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Efficient Removal of Reactive Orange 107 Dye from Aqueous Media by Shrimp Shell Derived Chitosan Functionalized Magnetic Nanoparticles

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American Journal of Analytical Chemistry 2018年第12期9卷 633-653页

作者： Tehreem Saba fozia minhas Muhammad Imran Malik Farah Naz Talpur Abdul Jabbar Muhammad Iqbal Bhanger H.E.J. Research Institute of Chemistry International Center for Chemical and Biological Sciences (ICCBS) University of Karachi Karachi Pakistan Department of Basic Sciences and Humanities Khawaja Fareed University of Engineering and Information Technology (KFUEIT) Rahim Yar Khan Pakistan National Centre of Excellence in Analytical Chemistry University of Sindh Jamshoro Pakistan

In present work chitosan functionalized magnetic nanoparticles (CMNPs) were successfully prepared and investigated for the removal of Reactive Orange 107 dye (RO 107) from water. The chitosan was extracted from shrimp shells (Penaeus merguiensis) and was characterized by solubility test and fourier transform infrared spectroscopy (FTIR). Degree of deacetylation of chitosan was examined by 1H-NMR and potentiometric titration method. Thereafter, the chitosan was used for synthesis of CMNPs. The synthesized CMNPs were characterized by FTIR, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), thermal gravimetric analysis (TGA) and atomic force microscopy (AFM). Effects of various variables such as contact time, pH, stirring speed, adsorbent dosage, temperature, and concentration of electrolyte on extraction efficiency were evaluated. Freundlich isotherm model fits better that shows the removal of RO 107 with CMNPs by multilayer adsorption behaviour. Furthermore, kinetic study showed that adsorption process followed pseudo-second order kinetic model regulated by chemisorption. Thermodynamic analysis explained that adsorption of RO 107 onto CMNPs was endothermic as well as spontaneous. The developed CNMPs were applied to environmental remediation of spiked RO 107 treated waste water samples with 96.20% removal potential, hence, offered an effective sorbent for removal of RO 107 contaminated water samples.

关键词： Magnetic Nanoparticles Adsorption Chitosan Functionalization Anionic Dyes

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Extraction Properties of Calix[4]arenes towards Sulphonated Dyes

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American Journal of Analytical Chemistry 2016年第2期7卷 219-232页

作者： Muhammad Israr Faiza Faheem fozia T. minhas Asma Rauf Saba Rauf M. Raza Shah Fazal Rahim Kiramat Shah M. I. Bhanger Department of Chemistry Hazara University Mansehra Pakistan International Center for Chemical & Biological Science University of Karachi Karachi Pakistan NED University of Engineering & Technology Karachi Pakistan

Extraction of sulphonated dyes through supramolecular interaction with calix[4]arene derivatives is being presented here. The selectivity of calixarene derivatives namely piperidine derivative of calix[4]arene (calix-1), 1-methyl piperazine derivative of calix[4]arene (calix-2), and di-methyl amine derivative of calix[4]arene (calix-3) were evaluated initially against reactive red 2 (RR-2), acid black (AB), reactive blue 19 (B-19) and synthetic dye (D-2) by liquid-liquid extraction experiment. The results showed that the above three calixarenes possess excellent complexation abilities toward the selected dyes. The stoichiometric ratio for the calixarene derivatives and dyes was estimated through Job’s plot, whereas Hildebrand-Benesi equation was used to calculate formation constant (Ks) and molar absorptivity (Δε) of complexes. The binding association (Ka) and dissociation (Kd) constants were calculated by Scatchard plot additionally to further support the complexation data obtained from Hildebrand-Benesi equation. Conversely association constants from, both Hildebrand-Benesi equation and Scatchard plot i.e. Ks and Ka favor strong binding interaction between calix-1: D-2, calix-2: B-19, and calix-3: AB complexes. Thus present study adeptly supports the complexation of calixarene derivatives for sulfonated dyes.

关键词： Calixarene Derivative Complexation Job’s Plot Hildebrand and Benesi Equation Association Constant

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