Citric acid modified waste cigarette filters for adsorptive removal of methylene blue dye from aqueous solution

Abstract

Waste cigarette filters (CFs) were recycled and modified with a nontoxic and low‐cost citric acid (CA). The modified CFs were employed in the adsorptive removal of methylene blue (MB) dye from aqueous medium. The influence of pH, contact time, initial dye concentration, and adsorbent dose on adsorption of MB dye was evaluated. The adsorption studies were conducted by employing linear and nonlinear Langmuir and Freundlich isotherm models. The adsorption capacity of CF obtained through linear and nonlinear Langmuir model were 88.02 and 94 mg g−1, which improved up to 163.93 and 168.81 mg g−1, respectively, after the introduction of functional groups in CF‐CA. The adsorption kinetics data were well fitted by pseudo‐second order kinetics with coefficient of regression (R2) closed to unity. The removal efficiency of CF‐CA was 97% at equilibrium time of 4 h. Desorption studies indicated that CF‐CA could be regenerated by using HCl (0.1 M) and desorption efficiency was up to 82% upon second cycle of reusability experiment. This study proposed a green and economical use of recycled CFs in dyes wastewater treatment, simultaneously reducing the negative environmental impact due to their improper disposal.

Eco-Friendly Detoxification of Congo Red Dye from Water by Citric Acid Activated Bioadsorbents Consisting of Watermelon and Water Chestnuts Peels Collected from Indigenous Resources

“…The adsorption capacity and percentage removal ( R % ) of CGR are calculated from Equations (9) and (10), respectively, where q e is the adsorbed quantity of CGR and C e is the quantity of CGR left after adsorption, while q m (mg.g -1 ) is the highest adsorption capacity, and b is (L.g -1 ) for adsorption energy, whereas in equation (9), V is the volume of adsorbate in dm 3 , while (m) is related to the mass of each adsorbent used in experimental work [59]. The correlation coefficients ( R 2 ) for the adsorption of CGR on CPWM, PWM, CPWC, and PWC are 0.999, 0.998, 0.997, and 0.988, respectively, and are closer to unity, while the maximum adsorption capacities ( Q normalmax ) of both citric acid processed adsorbents CPWM and CPWC are 8.3 and 7.95, respectively, as compared to their unmodified forms, PWM and PWC, which are 2.23 and 4.32 mg/g, respectively, reflecting the suitability and fitness of this isothermal model for the adsorptive eradication of CGR from aqueous solutions.…”

Smart win–win waste management: superhydrophobic filter using valorized cellulose acetate from discarded cigarette butts for cleaning up marine oil spill at Hurghada Red Sea shore in Egypt

“…In addition, by increasing the filter bed dose, the removal efficiency also increased, but the removal rate later almost reached a constant value with the increase in time. The filter media was saturated with the oil even at a higher weight, which might account for this (Tehrim et al, 2021). This might have been due to the fact that the porosity of the surface helps capture the oil where the pores increase the strength of the sorption mechanism through increasing the effective forces between the oil molecules on the surface of the CBs.…”

“…The current study was based on the use of hydrophobic waste based on waste valorization. et al, 2016) Ethanol/ultrasonic then NaOH Kerosene 4 min 96.0% (Ou et al, 2016) Citric acid-modified waste cigarette (30% ethanol solution) Methylene blue 120 mg/L, 1.5 g, 4 h, pH 6.5 72 mg/g (Tehrim et al, 2021) From an economic point of view, the cellulose acetate from CBs is considered a cost-efficient filter due to its high removal efficiency with its reuse option. Moreover, such a reuse technique helps in litter minimization.…”

“…Modern society is suffering from a severe global challenge causing environmental water deterioration due to modern aquaculture activities (Thabet et al, 2022a). Crude oil and its derivatives could travel thousands of miles and over dozens of hands prior to their final use (Tehrim et al, 2021;Thabet et al, 2022b). Under industrial assessments, over 80% of this oil is shipped to transfer the crude oil for use; the result is an accidental oil spill into the aquatic environment.…”