TY - JOUR
T1 - Removal of organic pollutants from super heavy oil wastewater by lignite activated coke
AU - Tong, Kun
AU - Zhang, Yihe
AU - Fu, Dan
AU - Meng, Xianghai
AU - An, Qi
AU - Chu, Paul K.
PY - 2014/4/5
Y1 - 2014/4/5
N2 - Extraction of organic pollutants from super heavy oil wastewater (SHOW) by lignite activated coke (LAC) is investigated. The factors studied include the exposure time, temperature, and different pollutant concentrations in the wastewater. The equilibrium adsorption data are analyzed by the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) isotherms. The best match is obtained by the Freundlich isotherm and a chemical mechanism is suggested based on the D-R model. The adsorption kinetics follows the pseudo second order model and the mass transfer model suggests that external and intra-particle diffusion influences the adsorption process. Thermodynamics studies show that adsorption of organic materials is spontaneous at high temperature (303 and 313K) but not so at lower temperature (293K) and reveals an endothermic process and increase in randomness during adsorption. The pilot dynamic adsorption test indicates that LAC can remove not only organic pollutants such as COD, NH3-N, oils, but also inorganic pollutants such as Mg2+, Ca2+, and salts. © 2014 Elsevier B.V.
AB - Extraction of organic pollutants from super heavy oil wastewater (SHOW) by lignite activated coke (LAC) is investigated. The factors studied include the exposure time, temperature, and different pollutant concentrations in the wastewater. The equilibrium adsorption data are analyzed by the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) isotherms. The best match is obtained by the Freundlich isotherm and a chemical mechanism is suggested based on the D-R model. The adsorption kinetics follows the pseudo second order model and the mass transfer model suggests that external and intra-particle diffusion influences the adsorption process. Thermodynamics studies show that adsorption of organic materials is spontaneous at high temperature (303 and 313K) but not so at lower temperature (293K) and reveals an endothermic process and increase in randomness during adsorption. The pilot dynamic adsorption test indicates that LAC can remove not only organic pollutants such as COD, NH3-N, oils, but also inorganic pollutants such as Mg2+, Ca2+, and salts. © 2014 Elsevier B.V.
KW - Adsorption
KW - Lignite activated coke
KW - Organic pollutants
KW - Super heavy oil wastewater
UR - http://www.scopus.com/inward/record.url?scp=84894314244&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84894314244&origin=recordpage
U2 - 10.1016/j.colsurfa.2014.01.062
DO - 10.1016/j.colsurfa.2014.01.062
M3 - RGC 21 - Publication in refereed journal
SN - 0927-7757
VL - 447
SP - 120
EP - 130
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
ER -
