本文關(guān)鍵詞： 碘代消毒副產(chǎn)物 中壓 紫外輻照 氯胺化　出處：《中國環(huán)境科學》2017年02期 　論文類型：期刊論文

【摘要】：以碘酸根為研究對象,研究中壓紫外對碘酸根的降解速率,天然有機物及共存碘離子對其降解速率影響,在此基礎上,采用氯胺消毒方式,考察溶液pH、氯胺投加量及溴離子濃度對碘代消毒副產(chǎn)物的生成影響.研究發(fā)現(xiàn),飲用水中壓紫外消毒工藝對碘酸根具有明顯降解作用,其光反應產(chǎn)物為碘離子.降解過程符合擬一級反應動力學方程,中壓紫外光強為8.5mW/cm~2時,其擬一級反應速率常數(shù)為(0.403±0.059)×10~(-3)s~(-1).水中天然有機物(NOM)可促進紫外光對碘酸根的降解,而初始碘離子濃度會抑制碘酸根降解.含碘酸鹽原水經(jīng)中壓紫外光照射后,后續(xù)氯胺消毒工藝將大量產(chǎn)生碘代三鹵甲烷(I-THMs).因此在采用中壓紫外/氯胺聯(lián)合消毒的凈水工藝中,碘酸根轉(zhuǎn)化后形成碘代消毒副產(chǎn)物的風險應當引起關(guān)注.
[Abstract]:The degradation rate of iodate by medium pressure ultraviolet was studied. The degradation rate of natural organic compounds and co-existing iodine ions were studied. On the basis of this, chloramines were used to sterilize the iodides. The effects of pH of solution, dosage of chloramine and concentration of bromine on the formation of by-products of iodinated disinfection were investigated. The photoreaction product is iodide ion. The degradation process accords with the pseudo-first-order reaction kinetics equation. The medium pressure ultraviolet light intensity is 8.5 MW / cm ~ 2:00, and its pseudo-first-order reaction rate constant is 0.403 鹵0.059) 脳 10 ~ (10) ~ (3) ~ (3) C ~ (-1) C ~ (-1). The degradation of iodate by ultraviolet light can be promoted by natural organic matter (Nom) in water. The initial concentration of iodine ion can inhibit the degradation of iodate radical. After the raw water containing iodate salt is irradiated by medium pressure ultraviolet light, the subsequent chloramine disinfection process will produce a large number of trihalomethane iodide (Thalomethane) I-THMsN. Therefore, in the process of purifying water with medium pressure UV / chloramine combined disinfection, The risk of the formation of iodinated disinfection by-products after the transformation of iodate should be concerned.
【作者單位】： 同濟大學環(huán)境科學與工程學院 污染控制與資源化研究國家重點實驗室;
【基金】：水體污染控制與治理科技重大專項水體污染控制與治理科技重大專項(2015ZX07406004)
【分類號】：TU991.2

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