Hydrous ferric oxide nanoparticles hosted porous polyethersulfone adsorptive membrane: chromium (VI) adsorptive studies and its applicability for water/wastewater treatment
- 15 Downloads
In this present study, adsorptive membranes for Cr(VI) ion removal were prepared by blending polyethersulfone (PES) with hydrous ferric oxide (HFO) nanoparticles (NPs). The effects of HFO NPs to PES weight ratio (0–1.5) on the physicochemical properties of the resultant HFO/PES adsorptive membranes were investigated with respect to the surface chemistry and roughness as well as structural morphologies using different analytical instruments. The adsorptive performance of the HFO NPs/PES membranes was studied via batch adsorption experiments under various conditions by varying solution pH, initial concentration of Cr(VI), and contact time. The results showed that the membrane made of HFO/PES at a weight ratio of 1.0 exhibited the highest adsorption capacity which is 13.5 mg/g. Isotherm and kinetic studies revealed that the mechanism is best fitted to the Langmuir model and pseudo-second-order model. For filtration of Cr(VI), the best promising membranes showed improved water flux (629.3 L/m2 h) with Cr(VI) ion removal of 75%. More importantly, the newly developed membrane maintained the Cr(VI) concentration below the maximum contamination level (MCL) for up to 9 h.
KeywordsAdsorptive membrane Adsorption, membrane filtration Chromium (VI) removal
The authors would like to acknowledge the financial support from the Ministry of Education Malaysia and Universiti Teknologi Malaysia under Fundamental Research Grant Scheme (R.J130000.7846.4F929), MRUN grant scheme (R.J130000.7851.4 L865), UTM-TDR grant (Q.J130000.3551.06G07), Higher Institution Centre of Excellence (HiCOE) grant (R.J090301.7846.4J179 and R.J090301.7846.4J180). The first author, N. Abdullah, would like to acknowledge the Zamalah scholarship received under Universiti Teknologi Malaysia.
- Bhattacharya AK, Naiya TK, Mandal SN, Das SK (2008) Adsorption, kinetics and equilibrium studies on removal of Cr(VI) from aqeuous solutions using different low-cost adsorbents. Chem Eng J 137:529–541Google Scholar
- Devi B, Jahagirdar A, Ahmed M (2012) Adsorption of chromium on activated carbon prepared from coconut shell. Adsorption. 2:364–370Google Scholar
- Dhagat A, Goyal B, Sailo L (2013) Effect of size of iron oxide coated sand ( IOCS ) on removal of Cr ( VI ) from water. 3rd International Conference on Ecology. Environ Biol Sci (ICEEB 2013) 4:1–5Google Scholar
- Rahman MM, Khan SB, Jamal A, Faisal M, Aisiri AM (2011) Iron oxide nanoparticles. Nanomaterials 3:43–67Google Scholar