TY - JOUR
T1 - Adsorptive removal of hydrophobic organic compounds by carbonaceous adsorbents
T2 - A comparative study of waste-polymer-based, coal-based activated carbon, and carbon nanotubes
AU - Lian, Fei
AU - Chang, Chun
AU - Du, Yang
AU - Zhu, Lingyan
AU - Xing, Baoshan
AU - Liu, Chang
N1 - Funding Information:
This work was supported by the Tianjin Municipal Science and Technology Commission (No. 08ZCGHHZ01000), the Ministry of Education of China (No. 708020), the Ministry of Science and Technology of China (No. 2008ZX08526-003, 2009DFA91910), the New Century Talent program, and the China-US Center for Environmental Remediation and Sustainable Development.
PY - 2012/9
Y1 - 2012/9
N2 - Adsorption of the hydrophobic organic compounds (HOCs) trichloroethylene (TCE), 1,3-dichlorobenzene (DCB), 1,3-dinitrobenzene (DNB) and γ-hexachlorocyclohexane (HCH) on five different carbonaceous materials was compared. The adsorbents included three polymer-based activated carbons, one coal-based activated carbon (F400) and multiwalled carbon nanotubes (MWNT). The polymer-based activated carbons were prepared using KOH activation from waste polymers: polyvinyl chloride (PVC), polyethyleneterephthalate (PET) and tire rubber (TR). Compared with F400 and MWNT, activated carbons derived from PVC and PET exhibited fast adsorption kinetics and high adsorption capacity toward the HOCs, attributed to their extremely large hydrophobic surface area (2700 m2/g) and highly mesoporous structures. Adsorption of small-sized TCE was stronger on the tire-rubber-based carbon and F400 resulting from the pore-filling effect. In contrast, due to the molecular sieving effect, their adsorption on HCH was lower. MWNT exhibited the lowest adsorption capacity toward HOCs because of its low surface area and characteristic of aggregating in aqueous solution.
AB - Adsorption of the hydrophobic organic compounds (HOCs) trichloroethylene (TCE), 1,3-dichlorobenzene (DCB), 1,3-dinitrobenzene (DNB) and γ-hexachlorocyclohexane (HCH) on five different carbonaceous materials was compared. The adsorbents included three polymer-based activated carbons, one coal-based activated carbon (F400) and multiwalled carbon nanotubes (MWNT). The polymer-based activated carbons were prepared using KOH activation from waste polymers: polyvinyl chloride (PVC), polyethyleneterephthalate (PET) and tire rubber (TR). Compared with F400 and MWNT, activated carbons derived from PVC and PET exhibited fast adsorption kinetics and high adsorption capacity toward the HOCs, attributed to their extremely large hydrophobic surface area (2700 m2/g) and highly mesoporous structures. Adsorption of small-sized TCE was stronger on the tire-rubber-based carbon and F400 resulting from the pore-filling effect. In contrast, due to the molecular sieving effect, their adsorption on HCH was lower. MWNT exhibited the lowest adsorption capacity toward HOCs because of its low surface area and characteristic of aggregating in aqueous solution.
KW - Activated carbon
KW - Adsorption mechanism
KW - Hydrophobic organic compound
KW - Polymer waste
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U2 - 10.1016/S1001-0742(11)60984-4
DO - 10.1016/S1001-0742(11)60984-4
M3 - Article
C2 - 23520861
AN - SCOPUS:84866307273
SN - 1001-0742
VL - 24
SP - 1549
EP - 1558
JO - Journal of Environmental Sciences
JF - Journal of Environmental Sciences
IS - 9
ER -