کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
634288 | 1456062 | 2013 | 6 صفحه PDF | دانلود رایگان |
Trioctylphosphine oxide (TOPO) was immobilized in polypropylene hollow fiber membranes for removal of phenol from wastewater. Scanning electron microscopy showed white deposits of TOPO dispersed non-uniformly within the resulting extractant-impregnated hollow fiber membranes (EIHFM). The EIHFMs manifested high adsorption capacity and mass transfer rates, with adsorption equilibrium attained within 10–30 min of operation. Experimental equilibrium adsorption capacities with a feed of 1000 mg/L phenol were 32, 42, 52 and 57 mg/g at 50, 100, 200 and 400 g/L TOPO, respectively. During repeated operation with 1000 mg/L phenol, the adsorption capacities of the EIHFMs remained stable at 32.2±1.3 and 52.3±0.9 mg/g for 10 subsequent runs at TOPO concentrations of 50 and 100 g/L, respectively. The EIHFMs, when used as adsorbents in a two phase partitioning bioreactor, alleviated substrate inhibition on Pseudomonas putida by rapidly adsorbing phenol to sub-inhibitory levels. Biodegradation of 1000 and 2000 mg/L phenol was completed within 26 and 36 h, respectively. These results suggest that the EIHFM is a promising technology for solventless extraction of aromatic compounds in wastewater treatment.
► We impregnated solid extractants in hollow fiber membranes (HFM).
► HFM did not require polymerization; needs little carrier solvent and is recyclable.
► HFM has adjustable sorption capacity, high rates and stable sustained performance.
► HFM was used for phenol biodegradation at high concentrations.
Journal: Journal of Membrane Science - Volume 437, 15 June 2013, Pages 1–6