This comparative study evaluates how bentonite and activated charcoal remove paraphenylene diamine, indicating effective adsorption methods for water treatment.
Aromatic amines such as paraphenylene diamine, used as a dye intermediate and in textiles pose a serious threat to human health due to its carcinogenicity. Ground water as well as surface water in the Gangetic plain near Nathnagar block of Bhagalpur city has been found contaminated with heavy metal due to effluents of textiles industries in waterbodies. Though several traditional methods are available for removal of dyes, bentonite minerals have been used for removal of dyes through adsorption. High cation exchange capacity and mesoporous structure can be attributed to the adsorption of dyes. Absorbance of paraphenylene diamine using bentonite mineral and activated charcoal has been studied in the present paper. The powdered mass of bentonite and activated charcoal are highly mesoporous. The removal of PPD has been controlled by several factors such as pH, different initial concentrations, and time intervals. The maximum removal efficiency using bentonite and activated charcoal has been studied at pH 2 and 8 with initial concentrations of 20ppm,30ppm,40ppm,100ppm,150ppm and 200ppm both with bentonite and activated charcoal within a range of 20 to 60 minutes. The recyclability and regeneration of bentonite have made bentonite an excellent adsorbent of paraphenylene diame from aqueous medium.
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Anand et al. (2025) studied this question.
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