Experimental evaluation demonstrates effective fluoride removal from contaminated water using an aluminum-iron adsorbent, highlighting its viability for practical drinking water purification.
Fluoride contamination of water is a major problem in India. World Health Organization (WHO 2004) recommends an upper limit of 1.5 mg/L fluoride in drinking water. Present study reveals performance evaluation studies of Al-Fe-Ac based adsorbent for the fluoride removal from drinking water. The prepared adsorbent was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM).The material retained amorphous structure and maintained relatively stable fluoride adsorption performance at calcination temperatures around 300 C. The optimum pH range for fluoride adsorption was 6.0-7.0 and the adsorbent also showed high defluoridation ability around pH 5.5-7.5, which is preferable for actual application. A high fluoride adsorption capacity of 4.5 mg/g was acquired for fluoride concentration of 50 mg/L, adsorbent dose of 1g/L and pH 7.0. Synthetic samples having fluoride concentration 2 to 10 mg/L were treated at optimized dosage and residual fluoride was reduced to 0.1 to 1.4 ppm with different adsorbent dose. Residual aluminium in treated water was well within WHO norms for drinking water.
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Solanki et al. (2019) studied this question.
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