酚在饱水亚砂土层中迁移转化的研究

通过静态吸附实验,静态降解实验和动态土柱实验,研究了苯酚在饱和亚砂土层中的吸附性能,在好氧和厌氧条件下的降解性能以及其他有机物和氮,磷等营养元素对苯酚降解过程的影响;实验结果用计算机进行线性拟合和参数估值,求解出分配系数Ｋｄ＝０．１１２ｃｍ＾３／ｇ和降解系数Ｋ＝０．５５ｄ＾－１。研究表明,苯酚在亚砂土层中的吸附性能较差,在好氧条件下具有很好的降解性能,而在厌氧条件下,其降解性能极差,营养元素氮,磷

Study on the Transportation and Transformation of Phenol in Saturated Silt Loam

The transportation and transformation of phenol in saturated silt loam were studied by means of batch adsorption, batch biodegradation and dynamic soil column experiments. Longitudinal dispersion coefficient (D), adsorption coefficient (K_d) and biodegradation coefficient (K) were obtained through curve fitting and parameter estimation:K_d=0.112cm³/g,K=0.55d^-1. The results indicate that phenol was hard to be adsorbed by the silt loam, readily biodegraded in the soil under an aerobic condition, but less biodegraded under an anaerobic condition. The presences of N and P speeded up biodegradation of phenol. Batch tests usually overestimate the K_d values because of the "Solids Effect".