红麻及厌氧混合菌群对重金属修复

Remediation of Heavy Metals by Kenaf and Anaerobic Mixed Flora

为了解红麻种植(H)及厌氧混合菌群(T-Abs)矿化对多重金属污染土壤上水稻产量及重金属含量的影响,本研究采用红麻种植、厌氧混合菌群(T-ABs)及红麻种植+厌氧混合菌群(H+T-ABs)进行多重金属污染地处理,通过对水稻晚期的取样调查,糙米和米糠的镉、镍、锌及铜重金属含量分析。结果表明:三种处理(H,T-Abs, H+T-Abs)对谷子重金属含量降低具有一定作用,其中H+T-Abs处理效果最好,其次是T-Abs,再者是H。三种处理对土壤铜降低转移效果最好,其次是土壤镉。三种处理对土壤重金属都具有一定的降低转移能力,H+T-Abs降低转移能力最强,H次之,T-Abs最弱。T-Abs和H+T-Abs处理土壤镉、锌、镍金属形态中的可利用形态降低,并且不可利用形态增加,H和CK变化趋势相似。因此,T-Abs处理是通过使土壤镉、镍、锌金属形态从可利用态转化为不可利用态,从而降低植物对其的吸收。

To understand the effects ofkenafplanting(H)and anaerobic mixed flora(T-Abs)mineralization on rice yield and heavy metal content in soils contaminated with heavy metals.In this study,kenaf planting,anaerobic mixedflora(T-ABs)andkenafplanting+anaerobicmixedflora(H+T-ABs)wereusedforthetreatmentofmulti-heavy metal contamination.The contents of cadmium,nickel,zinc and copper in brown rice and millet bran were ana-lyzed by sampling investigation in late rice.The results showed that three treatments(H,T-Abs,H+T-Abs)had a certain effect on reducing the content of heavy metals in millet,among which H+T-Abs had the best effect,fol-lowed by T-Abs and H.The three treatments had the best effect on reducing and transferring soil copper,followed by soil cadmium.All the three treatments had certain ability to reduce and transfer the heavy metals in soil.H+T-Abs had the strongest ability to reduce and transfer the heavy metals,followed by H,and T-Abs was the wea-kest.The available forms of T-Abs and H+T-Abs in soil cadmium,nickel,and zinc metal form decreased,and the unavailable forms increased,and the trends of H and CK were similar.Therefore,T-Abs treatment reduces the ab-sorption of plants by transforming the cadmium,zinc,and nickel metal forms from available to unavailable states.