Pires, Viviane das Graças RodriguesLima, Diego Roberto de SousaAquino, Sergio Francisco deLibânio, Marcelo2016-01-282016-01-282015PIRES, V. G. R. et al. Evaluating arsenic and manganese removal from water by chlorine oxidation followed by clarification. Brazilian Journal of Chemical Engineering, v. 32, n. 2, p. 409-419, 2015. Disponível em: <http://www.scielo.br/pdf/bjce/v32n2/0104-6632-bjce-32-2-0409.pdf>. Acesso em: 21 out. 2015.0104-6632http://www.repositorio.ufop.br/handle/123456789/6259This paper investigates the simultaneous removal of arsenic [As(V) or As(III)] and manganese [Mn(II)] from natural waters of low and high turbidity by clarification (with polyaluminum chloride and aluminum sulfate as primary coagulants) associated or not with chlorine pre-oxidation. The results showed that the clarification process exhibited low Mn(II) removal, that varied from 6% to 18% and from 19% to 27% for natural waters of low and high turbidity, respectively. The use of chlorine as pre-oxidant increased Mn(II) removal up to 77% and was associated with the formation of birnessite. Regarding As(V) removal by clarification, particularly for high turbidity water, a concentration lower than that established by the National Drinking Water Quality Standards (10 μg.L-1) was achieved in almost all tests. Oxidation preceding the clarification led to AsIII removal efficiencies from 80% to 90% for both coagulants and types of waterpt-BRArsenicManganeseClarificationOxidationWater treatmentArtigo publicado em periodicoTodo o conteúdo do periódico Brazilian Journal of Chemical Engineering, exceto onde identificado, está sob uma licença Creative Commons que permite copiar, distribuir e transmitir o trabalho em qualquer suporte ou formato desde que sejam citados o autor e o licenciante. Não permite o uso para fins comerciais. Fonte: Brazilian Journal of Chemical Engineering <http://www.scielo.br/scielo.php?script=sci_serial&pid=0104-6632&lng=en&nrm=iso>. Acesso em: 20 ago. 2019.http://dx.doi.org/10.1590/0104-6632.20150322s00003564