Study on Influential Factors of Adsorption and Desorption of Phenanthrene by Three Typical Soils

Xue Tian

《World Scientific Research Journal》 6卷3期 (2020/03) Pp. 1-7

https://doi.org/10.6911/WSRJ.202003_6(3).0001

摘要

In recent years, with the development of the country's industrialization, the content of Polycyclic aromatic hydrocarbons (PAHs) in the soil has continuously increased, which has caused widespread concern in various countries around the world. PAHs are an important hydrophobic organic pollutant in the environment, and their adsorption and desorption behaviors directly affect environmental fate and ecotoxicity. In this paper, the batch equilibrium method was used to study the adsorption and desorption behaviors of PAHs and phenanthrene by coarse sand, aeolian sand and loess under different influencing factors, which are the environmental and chemical behaviors of PAHs in the soil. And migration and transformation laws provide a theoretical basis. The experimental results are as follows: ① In the studied pH range, all three soils showed that with the increase of pH, the adsorption capacity also increased. That is, when the soil is under alkaline conditions, its adsorption is more favorable. As for the desorption behavior, with the increase of pH value, the desorption effect of phenanthrene on coarse sand and loess is not obvious, and the effect on aeolian sand is greater. The optimal pH for coarse sand and aeolian sand desorption is 6.0, and the optimal pH for loess is 7.0; ② Affected by different initial concentrations, the processes of adsorption and desorption of phenanthrene by coarse sand, aeolian sand, and loess are basically the same, all of which are coarse The desorption amount of aeolian sand and loess increased with the increase concentration.

關鍵字

Phenanthrene ； adsorption desorption ； influencing factors ； soil

參考文獻

Yun-H S.Sorption of natural dissolved organic matter onsoil.Chemosphere,1999, Vol.38(7):1505-1515.

Behrends T, Herrmann R.Partitioning studies of anthracene on silica in the presence of a Cationic surfactant:dependency on PH and ionic strength.Physieal Chemieal Earth,1998, Vol.23(2):229-235.

RainerH, IrisM, PeterG. Proceedings of the 2nd International Workshop on Groundwater Risk Assessment at Contaminated Sites(GRACOS) and Intergrated Soil and Water Protection SOWA[D].2002,193-198.

Wang Xin.Enrichment Characteristics and Desorption Thermodynamics of Polycyclic Aromatic Paths in Soil in Typical Areas of Shanghai [D] .East China Normal University, 2015. (In Chinese)

Zhou Xuhui.Effects of Different Organic Matter Components in Soil on Environmental Behavior of Polycyclic Aromatic Hydrocarbons [D] .Fujian Normal University, 2013. (In Chinese)