2020
DOI: 10.1021/acs.est.0c02272
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Kinetics, Affinity, Thermodynamics, and Selectivity of Phosphate Removal Using Immobilized Phosphate-Binding Proteins

Abstract: A phosphate (P i )-selective adsorption system featuring immobilized P i -binding proteins (PBP) has recently attracted attention for ultralow P i removal followed by recovery. This study investigated the adsorption kinetics, affinity, thermodynamics, and selectivity, as well as the effect of pH and temperature on P i adsorption using immobilized PBP (PBP resin). Immobilizing PBP did not affect its P i affinity. Kinetic studies at 22 °C and pH 7.1 showed that the PBP resin achieved 95% of its equilibrium capac… Show more

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Cited by 40 publications
(26 citation statements)
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“…Based on such findings, the Langmuir model adequately described the adsorption data. The results are in line with many previous studies including when phosphate was adsorbed onto zirconium-modified bentonite and when phosphate-binding protein resin was implemented in phosphate removal . The diagram in Figure S6 visualizes the experimental results’ error by comparing the experimental adsorption capacity ( q exp.)…”
Section: Resultsmentioning
confidence: 99%
“…Based on such findings, the Langmuir model adequately described the adsorption data. The results are in line with many previous studies including when phosphate was adsorbed onto zirconium-modified bentonite and when phosphate-binding protein resin was implemented in phosphate removal . The diagram in Figure S6 visualizes the experimental results’ error by comparing the experimental adsorption capacity ( q exp.)…”
Section: Resultsmentioning
confidence: 99%
“…For example, biocatalysis allows removal of perchlorate in the presence of excess co-contaminating nitrate ( Hutchison et al., 2013 ), a condition where whole cells preferentially remove the nitrate. Likewise, phosphorus-binding proteins are being investigated as biosorbents, in part because of the potential to selectively recover phosphorus, even in the presence of structurally similar oxyanions such as sulfate and arsenate, which can co-adsorb to inorganic adsorbents ( Venkiteshwaran et al., 2020 , 2021 ). Even when compound recovery may not be a priority, biosorbents’ selectivity and sensitivity may still have utility, such as with ultra-low treatment targets (e.g., 10 µg/L arsenic).…”
Section: Determining When Biocatalysis or Biosorption Might Be Appropriatementioning
confidence: 99%
“…Moreover, selective biosorption processes can enable recovery of the target without contamination from other constituents (e.g. ( Venkiteshwaran et al., 2018 , 2020 )). An ideal biosorption process would leverage highly selective, sensitive, and reversible (under controlled conditions) biosorption to facilitate recovery in a concentrated, contaminant-free form suitable for reuse.…”
mentioning
confidence: 99%
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“…Reversible sorption‐based processes offer one promising approach (Beaudry and Sengupta, 2021), which is further buoyed by the potential for fundamental materials research to develop new technologies and systems that allow us to better remove, recover, and reuse P (Jones et al, 2020). Sensitive P‐selective adsorbents such as inorganic ion exchangers (e.g., Blaney et al, 2007; Mullen et al, 2019; Sengupta & Pandit, 2011; Williams et al, 2015; Zhao & Sengupta, 1998) and bioadsorbents (e.g., Hussein et al, 2020; Venkiteshwaran et al, 2018, 2020a, 2020b; Yang et al, 2016) have been developed and tested for this purpose. The May 2021 Editor's Choice article Phosphorus recovery from wastewater using pyridine‐based ion‐exchange resins: Role of impregnated iron oxide nanoparticles and preloaded Lewis acid (Cu 2+ ) by Beaudry and Sengupta (2021) further advances development, understanding, and implementation of P removal and recovery from wastewater using P‐selective ion‐exchange resins.…”
mentioning
confidence: 99%