【摘要】：使用海泡石、磷酸二氫鈣、鈣鎂磷肥、氧化鈣和氧化鎂等土壤改良劑及其組合,對(duì)湖南省某鉛鋅礦冶煉廠附近的重金屬污染土壤進(jìn)行了穩(wěn)定化修復(fù)試驗(yàn),利用BCR連續(xù)提取法進(jìn)行形態(tài)分析,并進(jìn)行穩(wěn)定化效果的評(píng)價(jià)。結(jié)果表明,各改良劑組合均能夠有效改變土壤中Zn、Cd和Pb的形態(tài)分布,弱酸提取態(tài)含量的減少率分別為Zn:17.03%~83.13%,Cd:45.03%~99.17%,Pb:54.05%~99.44%,降低重金屬的不穩(wěn)定形態(tài)和生物可利用性,穩(wěn)定化效果顯著。改良劑對(duì)Zn元素的穩(wěn)定化效果影響程度為:鈣鎂磷肥+氧化鈣鈣鎂磷肥+氧化鎂鈣鎂磷肥海泡石+磷酸二氫鈣海泡石;對(duì)Cd元素的穩(wěn)定化效果影響程度為:鈣鎂磷肥+氧化鈣鈣鎂磷肥+氧化鎂鈣鎂磷肥海泡石+磷酸二氫鈣海泡石;對(duì)Pb元素的穩(wěn)定化效果影響程度為:海泡石+磷酸二氫鈣鈣鎂磷肥+氧化鎂鈣鎂磷肥+氧化鈣鈣鎂磷肥海泡石。該復(fù)合污染土壤中,Zn、Cd、Pb穩(wěn)定效果最優(yōu)處理為10%鈣鎂磷肥+5%氧化鈣組合。
[Abstract]:Using sepiolite, calcium dihydrogen phosphate, calcium magnesium phosphate, calcium oxide and magnesium oxide as soil modifiers and their combinations, the stabilization and remediation experiments of heavy metal contaminated soil near a lead and zinc mine smelter in Hunan Province were carried out. BCR continuous extraction method was used to analyze the morphology and evaluate the stabilization effect. The results showed that each modifier combination could effectively change the speciation distribution of Zn,Cd and Pb in soil, and the reduction rate of the content of weak acid extract was Zn:17.03%~83.13%,Cd:45.03%~99.17%, respectively. Pb:54.05%~99.44%, reduced the unstable morphology and bioavailability of heavy metals, and the stabilization effect was remarkable. The effect of the modifier on the stabilization of Zn elements is as follows: calcium magnesium phosphate sepiolite dihydrogen calcium phosphate sepiolite; The stabilization effect of Cd is as follows: calcium magnesium phosphate sepiolite dihydrogen calcium phosphate sepiolite; The effect of stabilization on Pb element is as follows: sepiolite phosphate dihydrogen calcium magnesium phosphate magnesium calcium magnesium phosphate sepiolite. The optimal stabilization effect of Zn,Cd,Pb was 10% calcium magnesia phosphate fertilizer 5% calcium oxide combination.
【作者單位】： 輕工業(yè)環(huán)境保護(hù)研究所/工業(yè)場地污染與修復(fù)北京市重點(diǎn)實(shí)驗(yàn)室;海口市土地整治重大工程領(lǐng)導(dǎo)小組;山西農(nóng)業(yè)大學(xué)林學(xué)院;北京市南水北調(diào)團(tuán)城湖管理處;
【基金】：海南省�？谑心隙山饔蛲恋卣沃卮蠊こ炭蒲许�(xiàng)目:底泥應(yīng)用試驗(yàn)示范工程監(jiān)測與應(yīng)用效果評(píng)價(jià) 2014年北京市科學(xué)技術(shù)研究院“科技萌芽計(jì)劃” 2015年輕工業(yè)環(huán)境保護(hù)研究所“公益院所改革與發(fā)展專項(xiàng)” 北京市科學(xué)技術(shù)研究院青年骨干計(jì)劃:Pb、Cd復(fù)合污染土壤穩(wěn)定劑優(yōu)選及穩(wěn)定化條件研究
【分類號(hào)】：X753;X53

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