Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/54029
Title: A low-cost adsorbent (wheat plant ash) prepared from agricultural waste for removal of paraquat from aqueous solutions
Authors: Kamble, Manisha G
Trivedi, Nikhilesh S
Mandavgane, Sachin A
Keywords: Adsorbate;Adsorbent;Adsorption;Paraquat;Wheatplant ash
Issue Date: Jan-2020
Publisher: NISCAIR-CSIR, India
Abstract: A low-cost adsorbent (wheat plant ash) has been prepared using a common agricultural waste (wheat straw) and its physicochemical characteristics, including chemical, physical, mineralogical, and morphological, and adsorption efficacy are investigated. WPA is characterized by SEM (scanning electron microscopy), CHNS(ultimate analysis) analysis, Brunauer–Emmett–Tellersurface area technique, and Fourier transform infrared method. The BET surface area of wheat plant ash was found to be 37 m2/g. To evaluate its adsorption capacity, paraquat is chosen as the adsorbate. Batch adsorption is performed by varying adsorbent dosage, initial concentration, and contact time. Experimental data are fitted to both kinetic and isotherm models. Pseudo-first-order and pseudo-second-order kinetic models are applied to experimental data, which indicated that the latter model had the best fit. Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherm models are then applied to the equilibrium data. The adsorption capacity of WPA for paraquat removal, determined using the Langmuir isotherm, is found to be approximately 241.3 mg/m2 at 303 K.
Page(s): 26-34
URI: http://nopr.niscair.res.in/handle/123456789/54029
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.27(1) [January 2020]

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