Abstract：
:Effects of alkyl chain length of ionic liquid (IL), soil components and solution inorganic cations on a selected IL (1-methyl-3-octylimidazolium chloride, [OMIM]Cl) interaction with Chinese soils were investigated using batch sorption experiments. The results indicated that sorption energy was mainly controlled by chain length of [OMIM]Cl and contents of soil organic matter (SOM). [OMIM]Cl sorption on soils was mainly controlled by cation exchange process. Contributions of SOM and clay minerals (CMs) to [OMIM]Cl sorption were 7.3%-53.8% and 46.2%-92.7%, respectively. SOM possessed higher energy cation-exchange binding sites than CMs. To predict the sorption of [OMIM]Cl on soils, a model for the relationship between sorption coefficient (Kd) and cation exchange capacity (CEC) from soil components (SOM and CMs, i.e., CECSOM and CECCMs) as well as solution concentration (Ce) was established: LogKd = Log(1.67*CECSOM + 3.22*CECCMs) - 0.58LogCe. This model could provide a good prediction for sorption coefficients and the prediction errors were within 0.48 log unit. Competitive effects caused by inorganic cations followed the order of Ca2+ = Mg2+ > K+ > Na+. Concentrations and valence of coexisting ions both affect their competitive capability on [OMIM]Cl sorption. The finding of this study provided valuable information for evaluating the fate of [OMIM]Cl in soils.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Miao Q,Bi Edoi
10.1016/j.jenvman.2018.06.041subject
Has Abstractpub_date
2018-10-01 00:00:00pages
975-983eissn
0301-4797issn
1095-8630pii
S0301-4797(18)30683-2journal_volume
223pub_type
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