Kinetics study of lead adsorption using Poincianella pluviosa var. Peltophoroides (Benth.) L. P. Queiroz biochar
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DOI:
https://doi.org/10.6008/CBPC2179-6858.2020.006.0038Keywords:
Lead, Adsorption, Biochar, Poincianella pluviosa var. peltophoroides (Benth.) L. P. QueirozAbstract
Large amounts of polluting substances are dumped daily into water bodies due to agricultural, chemical and industrial processes and many of them, such as heavy metals, are not removed by the usual facilities inf treatment plants. There are several types of technologies available for the treatment of hazardous contaminants and one of them is the adsorption, which presents low cost and easy operation. The objective of this work was to study the potential of lead adsorption by biochar of Poincianella pluviosa var. peltophoroids (Benth.) L. P. Queiroz in aqueous samples. The pruning residues were thermally treated for obtaining biochar and then kinetics tests of 24 hours were performed using 1 g of the adsorbent previously prepared in contact with a lead solution 100 mg/L. The pseudo-first order and pseudo-second order models were fitted to the experimental data. It was achieved 100% of lead removal in the kinectics studies, and the equilibrium was adopted in 360 min. The data was better adjusted with pseudo-second-order model. The results obtained were able to prove the adsorption of lead by coal of pruning residues of Poincianella pluviosa var. peltophoroides (Benth.) L. P. Queiroz.
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