Song Yang, Wang Fang, Kengara Fredrick Orori, Bian Yongrong, Yang Xinglun, Gu Chenggang, Ye Mao, Jiang Xin
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China.
Environ Sci Process Impacts. 2015 Jan;17(1):74-80. doi: 10.1039/c4em00486h. Epub 2014 Nov 18.
The objective of this study is to compare the efficacies of powder activated carbon (PAC) and granular activated carbon (GAC) as amendments for the immobilization of volatile compounds in soil. Soil artificially-spiked with chlorobenzenes (CBs) was amended with either PAC or GAC to obtain an application rate of 1%. The results showed that the dissipation and volatilization of CBs from the amended soil significantly decreased compared to the unamended soil. The bioavailabilities of CBs, which is expressed as butanol extraction and earthworm accumulation, were significantly reduced in PAC and GAC amended soils. The lower chlorinated and hence more volatile CBs experienced higher reductions in both dissipation and bioavailability in the amended soils. The GAC and PAC equally immobilized more volatile CBs in soil. Therefore, it could be concluded that along with environmental implication, applying GAC was the more promising approach for the effective immobilization of volatile compounds in soil.
本研究的目的是比较粉末活性炭（PAC）和颗粒活性炭（GAC）作为土壤中挥发性化合物固定化改良剂的效果。用氯苯（CBs）人工加标的土壤用PAC或GAC进行改良，以使施用率达到1%。结果表明，与未改良土壤相比，改良土壤中CBs的消散和挥发显著降低。以丁醇萃取和蚯蚓积累表示的CBs生物有效性在PAC和GAC改良土壤中显著降低。在改良土壤中，氯化程度较低因而挥发性较高的CBs在消散和生物有效性方面的降低幅度更大。GAC和PAC在土壤中对挥发性更强的CBs的固定效果相当。因此，可以得出结论，考虑到环境影响，应用GAC是有效固定土壤中挥发性化合物更具前景的方法。
