Adsorption of Oxyanions from Industrial Wastewater using Perlite‐Supported Magnetite

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.

Biotransformation of RDX and HMX by Anaerobic Granular Sludge with Enriched Sulfate and Nitrate

“…Real‐world environmental systems and conditions are complex (Huang et al, 2006; ; ; Qin et al, 2007; Verbinnen et al, 2016; Wang et al, 2014). In order to ascertain anaerobic biotransformation of RDX and HMX in the presence of nitrate‐sulfate mixture, different mixing conditions were used to assess their effects on the anaerobic biotransformation process.…”

Recycling of spent adsorbents for oxyanions and heavy metal ions in the production of ceramics

“…Adsorption experiments were performed with zeolite-and perlite-supported magnetite, prepared as described by Verbinnen et al (2012Verbinnen et al ( , 2013bVerbinnen et al ( , 2015. The adsorbents were saturated with Mo by contacting them with 50 mg/l Mo(VI) solutions.…”

“…(1.5 g/l adsorbent, 24 h contact time at 160 rpm, pH 2.9) used for the adsorption experiments were selected based on the knowledge gained in previous research (Verbinnen et al, 2012(Verbinnen et al, , 2013b(Verbinnen et al, , 2015. The adsorbents were recuperated from the solution by filtering them over a paper filter.…”

“…For column applications, nanosized materials must be coated on a larger sized carrier materials. Therefore adsorbents for oxyanions, consisting of magnetite supported by a zeolite or perlite matrix were developed (Verbinnen et al, 2012(Verbinnen et al, , 2013b(Verbinnen et al, , 2015Vaclavikova et al, 2010) One of the main questions that arises when discussing adsorption is whether or not the adsorbent can be regenerated after usage. For the adsorption of oxyanion forming elements and heavy metals on adsorbents, the regeneration of the spent adsorbent is not straightforward in most cases.…”

Effects of adding mineral adsorbents to porous concrete for enhancing the quality performance of urban runoff systems

“…Results of Verbinnen et al (2016) showed that perlite-supported magnetite is suitable for treating real wastewaters. It can remove several oxyanions simultaneously from the considered industrial wastewater.…”