Adsorptive removal of Pb2+ from wastewater using ZnO-Biochar nanocomposite

초록

The discharge of lead (Pb2+) from industries, which is harmful to water, human health and food chain, poses a serious risk. Due to the remarkable ability of ZnO biochar nanocomposite to remove Pb-2(+) from wastewater, it gained significant attention in environmental research. This study was conducted to determine how effectively the prepared ZnO-Biochar nanocomposite removed Pb-2(+) from wastewater. Fourier transmission infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to examine the functional groups and surface morphology of the ZnO-Biochar nanocomposite, respectively. The structure of ZnO-Biochar nanocomposite with rough and porous surface performed the positive association in surface adsorption of Pb-2(+) pollutant. A batch-experimentation conducted under a variety of conditions, including initial Pb-2(+) concentration (50-200 mg L--(1)), adsorbent dosage (0.05-0.25 g), pH (2-12), and contact time (0-240 min) to evaluate the removal rates as well as adsorption capacities, within an emphasis on environmental impact. This study proves that ZnO-Biochar nanocomposite has a 90.30% removal rate for Pb-2(+). The ZnO-Biochar nanocomposite proved an impressive maximum adsorption capacity (qmax) of 79.302 mg/g, as determined through the implementation of the Langmuir model. A linear pseudo-first order and pseudo-second order model having R2 values of 0.867 and 0.899 respectively, show the best fit for the experimental data concerning Pb-2(+). Experiments conducted in this work demonstrate the exciting potential of the prepared material for promoting sustainable treatment of industrial wastewater.

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