TY - JOUR
T1 - Ethanol-activated granular aerogel as efficient adsorbent for persistent organic pollutants from real leachate and hospital wastewater
AU - Prasanna, V. Lakshmi
AU - Mamane, Hadas
AU - Vadivel, Vinod Kumar
AU - Avisar, Dror
N1 - Publisher Copyright:
© 2019
PY - 2020/2/15
Y1 - 2020/2/15
N2 - Hydrophobic aerogels were used to remove three types of persistent organic pollutants: pharmaceutical drugs (i.e. doxorubicin [DOX], paclitaxel [TAX]), phthalates (diethyl phthalate [DEP]), and hydrophilic rhodamine dye (RhB) from synthetic and real wastewaters, using Lumira granular aerogel from Cabot activated with EtOH (ET-GAG). The hydrophobic silica aerogel was characterized by X-ray diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), Brunauer–Emmet–Teller (BET) and attenuated total reflection–Fourier transform infrared spectroscopy. The pollutants were analysed by high-performance liquid chromatography (HPLC)–UV and HPLC–mass spectrometry. The adsorption process was governed by hydrophobic- hydrophobic interactions between the ET-GAG and micropollutants. The adsorption capacity of ET-GAG, examined by batch experiments, for DOX, TAX and DEP were 13.80, 14.28 and 17.54 mg/g respectively. The rate of adsorption to ET-GAG is high in the initial 40 min followed by no change in the rate due to saturation of adsorption sites. ET-GAG was able to completely remove micropollutants from real leachate and hospital wastewater, implying practical applications. Regeneration of the aerogel was studied by solvent extraction. Et-GAG adsorbent demonstrated better removal of toxic chemotherapeutic drugs and phthalates than GAC.
AB - Hydrophobic aerogels were used to remove three types of persistent organic pollutants: pharmaceutical drugs (i.e. doxorubicin [DOX], paclitaxel [TAX]), phthalates (diethyl phthalate [DEP]), and hydrophilic rhodamine dye (RhB) from synthetic and real wastewaters, using Lumira granular aerogel from Cabot activated with EtOH (ET-GAG). The hydrophobic silica aerogel was characterized by X-ray diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), Brunauer–Emmet–Teller (BET) and attenuated total reflection–Fourier transform infrared spectroscopy. The pollutants were analysed by high-performance liquid chromatography (HPLC)–UV and HPLC–mass spectrometry. The adsorption process was governed by hydrophobic- hydrophobic interactions between the ET-GAG and micropollutants. The adsorption capacity of ET-GAG, examined by batch experiments, for DOX, TAX and DEP were 13.80, 14.28 and 17.54 mg/g respectively. The rate of adsorption to ET-GAG is high in the initial 40 min followed by no change in the rate due to saturation of adsorption sites. ET-GAG was able to completely remove micropollutants from real leachate and hospital wastewater, implying practical applications. Regeneration of the aerogel was studied by solvent extraction. Et-GAG adsorbent demonstrated better removal of toxic chemotherapeutic drugs and phthalates than GAC.
KW - Chemotherapeutic drugs
KW - Ethanol activated granular aerogel
KW - Hospital wastewater and leachate
KW - Hydrophobic silica aerogel
KW - Persistent organic pollutant
KW - Phthalate
UR - http://www.scopus.com/inward/record.url?scp=85073022125&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2019.121396
DO - 10.1016/j.jhazmat.2019.121396
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C2 - 31610343
AN - SCOPUS:85073022125
SN - 0304-3894
VL - 384
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 121396
ER -