GUILHEN, S.N.COLETI, J.TENORIO, J.A.S.FUNGARO, D.A.2019-08-012019-08-012019GUILHEN, S.N.; COLETI, J.; TENORIO, J.A.S.; FUNGARO, D.A. Influence of adsorption parameters on uranium adsorption capability by biochar derived from macauba coconut residue. <b>Brazilian Journal of Radiation Sciences</b>, v. 7, n. 2A, p. 1-14, 2019. DOI: <a href="https://dx.doi.org/10.15392/bjrs.v7i2A.590">10.15392/bjrs.v7i2A.590</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/29995.2319-0612http://repositorio.ipen.br/handle/123456789/29995Biochar (BC) is a carbon-rich product obtained when biomass is thermally decomposed at relatively low temperatures (under 700ºC) and limited supply of oxygen in a process called pyrolysis. Because of its porous structure, charged sur-face and surface functional groups, BC exhibits a great potential as an adsorbent. Its characteristics strongly depend on the feedstock and the pyrolysis conditions. The aim of this study was to evaluate the adsorption potential for the remov-al of uranium, U(VI) from aqueous solutions using BC obtained through slow pyrolysis of the macauba coconut endo-carp. The influence of parameters such as pH, sorbent dose and initial concentration on the adsorption of U(VI) was investigated. The BC obtained at 350 °C (BC350) presented a removal percentage of approx. 80 %, demonstrating its applicability for the treatment of uranium contaminated aqueous solutions.1-14openAccessadsorptionuraniumcharsbiological materialsconcentration ratiococonut palmstemperature dependencewaste waterpyrolysisph valueArtigo de periódico2A710.15392/bjrs.v7i2A.5900000-0003-1618-0264https://orcid.org/0000-0003-1618-0264https://orcid.org/0000-0003-2604-1225Sem Percentil