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硝酸改性活性炭對(duì)滲濾液中小分子有機(jī)物的吸附性能
摘要： 以硝酸為改性劑,分別采用浸漬和浸漬-高溫?zé)崽幚矸椒▽?duì)活性炭進(jìn)行了改性.低溫氮吸附結(jié)果表明,活性炭表面積和微孔體積在浸漬后都變小,再經(jīng)過(guò)高溫?zé)崽幚砗髣t都變大.酸堿滴定顯示,改性后活性炭表面酸性都增大,其中浸漬的酸性最大.對(duì)填埋場(chǎng)滲濾液中小分子有機(jī)物進(jìn)行了等溫線和動(dòng)力學(xué)吸附實(shí)驗(yàn),結(jié)果發(fā)現(xiàn)改性后活性炭對(duì)有機(jī)物的吸附量增加;硝酸浸漬活性炭吸附速率降低,而浸漬-高溫?zé)崽幚韯t使吸附速率明顯加快.針對(duì)滲濾液中小分子有機(jī)物,硝酸浸漬-高溫?zé)崽幚淼幕钚蕴课叫Ч詈?吸附量最大,吸附速率最快. Abstract： Granular activated carbons (GAC) were treated with nitric acid as modifier by immersion and immersionthermal method, respectively. The results of low temperature nitrogen adsorption indicated surface areas and micropore volumes of GAC decreased after immersion while increased after the subsequent thermal treatment. Acid/base titrations showed GAC surface acidities were raised after modification, and the acidity by immersion was stronger. The adsorption isotherm and kinetics studies were carried out with low molecular weight organic matter (LMWOM) in municipal solid waste landfill leachates. It was found the adsorption capacities were raised after modification, and the adsorption rate was decreased by immersion while obviously increased by immersion-thermal treatment. For adsorption of LMWOM in leachates, GAC modified by HNO_3-immersionthermal method behaved best, because its adsorption capacity was biggest and the adsorption rate was fastest. 作 者： 宋建剛 岳東北 聶永豐 SONG Jian-gang YUE Dong-bei NIE Yong-feng 作者單位： 清華大學(xué)環(huán)境科學(xué)與工程系,北京,100084 期 刊： 環(huán)境化學(xué) ISTICPKU Journal： ENVIRONMENTAL CHEMISTRY 年，卷(期)： 2009, 28(6) 分類號(hào)： X13 關(guān)鍵詞： 活性炭 硝酸改性 吸附 小分子有機(jī)物 滲濾液. Keywords： granular activated carbon HNO_3 modification adsorption low molecular weight organic matter leachate.【硝酸改性活性炭對(duì)滲濾液中小分子有機(jī)物的吸附性能】相關(guān)文章：
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