本文選題：納米氧化銅顆粒 + 微米氧化銅顆粒��； 參考：《中國(guó)環(huán)境科學(xué)》2017年04期

【摘要】：納米氧化銅不同于常規(guī)的氧化銅,納米氧化銅的尺寸小,比表面積大,對(duì)生態(tài)環(huán)境存在潛在危害.本次通過(guò)向土壤中加入不同比例的納米氧化銅(N CuO)和微米氧化銅(M Cu0)(0,50,200,800,1600mg/kg干土)觀察它們對(duì)土壤脲酶活性和}0菌群落的影響.同T,進(jìn)一步研究了N CuO和M CuO分R%與乙基黃原酸鉀(PEX)復(fù)合污染對(duì)土壤微生物的影響.N CuO較M CuO對(duì)脲酶活性有更強(qiáng)的抑制作用,只有M CuO濃度為1600mg/kg對(duì)脲酶的影響較明顯.N CuO對(duì)脲酶活性的抑制可能與破壞細(xì)菌的}0胞膜或刺激細(xì)菌產(chǎn)生活性氧,造成}0菌}0胞的衰退有關(guān),N CuO對(duì)細(xì)菌群落結(jié)構(gòu)的影響也較大.N CuO與PEX復(fù)合污染加劇了N CuO對(duì)土壤微生物的毒性,使脲酶的活性大幅度降低,細(xì)菌的群落結(jié)構(gòu)也發(fā)生了較大的變化.N CuO及其復(fù)合污染對(duì)土壤微生物的作用機(jī)制需進(jìn)一ki研究.通過(guò)比較研究N CuO和M CuO的生態(tài)毒性,納米顆粒的生態(tài)毒性更需要引起足夠的重視.
[Abstract]:Nanometer copper oxide is different from the conventional copper oxide. The size of nanometer copper oxide is small and its specific surface area is large, which has potential harm to ecological environment. In this paper, the effects of different proportions of nano-cupric oxide N CuO and micron copper oxide on soil urease activity and bacterial community were observed by adding different proportions of nano-CuO and micron copper oxide mCuO (50200800mg / kg dry soil) to the soil. At the same time, the effects of N CuO and M CuO fraction R% and ethyl xanthate potassium pex on soil microorganism were further studied. N CuO had stronger inhibitory effect on urease activity than M CuO. The inhibitory effect of N CuO on urease activity was more obvious when M CuO concentration was 1600mg/kg. The inhibition of urease activity by N CuO might be related to destroying the cell membrane of bacteria or stimulating bacteria to produce reactive oxygen species. The effect of N CuO on bacterial community structure was also significant. The compound pollution of N CuO and PEX aggravated the toxicity of N CuO to soil microorganism and significantly decreased the activity of urease. The community structure of bacteria also changed greatly. The action mechanism of N CuO and its compound pollution on soil microorganism should be further studied. By comparing the ecological toxicity of N CuO and M CuO, enough attention should be paid to the ecological toxicity of nanoparticles.
【作者單位】： 北京科技大學(xué)能源與環(huán)境工程學(xué)院;北京科技大學(xué)工業(yè)典型污染物資源化處理北京市重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院生態(tài)環(huán)境研究中心;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(41273091) 科技北京百名領(lǐng)軍人才培養(yǎng)工程資助項(xiàng)目(LJ201620)
【分類(lèi)號(hào)】：X53;X172

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