CAJ | 학술논문

本文研究了重金属和石油烃复合污染土壤中，腐植酸对草本植物吸收重金属的影响。结果显示：腐植酸大幅度地降低了污染土壤中可溶性和交换态重金属含量，但提高了植物可利用态重金属含量。土壤添加腐植酸后，除N i外，重金属潜在生物有效性和可淋出性因子大于1，这表明大多数重金属对植物具有潜在的有效性。此外，腐植酸增加了铅(Pb)、铜(Cu)、镉(Cd)和镍(Ni)在供试植物幼苗和根部的积累，最高的是高羊茅幼苗，达264.7%，生物富集系数从0.30提高到1.10。芸苔根中Ni和Pb的生物富集系数也有所提高。这些研究结果表明，石油烃与重金属同时污染的情况下，加入腐植酸可以促进植物吸收重金属，但降低重金属淋失，防止地下污染。
본문연구료중금속화석유경복합오염토양중，부식산대초본식물흡수중금속적영향。결과현시：부식산대폭도지강저료오염토양중가용성화교환태중금속함량，단제고료식물가이용태중금속함량。토양첨가부식산후，제N i외，중금속잠재생물유효성화가림출성인자대우1，저표명대다수중금속대식물구유잠재적유효성。차외，부식산증가료연(Pb)、동(Cu)、력(Cd)화얼(Ni)재공시식물유묘화근부적적루，최고적시고양모유묘，체264.7%，생물부집계수종0.30제고도1.10。예태근중Ni화Pb적생물부집계수야유소제고。저사연구결과표명，석유경여중금속동시오염적정황하，가입부식산가이촉진식물흡수중금속，단강저중금속림실，방지지하오염。
The effects of humic acid (HA) on heavy metal uptake by herbaceous plants in soil simultaneously contami-nated with heavy metals and petroleum hydrocarbons were investigated. The results showed that HA reduced readily soluble and exchangeable forms of heavy metals in the contaminated soil but increased their plant-available forms. Po-tential bioavailability and leachability factors became larger than 1 after adding HA to the soil, except for those of Ni, suggesting that more heavy metals could be potentially phytoavailable for plant uptake. Furthermore, HA increased the accumulation of Pb, Cu, Cd, and Ni in the shoots and roots of selected plants. The greatest increase in the accumulation of heavy metals was 264.7%in the shoot of Festuca arundinacea, with the bioconcentration factor (BCF) increasing from 0.30 to 1.10. Humic acid also increased the BCFs of the roots of Brassica campestrisfor Ni and Pb. These results suggest that HA amendment could enhance plant uptake of heavy metals, while concurrently reducing heavy metal leachability and preventing subsurface contamination, even in soils simultaneously contaminated with petroleum hydrocarbons.