1. S. Singh, I. J. Chaudhary, and P. Kumar, “Utilization of low-cost agricultural waste for removal of toxic metals from environment: A review,” Int. J. Sci. Res. Biol. Sci. 6, 56–61 (2019).
2. G. Islamuddin, M. A. Khalid, and S. A. Ahmad, “Study of eco-friendly agricultural wastes as non-conventional low cost adsorbents: A review,” Ukr. J. Ecol. 9, 68–75 (2019).
3. P. S. Kumar, G. J. Joshiba, C. C. Femina, et al., “A critical review on recent developments in the low-cost adsorption of dyes from wastewater,” Desalin. Water Treat. 172, 395–416 (2019).
4. I. G. Shaikhiev, S. V. Sverguzova, R. Z. Galimova, et al., “Using wastes of buckwheat processing as sorption materials for the removal of pollutants from aqueous media: A review,” IOP Conf. Series: Mater. Sci. Eng. 945, 012044 (2020).
5. I. G. Shaikhiev, S. V. Sverguzova, K. I. Shaikhieva, et al., “The use of walnut shells (Juglans regia) as sorption materials for the removal of pollutants from natural and waste waters,” Khim. Rastit. Syr’ya, No. 2, 5–18 (2020).