本文選題：錳渣 + 浸出毒性　； 參考：《環(huán)境工程》2017年12期

【摘要】：我國(guó)電解錳廢渣產(chǎn)量大,污染物的浸出毒性較強(qiáng)。錳渣堆放方式粗放,渣庫(kù)管理落后,且長(zhǎng)期暴露在自然環(huán)境中,導(dǎo)致大量污染物遷移到周邊的土壤及水體中。為了解決錳渣的無害化處理問題,在分析其浸出毒性的基礎(chǔ)上,研究了生石灰固化技術(shù)對(duì)錳渣的浸出毒性的影響。結(jié)果表明:錳渣中的主要污染物為可溶性Mn~(2+)和NH_4~+-N,含量極高,嚴(yán)重超標(biāo);利用生石灰的吸附、包裹及化學(xué)反應(yīng)作用,能有效將可溶性Mn~(2+)固化為難溶Mn O_2,同時(shí)將NH_4~+-N轉(zhuǎn)化為氣態(tài)NH_3,浸出液中污染物濃度均符合相關(guān)標(biāo)準(zhǔn)要求;當(dāng)生石灰添加量為10%,錳渣含水率為27%,預(yù)攪拌時(shí)間40 min,預(yù)靜置時(shí)間3 d,錳渣浸出液中可溶性Mn~(2+)濃度降為2.60 mg/L,固化率達(dá)99.8%,低于5.0 mg/L的標(biāo)準(zhǔn)限值;NH_4~+-N濃度降為21.23 mg/L,脫除率為96.73%,低于25 mg/L的標(biāo)準(zhǔn)限值。
[Abstract]:The output of electrolytic manganese waste residue in China is large and the leaching toxicity of pollutants is strong. Because of the extensive storage mode of manganese slag, the management of slag reservoir is backward, and it is exposed to the natural environment for a long time, which results in a large number of pollutants migrating to the surrounding soil and water body. In order to solve the problem of innocuous treatment of manganese slag, on the basis of analyzing its leaching toxicity, the influence of quicklime curing technology on leaching toxicity of manganese slag was studied. The results show that the main pollutants in manganese slag are soluble Mn~(2) and NH4- N, which are extremely high and seriously exceed the standard, and the adsorption, encapsulation and chemical reaction of quicklime are used. Soluble Mn~(2) can be used to solidify difficult-soluble MnO _ 2, at the same time, NH _ 4-N can be converted into gaseous NH _ 3, and the concentration of pollutants in the leachate meets the requirements of relevant standards. When the content of quicklime is 10, the water content of manganese slag is 27, the pre-agitation time is 40 minutes, and the presetting time is 3 days, the concentration of soluble Mn~(2 in the leaching solution of manganese slag decreases to 2.60 mg / L, the solidification rate is 99.8%, and the standard limit of 5.0 mg/L is lower than the standard limit of 5.0 mg/L, the concentration of NH _ 4 ~ -N decreases to 21.23 mg / L, and the concentration of NH _ 4 ~ -N decreases to 21.23 mg / L in the leaching solution of manganese slag. The division rate was 96.73, below the standard limit of 25 mg/L.
【作者單位】： 重慶工程職業(yè)技術(shù)學(xué)院;中國(guó)環(huán)境科學(xué)研究院;
【基金】：國(guó)家水體污染控制與治理科技重大專項(xiàng)(2009ZX07529-005) 科技部2010年科研院所技術(shù)開發(fā)研究專項(xiàng)資金(2010EG166314) 國(guó)家科技支撐計(jì)劃(2012BAF03B03)
【分類號(hào)】：X781.1

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