REMOVAL OF N-NITROSODIMETHYLAMINE (NDMA) BY MODIFIED MAGNETIC PARTICLE

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Title:	REMOVAL OF N-NITROSODIMETHYLAMINE (NDMA) BY MODIFIED MAGNETIC PARTICLE
Authors:	PINKY JOY ANINIPOT JANABAN
Contributors:	環境資源管理系甘其銓
Keywords:	吸附產品消毒 H-ZSM-5 磁性粒子 N-亞硝基二甲胺 Adsorption Disinfection-By-Products H-ZSM-5 Magnetic Particle N-nitrosodimethylamine
Date:	2017
Issue Date:	2018-01-11 11:43:05 (UTC+8)
Abstract:	N-亞硝基二甲胺(N-nitrosodimethylamine, NDMA)是一種致癌與親水性之化合物，因其對人類健康與環境具有害影響，故已研究近半個世紀。然而，最近這種污染物在飲用水處理廠(Drinking Water Treatment Plants, DWTP)中，當鹽酸離子(Cl-)與地表水中微量碳和亞硝基化合物之氯化過程結合時，無法避免地形成。因此，針對這一問題，本研究通過一種新穎之吸附劑，研究了NDMA之吸附，可以很容易地從設備系統中去除。其中，這項工作已經成功地將磁性顆粒改造成為吸附NDMA之Fe2O3@H-ZSM-5。並且具有去除NDMA之百分比；吸附劑負載0.1克在2ppm與5ppm時, 其去除效率分別為32.5%與33.4%。當吸附劑之負載量增加到0.5g，在2ppm與5ppm時其除去百分比也分別增加到50.5%和48.8%。本吸附劑之結構表徵使用SEM及XRD分析，與文獻相比，證實存在結晶產物。 N-nitrosodimethylamine (NDMA) is a carcinogenic and hydrophilic compound that has been investigated for almost half a century because of its harmful effects to human health and to the environment. However, this kind of contaminant has recently been observed to form inevitably during the chlorination in Drinking Water Treatment Plants (DWTP) when a hypochlorite ion (ClO-) bonded with trace amounts of carbon and nitrous compound present in surface water. Hence, in response to this problem, the study investigated the adsorption of NDMA by a novel adsorbent that can be easily remove from the facility’s system. In which, this work has successfully modified the magnetic particle into Fe2O3@HZSM5 that adsorbs NDMA. The percent removal of NDMA, at 0.1 g loading of adsorbent for 2ppm and 5ppm is 32.5% and 33.4%, respectively. And when the loading of adsorbent increases to 0.5g the percent removal also increases to 50.5% and 48.8% at 2ppm and 5ppm, respectively. This adsorbent was structurally characterized using SEM and XRD analyses, confirming the existence of crystalline products in comparison with literature works.
Relation:	電子全文不公開，學年度：105，75頁
Appears in Collections:	[Dept. of Environmental Resources Management] Dissertations and Theses

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