Adsorption characteristic of organic combined pollutants on the surface of groundwater aquifer
LI Hui1, DENG Qiang2
1. Key Laboratory of Groundwater Contamination Remediation, China Geological Survey, The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Science, Shijiazhuang 050061, China;
2. College of Water Resource and Environment, Hebei Geology University, Shijiazhuang 050031, China
To definite the adsorption characteristics of chlorohydrocarbon and aromatic hydrocarbon combined pollutants in groundwater aquifer, adsorption tests were carried out with toluene, benzene, 1,2-dichloropropane, 1,2,3-chemical propane (TCP) as typical pollutants. The results showed that the adsorption process could be described by linear model of Henry with distribution coefficient (Kp) of 0.38, 0.41, 0.73 and 1.00kg/L, respectively, which indicated that the order of adsorption strength of the pollutants is toluene > benzene > 1, 2-dichloropropane > TCP. Furthermore, it was observed that benzene obviously increased the adsorption of toluene in fine sand and toluene decreased the adsorption of benzene conversely; 1, 2-dichloropropane restrained the adsorption of TCP, however, the effect of TCP on the adsorption of 1, 2-dichloropropane was not significant. As for different type of pollutants, the adsorption capacity of TCP in aquifer medium increased with the concentration of toluene; When the initial concentration of toluene was lower than 2mg/L, the TCP acted as a stimulus for the adsorption of toluene, on the contrary, TCP acted as an inhibitor for the adsorption of toluene in aquifer medium.
李卉, 邓强. 复合有机污染物在含水层介质表面的吸附性能[J]. 中国环境科学, 2018, 38(9): 3413-3420.
LI Hui, DENG Qiang. Adsorption characteristic of organic combined pollutants on the surface of groundwater aquifer. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(9): 3413-3420.
Lin M Q, Ning, X A, An T C, et al. Degradation of polycyclicaromatic hydrocarbons (PAHs)in textile dyeing sludge withultrasound and Fenton processes:Effect of system parametersand synergistic effect study[J]. Journal of Hazardous Materials, 2016,305:7-16.
Chiou C T, Schmedding D W, Manes M. Partitioning of organic compounds in octanol-watersystems[J]. Environmental Science and Technology, 1983,17:227-229.
[12]
Xia G S, Ball W P. Adsorption-partitioning uptake of nine low-polarity organic chemicals ona natural sorbent[J]. Environmental Science and Technology, 1999,33(2):262-269.
[13]
Liu S J. A mathematical model for competitive adsorptions[J]. Separation and Purification Technology, 2015,144:80-89.
[14]
Dang S Q, Zhao L, Yang Q, et al.Competitive adsorption mechanism of thiophene with benzene in FAU zeolite:The role of displacement[J]. Chemical Engineering Journal, 2017,328:172-185.
[15]
David F C, Alipio B C, Manuel A E, et al. Competitive adsorption/desorption of tetracycline, oxytetracycline and chlortetracycline on twoacid soils:Stirred flow chamber experiments[J]. Chemosphere, 2015,134(1):361-366.
[16]
Hussein M S, Ahmed M J.Fixed bed and batch adsorption of benzene and toluene from aromatic hydrocarbons on 5A molecular sieve zeolite[J]. Materials Chemistry and Physics, 2016,181:512-517.
[17]
Chen Y D, Jiang Y P, Zhu Y N, et al. Fate and transport of ethanol-blended dissolved BTEXhydrocarbons:a quantitative tracing study of asand tank experiment[J]. Environmental EarthSciences, 2013,70(1):49-56.
[18]
Go J, Stegemann J A. Modelling post-depositional transport of PAHs in aquatic bedsediments using CoReTranS[J]. Journal of Soils and Sediments, 2012,12(10):1541-1548.
Endo S, Grathwohl P, Haderlein S B, et al. Compound-specific factors influencing sorption nonlinearity in natural organic matter[J]. Environmental Science and Technology, 2008,42(16):5897-5903.
[24]
Kobayashi T, Shimizu Y, Urano K. Estimation of adsorbed amounts of volatile organic compounds to wet soil based on the properties of the compounds and soils[J]. Science of the Total Environment, 2003, 301(1/3):215-223.
Carmo A M, Hundal L S, Thompson M L. Sorption of hydrophobic organic compounds by soil Materials:application of unit equivalent Freundlich coefficients[J]. Environmental Science and Technology, 2000,34(20):4363-4369.
Sander M, Pignatello J J. Characterization of charcoal adsorption sites for aromatic compounds:Insights drawn from single-solute and Bi-solute competitive experiments. Environmental Science and Technology, 2005,39(6):1606-1615.
