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Every moment huge amounts of industrial wastewater are contaminating our surface/groundwater sources by discharging into the environment directly. This crude wastewater is the most problematic subject because it is the matrix of hazardous toxicants, which can drastically damage public health-safety. So, it is urgent to purify before discharging/reusing. This study focused on the recent improvement and latent implication of Activated Chitosan-Modified Coal(ACMC) bionanocomposite filter. Here, we briefly described how ACMC was produced and its potential application in the removal of Pb²⁺ and Crystal Violet (CV) effectively from wastewater. However, the influence of different parameters like initial concentration (20–40 ppm), volumetric flow rate (4–6 mL/min) and bed height (0.4–1.0 cm) were investigated appropriately meanwhile the adsorbent amount was (1.0–2.0 g). The adsorption efficiency and removal …