http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ani Idris,Effaliza Misran,Noordin Mohd Yusof 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.6
In this study the toxic Cr(VI) which is a common pollutant to the environment is removed from the aqueous solution using the one step photocatalytic reduction to Cr(III) using PVA-alginate encapsulated gFe2O3 magnetic beads. The photocatalytic reduction of Cr(VI) by PVA-alginate encapsulated gFe2O3 magnetic beads was examined under sunlight and other 4 types of lamp: xenon lamp, black light bulb (BLB) lamp, light emitting diode (LED) lamp and fluorescent lamp. The experiments were performed at pH 1, initial Cr(VI) = 50 mg/L and the photocatalyst dosage of maghemite nanoparticles was kept at 8% (v/v). Removal of Cr(VI) was best under sunlight; 100% removal in 30 min, followed by xenon lamp; 100% removal in 100 min, BLB lamp; 70% removal in 100 min. LED and fluorescent lamp have about the same removal rate; 50% removal in 100 min. The Cr(VI) reduction using PVA-alginate magnetic beads fitted the Langmuir–Hinshelwood (L–H) kinetics model with a correlation coefficient (R2) of 0.972. The PVAalginate magnetic beads were capable of treating industrial chromium waste containing 300 mg/L Cr(VI) within 2 h under sunlight.
Kian Hwa Chan,Ee Ting Wong,Muhammad Irfan Khan,Ani Idris,Noordin Mohd Yusof 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
Nano-modification of membrane is another latest technique used to improve the membrane performance. In this paper, the influence and interaction of functionalized multiwall carbon nanotube (FMWCNT) with polyethylene glycol (PEG) as an additive on polyvinylidene difluoride (PVDF) membrane was investigated. The nano-modified membranes were then characterized in terms of pure water permeation (PWP), molecular weight cut-off (MWCO), contact angle, and calculated pore size distributions. Fourier transform infrared spectroscopy (FT-IR) and Scanning Electron Microscope (SEM) were then used to characterize the structure and morphology of the membranes. The separation properties of the membranes with respect to bovine serum albumin (BSA) retention, urea and creatinine clearances were investigated. The results revealed that the interaction of FMWCNT with PEG as an additive has improved the performance of PVDF as a potential dialysis membrane in terms of PWP, hydrophilicity retention, urea and creatinine clearances.
Modification of PES membrane by PEG-coated cobalt doped iron oxide for improved Cu(II) removal
Kian Hwa Chan,Ani Idris,Ee Ting Wong,Noordin Mohd Yusof 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-
Modification of membranes using nanoparticles is another latest trend in membrane technology. In thiswork, the hydrophobic cobalt(II) doped iron oxide nanoparticles were coated with polyethylene glycol ofmolecular weight 600 so as to prevent their agglomeration thus improving their dispersion when addedinto the dope solution containing 20 wt% of polyethersulfone in dimethylformamide. The nanomodifiedmembranes were characterized in terms of flux permeation (Q), wetting ability, contact angle, pore sizeand solute rejection. These membranes were then used to remove Cu(II) and its separation efficiency wasfound to improve significantly