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Advanced treatment of oil recovery wastewater from polymer flooding by UV/H_2O_2/O_3 and fine filtration 被引量:10
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作者 REN Guang-meng SUN De-zhi Jong Shik CHUNK 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第1期29-32,共4页
In order to purify oil recovery wastewater from polymer flooding (ORWPF) in tertiary oil recovery in oil fields, advanced treatment of UV/H2O2/O3 and fine filtration were investigated. The experimental results showe... In order to purify oil recovery wastewater from polymer flooding (ORWPF) in tertiary oil recovery in oil fields, advanced treatment of UV/H2O2/O3 and fine filtration were investigated. The experimental results showed that polyacrylamide and oil remaining in ORWPF after the conventional treatment process could be effectively removed by UV/H2O2/O3 process. Fine filtration gave a high performance in eliminating suspended solids. The treated ORWPF can meet the quality requirement of the wastewater-bearing polymer injection in oilfield and be safely re-injected into oil reservoirs for oil recovery. 展开更多
关键词 oil recovery wastewater from polymer flooding UV/H2O2/O3 process POLYACRYLAMIDE
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Adsorptive Removal of Reactive Dye from Water by Modified Montmorillonite
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作者 彭龙贵 张广成 +2 位作者 朱江花 王秀秀 杨晓凤 《Journal of Donghua University(English Edition)》 EI CAS 2017年第3期436-441,共6页
Polyaniline-intercalated montmorillonite( PANI-MMT)was prepared via in-situ intercalative polymerization and used as the adsorbent for the removal of reactive green 19( RG-19) dye from water. The structure,composition... Polyaniline-intercalated montmorillonite( PANI-MMT)was prepared via in-situ intercalative polymerization and used as the adsorbent for the removal of reactive green 19( RG-19) dye from water. The structure,composition and specific surface area of asprepared composite were characterized using Fourier transform infrared spectroscopy( FT-IR),X-ray diffraction( XRD) and surface area analyzer. The adsorption of RG-19 by PANI-MMT was investigated as a function of contact time,temperature and pH. The results indicated the adsorption kinetics of RG-19 onto PANI-MMT followed the pseudo second-order model best among the pseudo firstorder,pseudo second-order and Elovich kinetic models. The equilibrium data fitted the Langmuir model better than the Freundlich model. Moreover,the maximum adsorption capacity for RG-19 decreased with the increase of initial solution pH. It can be concluded that the PANI-MMT can be a potential adsorbent for RG-19 removal from water. 展开更多
关键词 PANI polymerization Modified adsorbent kinetics fitted isotherm wastewater aniline anionic
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Removal of total cyanide in coking wastewater during a coagulation process: Significance of organic polymers 被引量:9
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作者 Jian Shen He Zhao +2 位作者 Hongbin Cao Yi Zhang Yongsheng Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第2期231-239,共9页
Whether a cationic organic polymer can remove more total cyanide (TCN) than a non-ionic organic polymer during the same flocculation system has not been reported previously. In this study, the effects of organic pol... Whether a cationic organic polymer can remove more total cyanide (TCN) than a non-ionic organic polymer during the same flocculation system has not been reported previously. In this study, the effects of organic polymers with different charge density on the removal mechanisms of TCN in coking wastewater are investigated by polyferric sulfate (PFS) with a cationic organic polymer (PFS-C) or a non-ionic polymer (PFS-N). The coagulation experiments results show that residual concentrations of TCN (Fe(CN)6^3-) after PFS-C flocculation (TCN 〈 0.2 mg/L) are much lower than that after PFS-N precipitation. This can be attributed to the different TCN removal mechanisms of the individual organic polymers. To investigate the roles of organic polymers, physical and structural characteristics of the floes are analyzed by FT-IR, XPS, TEM and XRD. Owing to the presence of N+ in PFS-C, Fe(CN)3- and negative flocs (Fe(CN)63- adsorbed on ferric hydroxides) can be removed via charge neutralization and electrostatic patch flocculation by the cationic organic polymer. However, non-ionic N in PFS-N barely reacts with cyanides through sweeping or bridging, which indicates that the non-ionic polymer has little influence on TCN removal. 展开更多
关键词 cationic polymer total cyanide removal coking wastewater coagulation
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Competitive effects of humic acid and wastewater on adsorption of Methylene Blue dye by activated carbon and non-imprinted polymers 被引量:6
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作者 Audrey Murray Banu Ormeci 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第4期310-317,共8页
Natural organic matter(NOM), present in natural waters and wastewater, decreases adsorption of micropollutants, increasing treatment costs. This research investigated mechanisms of competition for non-imprinted poly... Natural organic matter(NOM), present in natural waters and wastewater, decreases adsorption of micropollutants, increasing treatment costs. This research investigated mechanisms of competition for non-imprinted polymers(NIPs) and activated carbon with humic acid and wastewater. Three different types of activated carbons(Norit PAC 200,Darco KB-M, and Darco S-51) were used for comparison with the NIP. The lower surface area and micropore to mesopore ratio of the NIP led to decreased adsorption capacity in comparison to the activated carbons. In addition, experiments were conducted for single-solute adsorption of Methylene Blue(MB) dye, simultaneous adsorption with humic acid and wastewater, and pre-loading with humic acid and wastewater followed by adsorption of MB dye using NIP and Norit PAC 200. Both the NIP and PAC 200 showed significant decreases of 27% for NIP(p = 0.087) and 29% for PAC 200(p = 0.096) during simultaneous exposure to humic acid and MB dye. There was no corresponding decrease for NIP or PAC 200 pre-loaded with humic acid and then exposed to MB. In fact, for PAC 200, the adsorption capacity of the activated carbon increased when it was pre-loaded with humic acid by 39%(p = 0.0005). For wastewater, the NIP showed no significant increase or decrease in adsorption capacity during either simultaneous exposure or pre-loading. The adsorption capacity of PAC 200 increased by 40%(p = 0.001) for simultaneous exposure to wastewater and MB. Pre-loading with wastewater had no effect on MB adsorption by PAC 200. 展开更多
关键词 Molecularly imprinted polymer Non-imprinted polymer Water treatment wastewater treatment Activated carbon Micropollutants Pore-blocking Adsorption
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