摘　要：氨氮是指水中以游離氨（NH3）和銨離子（NH4+）形式存在的氮。實(shí)驗(yàn)研究了人造沸石對(duì)低濃度氨氮的吸附行為,考察了沸石投加量、溫度、吸附時(shí)間、氨氮濃度、溶液pH 值以及Ca2+ 、Mg2+ 競(jìng)爭(zhēng)陽(yáng)離子對(duì)人造沸石吸附低濃度氨氮的影響。結(jié)果表明,在投加1.174 g/ 50mL 的人造沸石,pH 值為6 ,溫度為25 ℃, 吸附時(shí)間為40min的條件下,絲光沸石對(duì)高濃度氨氮的去除率可達(dá)80%以上。Ca2+ 、Mg2+競(jìng)爭(zhēng)陽(yáng)離子在一定程度上抑制絲光沸石對(duì)氨氮的吸附。
關(guān)鍵詞：沸石 ；水 ；氨氮 ；吸附 ；氨氮




















Use zeolite adsorption of ammonia nitrogen in water

Abstract: Ammonia nitrogen refers to the water to free ammonia (NH3) and ammonium (NH4+) exists in the form of nitrogen. Experimental study the zeolite low concentration of ammonia nitrogen adsorption behavior, inspected the zeolite dosing quantity, temperature, time, ammonia nitrogen adsorption, the solution pH value and Ca2+ 、Mg2+ competition cationic for artificial zeolite adsorption effect of low concentration of ammonia nitrogen. The results showed that, in the dosing 1.174 g / 50mL man-made zeolite, pH value for 6, the temperature is 25℃, adsorption time for 40min conditions, to high concentrations of ammonia nitrogen silk zeolite had up to 80%. Ca2+ 、Mg2+ competition in a certain extent inhibit cationic silk zeolite of ammonia nitrogen adsorption.

Key words: Zeolite; Water; Ammonia nitrogen; Adsorption; Ammonia nitrogen


目 錄

1文獻(xiàn)綜述 1
1.1氨氮的基本概況 1
1.2氨氮誘發(fā)的危害 1
1.2.1水體富營(yíng)養(yǎng)化 1
1.2.2影響水質(zhì)及經(jīng)濟(jì)價(jià)值受損 2
1.2.3危害人類及生物生存 3
1.3水體中氮的重要來(lái)源 3
1.4我國(guó)氨氮廢水概況 3
1.5氨氮廢水處理方法 4
1.6沸石吸附法除去氨氮 5
1.6.1目前研究概況 5
1.6.2沸石去除氨氮的機(jī)理 5
1.6.2.1沸石的結(jié)構(gòu)特點(diǎn) 5
1.6.2.2沸石的高效吸附性能 6
1.6.2.3沸石的陽(yáng)離子交換性能 6
1.6.2.4沸石去除氨氮步驟 7
1.7沸石去除氨氮效果的影響因素 7
1.7.1沸石去除氨氮效果的影響因素 7
1.7.2接觸時(shí)間對(duì)去除氨氮的影響 7
1.7.3沸石粒徑對(duì)去除氨氮的影響 7
1.7.4 pH值對(duì)去除氨氮的影響 7
1.7.5干擾離子對(duì)去除氨氮的影響 8
1.8本課題的目的及內(nèi)容 8
2實(shí)驗(yàn)部分 9
2.1 實(shí)驗(yàn)藥品及裝置 9
2.1.1 實(shí)驗(yàn)藥品 9
2.1.2 實(shí)驗(yàn)裝置 10
2.1.3 實(shí)驗(yàn)方法 11
3 結(jié)果與討論 12
3.1沸石投加量對(duì)氨氮吸附的影響 12
3.2溫度對(duì)沸石吸附氨氮的影響 12
3.3時(shí)間對(duì)沸石吸附氨氮的影響 13
3.4 pH對(duì)沸石吸附氨氮的影響 14
3.5競(jìng)爭(zhēng)性陽(yáng)離子對(duì)沸石吸附氨氮的影響 15
4 結(jié)論 17
參考文獻(xiàn) 17
致謝 20