發(fā)布時間：2018-04-03 15:17

  本文選題：低溫氧等離子體　切入點：深度降解　出處：《高電壓技術(shù)》2017年08期

【摘要】：為降解廢水中難降解有機污染物,采用強電離放電將氧離解、電離成低溫氧等離子體,并將其注入廢水處理反應(yīng)塔中,在反應(yīng)塔中主要進行四步關(guān)鍵的等離子體反應(yīng)。首先,低溫氧等離子體中O_2~+與水分子反應(yīng)生成微量·OH;然后,O_3與微量·OH反應(yīng)形成高反應(yīng)速率常數(shù)的過氧羥基自由基引發(fā)劑HO_2·;接著,高濃度O_3在引發(fā)劑HO_2·作用下生成氧化力強、反應(yīng)速率很高的足量高濃度·OH;因此·OH將無選擇、快速地將廢水中難降解有機污染物降解成無害小分子有機物,最終礦化成CO_2、H_2O。實驗結(jié)果表明:低溫氧等離子體僅用2.5 min把廢水中難降解有機污染物質(zhì)量濃度從145.0 mg/L降至25.5 mg/L,去除率達到83.5%。與常規(guī)污水處理技術(shù)相比,采用強電離放電形成低溫氧等離子體降解廢水中難降解有機物方法具有設(shè)備投資和運行成本低以及污水處理系統(tǒng)簡單等特點,將為受難降解有機物污染的廢水回用提供一種經(jīng)濟、實用的新方法。
[Abstract]:In order to degrade the refractory organic pollutants in wastewater, oxygen is dissociated by strong ionization discharge and ionized into low temperature oxygen plasma, which is injected into the wastewater treatment reaction tower. Four key steps of plasma reaction are carried out in the reactor.First, O _ s _ 2~ in low temperature oxygen plasma reacts with water molecules to produce trace amounts of OH; then, O _ S _ 3 reacts with trace OH to form superoxide hydroxyl radical initiator HO_2 with high reaction rate constant; then, high concentration O _ 3 produces strong oxidation power under the action of initiator HO_2.Therefore, OH will not have the choice to quickly degrade the organic pollutants in the wastewater into harmless small molecular organic compounds, and finally mineralize to CO _ 2O _ 2H _ 2O.The experimental results show that the mass concentration of refractory organic pollutants in wastewater can be reduced from 145.0 mg/L to 25.5 mg / L by low temperature oxygen plasma for only 2.5 min, and the removal rate is 83.5%.Compared with the conventional wastewater treatment technology, the refractory organic matter in wastewater is degraded by high ionization discharge to form low temperature oxygen plasma, which has the advantages of low equipment investment, low operation cost and simple sewage treatment system.It will provide a new economic and practical method for reuse of wastewater contaminated by refractory organic matter.
【作者單位】： 大連海事大學(xué)物理系;
【基金】：國家自然科學(xué)基金(61371027;11374044) 國家高技術(shù)研究發(fā)展計劃(863計劃)(2008AA06Z317)~~
【分類號】：X703

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本文編號：1705752