Application of response surface methodology and box–behnken design for the optimization of mercury removal by Ulva sp.

• DOI: 10.1016/j.jhazmat.2022.130405
• Publication Date: 2022-11-17T03:53:26Z
• Authors: Nicole Ferreira; Thainara Viana; Bruno Henriques; Daniela S. Tavares; Jéssica Jacinto; João Colónia; João Pinto; Eduarda Pereira
• Keywords: Box–Behnken design; Mercury

Mercury (Hg) is a global and top priority contaminant, toxic at low concentrations. Although it has been progressively eliminated from processes, this metal continues to circulate in the atmosphere, soil, water. In work, Response Surface Methodology (RSM) combined with Box-Behnken Design (3 factors - 3 levels) was used optimize key operational conditions that influence removal uptake of Hg by living macroalga Ulva sp. complex mixture containing several elements industry (potentially elements, rare earth platinum-group elements) (initial concentration 10, 100 190 µg/L, salinity 15, 25 35, seaweed stock density 1.0, 3.0 5.0 g/L). Results evidenced great capability remove Hg, efficiencies between 69 % 97 %. 3-D surfaces showed most impactful variable density, higher densities leading removal. Regarding uptake, positive correlation initial qt values observed. The appliance RSM made possible obtain optimal operating for removing virtually waters high ionic strength, which pivotal step direction application remediation biotechnology large scale.