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Adsorption of Oxyanions from Industrial Wastewater using Perlite‐Supported Magnetite
Author(s) -
Verbinnen Bram,
Block Chantal,
Vandecasteele Carlo
Publication year - 2016
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143015x14362865226932
Subject(s) - perlite , adsorption , magnetite , oxyanion , chemistry , wastewater , industrial wastewater treatment , nuclear chemistry , inorganic chemistry , chromatography , materials science , organic chemistry , environmental engineering , metallurgy , catalysis , environmental science
ABSTRACT: Most studies on oxyanion adsorption focus on their removal from synthetic solutions. It is often claimed that the considered adsorbents can be used to treat real (industrial) wastewaters, but this is seldom tested. Perlite‐supported magnetite was characterized first by determining its specific surface area, magnetite content and by examining the coating. Tests on a synthetic solution showed that at the ideal pH values (pH 3 to 5), the order of adsorption is Mo(VI) > As(V) > Sb(V) > Cr(VI) > Se(VI). Most oxyanions can be removed for more than 75% with an adsorbent dosage of 1 g/l. Furthermore, perlite‐supported magnetite has a higher removal efficiency for oxyanions than commercially available adsorbents and comparable adsorbents described in literature. Perlite‐supported magnetite is suitable for treating real wastewaters: it can remove several oxyanions simultaneously from the considered industrial wastewater, but the adsorption order changes due to the presence of interfering anions.