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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Parashar, Kamya Pillay, Kriveshini Maity, Arjun Ballav, Niladri Debnath, Sushanta |
| Description | Country affiliation: South Africa Author Affiliation: Parashar K ( Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa.); Ballav N ( Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa.); Debnath S ( Saha Institute of Nuclear Physics, Kolkata, West Bengal, India.); Pillay K ( Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa. Electronic address: kriveshinip@uj.ac.za.); Maity A ( Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa) |
| Abstract | Polypyrrole/hydrous tin oxide nanocomposites (PPy/HSnO NC 1, 2, 3, 4 and 5) were synthesized through encapsulating HSnO by the PPy via an in situ polymerization for fluoride removal. The optimized adsorbent i.e. PPy/HSnO NC 3 was characterized using FE-SEM, HR-TEM, ATR-FTIR, XRD, BET, TGA and zeta sizer. Microscopic images revealed the encapsulation of HSnO by precipitating PPy during polymerization. The FTIR and XRD studies confirmed the presence of both constituents. The BET surface area and pHpzc of the adsorbent were estimated to be 65.758m(2)/g and 7.6, respectively. The fluoride adsorption followed pseudo-second-order model and was commendably rapid. The monolayer adsorption capacity was found to be 26.16-28.99mg/g at pH 6.5±0.1. The thermodynamic parameters indicated the sorption of F(-) was spontaneous, endothermic and that physisorption occurred. The calculated activation energy (Eaâ ¼20.05kJ/mol) provided further evidence of a physisorption mechanism. Moreover, the adsorbent performed very well over a considerably wide pH range of 3.5-8.5 and in the presence of other co-existing ions. The regeneration of the F(-) laden PPy/HSnO NC 3 showed a high desorption efficiency of 95.81% up to 3 cycles. Ground water tested results also demonstrate the potential utility of the PPy/HSnO NC as an effective adsorbent. |
| ISSN | 00219797 |
| Journal | Journal of Colloid and Interface Science |
| Volume Number | 476 |
| e-ISSN | 10957103 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-08-15 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Colloid & Interface Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Colloid and Surface Chemistry Biomaterials Electronic, Optical and Magnetic Materials |
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