column reactor and draw breakthrough curve, investigating such factors as pellet size, velocity of flow and nitial ammonia concentration etc. The main results of this research were as follows:Ⅰ Under these circumstances:,c=3mol/l,T=70~ 75℃ ,the modification time3hours,we can get the the right modified zeolite。 After natural zeolite is modified quality score of silicon significantly reduces, And quality score of Sodium increases。 沸石粒徑在 ; ④ 入水流速越小,改性沸石對氨氮的去除率越高 ; ⑤ 廢水的初始濃度越低,改性沸石對氨氮的去除率越高 。通過研 究,本文得出了以下結(jié)論:①沸石改性的最佳條件為: NaCl 溶液濃度 3mol/L,水浴溫度 70~ 75℃,時間 3h; ② NaCl 改性沸石的去除率明顯高于未改性的。天然沸石在改性過程中 , 硅的質(zhì)量分?jǐn)?shù)顯著減少,而鈉的質(zhì)量分?jǐn)?shù)增多 . 這樣 有利于NH4+N的交換反應(yīng) ,因此改性沸石對氨氮的吸附 NH4+N的性能加強。蘭州理工大學(xué)石油化工學(xué)院畢業(yè)設(shè)計( 論文 ) I 摘 要 氨氮是引起水體富營養(yǎng)化和環(huán)境污染的重要物質(zhì), 采用沸石去除水中氨氮是水污染控制領(lǐng)域的研究熱點之一。沸石是一種廉價的非金屬礦物,具有獨特的吸附和離子交換性能。 本研究首先對天然沸石進行了改性, 確定了最佳的改性條件,并通過采用動態(tài)法研究改性沸石吸附柱去除微污染水源中氨氮的規(guī)律,包括改性沸石的粒徑大小、入水流速、初始氨濃度等參數(shù)的影響,繪制穿透曲線 。相比之下對氨氮的去除率增加了 8%;③ 沸石粒徑越小,去除率越高,改性效果越好 。 最高可到達(dá) 74%. 關(guān)鍵詞 :改性沸石 氯化鈉 氨氮 吸附
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