TY - JOUR
T1 - Treatment of polycyclic aromatic hydrocarbons (PAHs) from aqueous solutions by flotation using colloidal gas aphrons
AU - Pal, Priyabrata
AU - Corpuz, Aiza Gay
AU - Hasan, Shadi W.
AU - Sillanpää, Mika
AU - Banat, Fawzi
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3/15
Y1 - 2022/3/15
N2 - Aqueous solutions contaminated with polycyclic aromatic hydrocarbons (PAHs) pose severe environmental risks, making their removal necessary. Flotation with colloidal gas aphrons (CGAs) has recently demonstrated high removal efficiencies for various pollutants present in aqueous solutions. This study determined the efficacy of CGAs in removing low-ring PAHs (naphthalene, fluorene, and phenanthrene) from aqueous solutions. CGAs were produced from different surfactants, such as anionic sodium dodecylbenzene sulfonate (SDBS), cationic hexadecyl trimethylammonium bromide (HTAB), and natural surfactant obtained from the leaves of Ziziphus spina-christi (ZSC). PAHs removal efficiency was studied by varying different parameters, such as type of surfactant, PAHs solution pH, CGAs flow rate, and PAHs and CGAs solution temperature. Results showed that at pH 5.6 and 25 °C, fluorene and phenanthrene were fully removed using CGAs (flow rate of 100 mL/min) derived from cationic HTAB surfactant, while naphthalene was removed to the extent of approximately 88.4% under similar conditions. These findings suggest that CGAs derived from cationic HTAB surfactant have a greater capacity for extracting low-ring PAHs from aqueous media.
AB - Aqueous solutions contaminated with polycyclic aromatic hydrocarbons (PAHs) pose severe environmental risks, making their removal necessary. Flotation with colloidal gas aphrons (CGAs) has recently demonstrated high removal efficiencies for various pollutants present in aqueous solutions. This study determined the efficacy of CGAs in removing low-ring PAHs (naphthalene, fluorene, and phenanthrene) from aqueous solutions. CGAs were produced from different surfactants, such as anionic sodium dodecylbenzene sulfonate (SDBS), cationic hexadecyl trimethylammonium bromide (HTAB), and natural surfactant obtained from the leaves of Ziziphus spina-christi (ZSC). PAHs removal efficiency was studied by varying different parameters, such as type of surfactant, PAHs solution pH, CGAs flow rate, and PAHs and CGAs solution temperature. Results showed that at pH 5.6 and 25 °C, fluorene and phenanthrene were fully removed using CGAs (flow rate of 100 mL/min) derived from cationic HTAB surfactant, while naphthalene was removed to the extent of approximately 88.4% under similar conditions. These findings suggest that CGAs derived from cationic HTAB surfactant have a greater capacity for extracting low-ring PAHs from aqueous media.
KW - Colloidal gas aphrons
KW - Flotation
KW - Polycyclic aromatic hydrocarbons
KW - Surfactant
KW - Wastewater
UR - http://www.scopus.com/inward/record.url?scp=85122022014&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2021.120367
DO - 10.1016/j.seppur.2021.120367
M3 - Article
AN - SCOPUS:85122022014
SN - 1383-5866
VL - 285
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 120367
ER -