本文關(guān)鍵詞： 生物質(zhì)炭 有機(jī)污染物 吸附特性 吸附機(jī)理　出處：《土壤學(xué)報(bào)》2017年06期 　論文類型：期刊論文

【摘要】：生物質(zhì)炭是一種利用廢棄生物質(zhì)材料在缺氧或厭氧環(huán)境中熱化學(xué)轉(zhuǎn)換制備的多孔級(jí)富碳固體材料。因其吸附能力強(qiáng),制備原料來源廣泛,生產(chǎn)成本低且環(huán)境友好等優(yōu)點(diǎn)受到學(xué)術(shù)界越來越多的關(guān)注。探究生物質(zhì)炭對(duì)有機(jī)污染物的吸附機(jī)理和規(guī)律,對(duì)于評(píng)估其環(huán)境行為和應(yīng)用價(jià)值至關(guān)重要。著重綜述了目前研究報(bào)道的生物質(zhì)炭吸附有機(jī)污染物的吸附機(jī)理,包括分配作用、表面吸附作用和孔隙截留等。一般低溫生物質(zhì)炭對(duì)非極性有機(jī)物的吸附機(jī)制以分配作用為主,這種非競(jìng)爭(zhēng)性吸附機(jī)理可以解釋高濃度有機(jī)污染物在生物質(zhì)炭上的吸附過程。表面吸附是一種非線性競(jìng)爭(zhēng)性吸附作用,是有機(jī)污染物在生物質(zhì)炭表面有效吸附位點(diǎn)上形成靜電作用或通過氫鍵、離子建、π-π相互作用等結(jié)合的過程。孔隙截留是另一種生物質(zhì)炭固定有機(jī)污染物的微觀機(jī)制,有機(jī)污染物在孔隙內(nèi)部的分配和吸附也是生物質(zhì)炭吸附能力的重要體現(xiàn)。而在實(shí)際復(fù)雜的污染環(huán)境中,各類生物質(zhì)炭對(duì)有機(jī)污染物的吸附過程需要多種機(jī)制共同解釋。此外,本文對(duì)吸附機(jī)制的影響因素進(jìn)行了分析和總結(jié),生物質(zhì)炭自身理化特性決定了其應(yīng)用價(jià)值,生物質(zhì)炭的性質(zhì)與有機(jī)污染物的極性、芳香性和分子大小等相匹配才能更好地實(shí)現(xiàn)吸附固定,不同的吸附環(huán)境如吸附介質(zhì)、p H和共存離子等也會(huì)對(duì)吸附機(jī)制和吸附效果產(chǎn)生影響。最后,文章進(jìn)一步探討了生物質(zhì)炭吸附有機(jī)污染相關(guān)研究未來應(yīng)著重解決的問題,以及生物質(zhì)炭在有機(jī)污染土壤修復(fù)中的應(yīng)用前景。
[Abstract]:Biomass carbon is a kind of porous carbon-rich solid material which is prepared by thermochemical conversion of waste biomass materials in anoxic or anaerobic environment. The advantages of low production cost and environmental friendliness have attracted more and more attention in academic circles. It is very important to evaluate its environmental behavior and application value. The adsorption mechanism, including partitioning, of organic pollutants adsorbed by biomass carbon, which has been reported at present, is reviewed in this paper. Surface adsorption and pore retention etc. The adsorption mechanism of low temperature biomass carbon for non-polar organic matter is mainly partitioning. The mechanism of noncompetitive adsorption can explain the adsorption process of high concentration organic pollutants on biomass carbon. Surface adsorption is a nonlinear competitive adsorption. It is the process of organic pollutants forming electrostatic interaction on the surface of biomass carbon or binding through hydrogen bond, ion building, 蟺-蟺 interaction, etc. Pore interception is another microscopic mechanism of biomass carbon immobilization of organic pollutants. The distribution and adsorption of organic pollutants in the pores is also an important embodiment of the adsorption capacity of biomass carbon. In the actual complex pollution environment, the adsorption process of organic pollutants by various biomass carbon needs to be explained by various mechanisms. In this paper, the influencing factors of adsorption mechanism are analyzed and summarized. The physical and chemical properties of biomass carbon determine its application value, the properties of biomass carbon and the polarity of organic pollutants. In order to match the aromaticity and molecular size, adsorption fixation can be achieved better. Different adsorption environments such as adsorption medium pH and coexisting ions will also affect the adsorption mechanism and adsorption effect. In this paper, the problems that should be solved in the future and the application prospect of biomass carbon in the remediation of organic contaminated soil were discussed.
【作者單位】： 土壤環(huán)境與污染修復(fù)重點(diǎn)實(shí)驗(yàn)室(中國(guó)科學(xué)院南京土壤研究所);中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)項(xiàng)目(2014CB441105) 國(guó)家自然科學(xué)基金項(xiàng)目(41671236) 中國(guó)科學(xué)院“一三五”計(jì)劃與領(lǐng)域前沿項(xiàng)目(ISSASIP1614)共同資助~~
【分類號(hào)】：X53

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本文編號(hào)：1507412