The Impact of Different Root Exudate Components on Phenanthrene Availability in Soil
This study investigated the impact of different root exudate components (RECs) on the availability of phenanthrene as a representative of polycyclic aromatic hydrocarbons (PAHs) in soil (TypicPaleudalfs) using laboratory batch assays.Six typical RECs were compared including citric acid,oxalic acid,malic acid,alanine,serine,and fructose.An n-butanol extraction procedure and a sorption experiment were used to predict the availability of phenanthrene in soil.We found that both the n-butanol extraction and sorption process increased the availability of phenanthrene with increasing REC concentrations.The availability of phenanthrene in soil with various treatments decreased in the following order:organic acids (citric acid>oxalic acid>malic acid) >amino acids (alanine >serine)>fructose treatments.The mechanism of REC-influenced availability of PAH in soil is discussed based on the observed metal dissolution,soil organic matter reduction,and dissolved organic matter release from soil solids.
Root exudate compantents Soil Root exudate Polycyclic aromatic hydrocarbons (PAHs) Availability Sorption
Bingqing Sun Yanzheng Gao
College of Resource and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China
国际会议
the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))
杭州
英文
364-366
2012-09-09（万方平台首次上网日期，不代表论文的发表时间）