Equilibrium and Thermodynamic Studies on the Adsorption of an Organophosphorous Pesticide onto “Waste” Jute Fiber Carbon

Abstract

Adsorption of the monocrotophos pesticide from aqueous solution using "waste" jute fiber (JF) has been investigated. Adsorption equilibrium, kinetics, thermodynamics, and mass transfer studies were investigated as a function of agitation time, adsorbent dose, pH, and temperature. The adsorption kinetics were analyzed by using pseudofirst-order and pseudosecond-order kinetic equations. The adsorption isotherm data were fitted well by the Langmuir isotherm model, and the adsorption capacity was found to be 124 mg • L -1 . Thermodynamic parameters of the adsorption process, that is, ∆G, ∆S, and ∆H, were calculated, and their negative values indicate the adsorption was exothermic and had a spontaneous nature. The effective diffusion coefficients were calculated with respect to the variation in concentration and temperature. A single-stage batch adsorption process was also designed by using the adsorption isotherm data.

Functionalized coconut husks for rhodamine-B dye sequestration

“…Chemical interaction between Rh-B and CHA was also observed at higher temperature which resulted in the creation of higher affinities between the active sites and Rh-B dye. More so, when temperature was changed, it altered the adsorbent equilibrium capacity (Hema and Arivoli 2007;Sureshkumar and Namasivayam 2008;Sadasivam et al 2010;Gupta et al 2012;Inyinbor et al 2015;Dahri et al 2016;Dharmendirakumar et al 2016;Fu et al 2016;Inyinbor et al 2016;Kooh et al 2016;Goswami and Phukan 2017;Iqbal et al 2017;Adegoke et al 2019). The capacity of adsorption for the most AC tends to increase with an increase in temperature, i.e., from 303 to 323 K (Hema and Arivoli 2007;Ahmad et al 2016).…”

“…Rhodamine-B (Rh-B) dye is an amphoteric dye; though often listed as a basic dye, to the class of xanthene dye, it is noted to be harmful when swallowed, with acute oral toxicity (Namasivayam and Kanchana 1992;Wilhelm and Stephan 2007;Hema and Arivoli 2007;Vasu 2008;Parab et al 2009;Li et al 2010;Gupta et al 2012;Ashkarran et al 2013;Gong et al 2013;Suc and Kim Chi 2017;Cheng et al 2017;Singh et al 2017;Adegoke et al 2019). Rh-B dye causes serious eye damage or irritation, hazardous to aquatic environment with long-term effects (Hema and Arivoli 2007;Sureshkumar and Namasivayam 2008;Sadasivam et al 2010;Gupta et al 2012;Inyinbor et al 2015;Dahri et al 2016;Dharmendirakumar et al 2016;Fu et al 2016;Inyinbor et al 2016;Kooh et al 2016;Goswami and Phukan 2017;Iqbal et al 2017;Adegoke et al 2019). Consequently, water treatment is one of the global campaign exercises, which demands scientific investigation.…”

1 ESTUDO DA VIABILIDADE DO CAULE DE MANDIOCA (Manihot esculenta Crantz) NA ADSORÇÃO DE CORANTES

“…Ambos os corantes seguem um processo fisissortivo, pois apresentam valores de ΔH menores que 40 kJ.mol -1 e valores de ΔG para a entre de 0 a 20 kJ.mol -1 (Airoldi& Faria, 2000;Sadasivam et al;.O valor negativo de ΔS sugere que há uma diminuição no estado de desordem das moléculas durante o processo de adsorção, devido às interações com o adsorvente, com consequente diminuição de energia do meio. …”

Hierarchical Nanohexagon Ceramic Sheet Layers as Platform Adsorbents for Hydrophilic and Hydrophobic Insecticides from Agricultural Wastewater

“…Effective methods to remove pesticides include photocatalysis, UV irradiation, membrane filtration, and ion exchange; these methods have been the focus of considerable interest . The heterogeneous adsorption method based on solid adsorbents has been effectively used for the removal of pesticides from agricultural wastewater . However, inexpensive, efficient, and consistent‐quality adsorbents are still needed for real‐time removal of pesticides from environmental, biological, and industrial samples .…”

“…[10,11] The heterogeneous adsorption methodb ased on solid adsorbentsh as been effectively used for the removalo fp esticides from agricultural wastewater. [12][13][14] However, inexpensive, efficient, and consistent-quality adsorbentsa re still needed for real-timer emovalo fp esticidesf rom environmental, biological, and industrial samples. [15] In this context, an adsorbentt hat has al arge surface area-to-volume ratio (i.e.,alarge number of sorptions ites), has physically unique structures, and is accessible as as ponge with interpenetrating pores needs to be fabricated;t his adsorbent would effectively enhancet he required features for removal, transformation,a nd control of pollutants.…”