Dataset for: Effect of Varying Sodium Alginate Concentration on Coconut Husk Waste Biochar–Sodium Alginate Composite Beads for the Removal of Lead (Pb²⁺) in Aqueous Solution

This dataset contains all raw and processed data supporting the findings of the study entitled "Effect of Varying Sodium Alginate Concentration on Coconut Husk Waste Biochar–Sodium Alginate Composite Beads for the Removal of Lead (Pb²⁺) in Aqueous Solution." The dataset includes Atomic Absorption Spectroscopy (AAS) measurements for lead removal efficiency and adsorption capacity, pseudo-first-order (PFO) and pseudo-second-order (PSO) kinetic modeling parameters, Fourier Transform Infrared Spectroscopy (FTIR) spectral data, and Scanning Electron Microscopy (SEM) images of all five adsorbent treatments: pure coconut husk biochar, pure sodium alginate beads, and 1%, 2%, and 3% (w/v) coconut husk biochar–sodium alginate composite beads. Data were obtained through batch adsorption experiments conducted at a fixed initial lead concentration, contact time, and pH. Statistical analysis was performed using one-way ANOVA to determine significant differences among treatments.