土壤改良剂对荧蒽、苯并[k]荧蒽提取和植物吸收的影响

在温室条件下,利用盆栽实验研究了三种土壤改良剂(骨炭、活性炭、泥炭)对荧蒽和苯并k]荧蒽的提取和黑麦草吸收的影响.结果表明,添加骨炭、活性炭和泥炭后,土壤中可提取态荧蒽和苯并k]荧蒽的量比对照处理分别降低了43.1%-63.8%和35.2%-57.6%,在高剂量骨炭、活性炭和泥炭处理的土壤中,可提取态荧蒽和苯并k]荧蒽的量降低幅度均比相应低剂量处理的降低幅度大,并且各处理的效果与对照相比均达到了显著差异(p＜0.05);骨炭、活性炭和泥炭减少了荧蒽和苯并k]荧蒽在黑麦草地下部分和地上部分的累积量,并且荧蒽和苯并k]荧蒽在黑麦草地下部分和地上部分的累积量随着骨炭、活性炭和泥炭添加量的增加呈下降趋势.

EFFECTS OF SOIL AMENDMENTS ON EXTRACTABILITY AND PLANT UPTAKE OF FLUORANTHENE AND BENZO(K) FLUORANTHENE

The effects of the application of bone char,actived carbon and peat on the extractability and plant uptake of fluoranthene and benzo(k)fluoranthene were investigated in pot experiments in greenhouse.The results indicated that all of the three amendments added to the soil contaminated with PAHs could significantly decrease concentrations of extractable fluoranthene and benzo(k)fluoranthene in soils.Concentrations of extractable fluoranthene and benzo(k)fluoranthene in amended soils were reduced by 43.1% to 63.8% and 35.2% to 57.6% compared with the control soil respectively.The decrease of fluoranthene and benzo(k)fluoranthene in soils added more amendments was larger than that in soils added less amendments,compared with control soil.The accumulation of fluoranthene and benzo(k)fluoranthene in roots and shoots of ryegrass were significantly(reduced) by the application of amendments,and concentrations of fluoranthene and benzo(k)fluoranthene in roots and shoots of ryegrass were negatively correlated with the application rates of amendments.