有机硅表面活性剂对水体中多环芳烃的浊点萃取研究

摘要/Abstract

摘要： Cloud point extraction (CPE) processes with two silicone surfactants, Dow Corning DC-190
and DC-193, were studied as preconcentration and treatment for the water polluted by three
trace polycyclic aromatic hydrocarbons (PAHs): anthracene, phenanthrene and pyrene. For all
cases, the volumes of surfactant-rich phase obtained by two silicone surfactants were very
small, i.e. a lower water content in the surfactant-rich phase was obtained. For example,
less than 3% of the initial solution was obtained in a 1% (by mass) surfactant solution,
which was much smaller than that of TX-114 in the same surfactant concentration. And TX-114
is known as a high compact surfactant-rich phase among most nonionic surfactants, thus the
comparison showed that an excellent enrichment was ensured in the analysis application by
the CPE process with the silicone surfactants, and the lower water content obtained in the
surfactant-rich phase is also important in the large scale water treatment. The influences
of additives and phase separation methodology on the recovery of PAHs were discussed.
Comparing with DC-193, DC-190 has a lower cloud point and a higher recovery (near 100%) of
all the three PAHs in same surfactant con-centration, which was required for application as
a preconcentration process prior to HPLC system. However the DC-190 solution is hard to be
phase separated only by heating, whereas DC-193 has a relative higher phase sepa-rating
speed by heating, but a high cloud point (around 360K) limits its application. Due to the
phase separation by heating is the only method of CPE suitable to the large scale water
treatment, the mixtures of two silicone surfac-tants solutions were investigated in this
study. A solution containing 1% of mixed DC-190 and DC-193 (in the ratio of 90︰10) removed
anthracene, phenanthrene and pyrene near 100% with a relative low cloud point and quick
phase separating speed.

关键词: cloud point extraction;silicone surfactant;ultraviolet absorbance;polycyclic aromatic hydrocarbon;water treatment

Abstract: Cloud point extraction (CPE) processes with two silicone surfactants, Dow Corning DC-190
and DC-193, were studied as preconcentration and treatment for the water polluted by three
trace polycyclic aromatic hydrocarbons (PAHs): anthracene, phenanthrene and pyrene. For all
cases, the volumes of surfactant-rich phase obtained by two silicone surfactants were very
small, i.e. a lower water content in the surfactant-rich phase was obtained. For example,
less than 3% of the initial solution was obtained in a 1% (by mass) surfactant solution,
which was much smaller than that of TX-114 in the same surfactant concentration. And TX-114
is known as a high compact surfactant-rich phase among most nonionic surfactants, thus the
comparison showed that an excellent enrichment was ensured in the analysis application by
the CPE process with the silicone surfactants, and the lower water content obtained in the
surfactant-rich phase is also important in the large scale water treatment. The influences
of additives and phase separation methodology on the recovery of PAHs were discussed.
Comparing with DC-193, DC-190 has a lower cloud point and a higher recovery (near 100%) of
all the three PAHs in same surfactant con-centration, which was required for application as
a preconcentration process prior to HPLC system. However the DC-190 solution is hard to be
phase separated only by heating, whereas DC-193 has a relative higher phase sepa-rating
speed by heating, but a high cloud point (around 360K) limits its application. Due to the
phase separation by heating is the only method of CPE suitable to the large scale water
treatment, the mixtures of two silicone surfac-tants solutions were investigated in this
study. A solution containing 1% of mixed DC-190 and DC-193 (in the ratio of 90︰10) removed
anthracene, phenanthrene and pyrene near 100% with a relative low cloud point and quick
phase separating speed.

Key words: cloud point extraction, silicone surfactant, ultraviolet absorbance, polycyclic aromatic hydrocarbon, water treatment

姚炳佳, 杨立, 胡琼, Shigendo Akita. 有机硅表面活性剂对水体中多环芳烃的浊点萃取研究[J]. CIESC Journal.

YAO Bingjia, YANG Li, HU Qiong, Shigendo Akita. Cloud point extraction of polycyclic aromatic hydrocarbons in aqueous solution with
silicone surfactants[J]. .

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