Evaluation of the Ability of Sasola Plant to Remove Malachite Green Dye from Wastewater

Document Type : Original Article

Authors

Department of Nature Engineering, Faculty of Agriculture and Natural Resources, Ardakan University, P.O. Box: 184, Ardakan, Iran.

10.30509/jcst.2025.167597.1265

Abstract

In the present study, the ability of the desert plant Sasola to remove malachite green (MG) dye without any pretreatment was investigated, because this condition can be considered a suitable economic and environmental option for removing colored pollution. Adsorption experiments were performed under conditions of initial MG dye concentration (110 to 170 mg L-1), adsorbent concentration (10 to 200 mg L-1), contact time (2 to 20 min), and pH (4 to 10). The highest MG removal occurred at an initial dye concentration of 50 mg/L, an adsorbent concentration of 60 mg/L, a contact time of 6 min, and a pH of 7, in which about 92.11 % of the dye was removed. The optimum adsorption capacity of the adsorbent under these conditions was about 1.64 mg g-1. The Langmuir isotherm model as well as the pseudo-second-order kinetic model were able to describe the equilibrium data well due to the high correlation coefficients (R2). The thermodynamic parameters were evaluated and showed that the adsorption process mechanism is an endothermic process. According to the experimental results, salt grass is an environmentally friendly adsorbent for removing MG from aqueous solutions, which is also cost-effective and can be useful in meeting the increasing demand for adsorbents used in environmental protection processes.

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References

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