66 / 2016-04-28 17:12:39

Biochar addition enhances phenanthrene retention in sediment

sediment,biochar, ,phenanthrene,desorption

Biochar is believed to provide multiple eco-functions, including its ability for soil remediation as a result of its large adsorption capacity. In the present study, a plant biomass-derived biochar was added to phenanthrene polluted sediment, in order to investigate its performance in sediment remediation. During the incubation period that lasted for 60 days, it was observed that the partition coefficient of phenanthrene increased in sediment either with or without biochar addition, as a result of aging process, whilst the biochar-added sediments showed much higher partition coefficients, as well as more curved adsorption isotherms. Under the extreme extraction by sodium dodecyl benzene sulfonate, the release ratio of phenanthrene from polluted sediment was significantly reduced from 60% to 5% by 5% (w/w) addition of biochar. These results suggested that biochar would possibly be a promising material for organic pollutants contaminated sediment remediation.