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Column adsorption and regeneration study of magnetic biopolymer resin for perchlorate removal in presence of nitrate and phosphate

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dc.contributor.authorPan, J.
dc.contributor.authorGao, B.
dc.contributor.authorSong, W.
dc.contributor.authorXu, X.
dc.contributor.authorJin, B.
dc.contributor.authorYue, Q.
dc.date.issued2019
dc.description.abstractA magnetized and quaternary amine-functionalized bio-resin derived from corn stalk (CS-MNB) was successfully synthesized and applied for perchlorate removal by combining of column adsorption and biological/chemical regeneration in presence of nitrate and phosphate. Characterization by SEM, TEM, XRD, Zeta potential, BET and XPS revealed that CS-MNB had well-developed pore structure, large surface area and lots of quaternary-amine groups, enhancing the diffusion and removal of anion. Column adsorption of co-anions was investigated considering the bed depths, flow rates, influent pHs and anion concentrations using CS-MNB. The performance of fixed-bed column was optimal at the condition of bed depth of 2.15 cm, flow rate of 5 mL/min, and pH 4. The maximum adsorption capacities of CS-MNB were calculated to be 23.16, 6.48 and 48.73 mg/g for perchlorate, nitrate and phosphate, respectively. These three anions could be efficiently removed by the magnetic bio-resin, through an ion-exchange reaction between Cl− in quaternary amine groups and the dissolved anions. After being adsorbed by the bio-resin, the concentrated anions could be efficiently bio-reduced by the acclimated sludge predominated by Proteobacteria species. The simultaneous perchlorate and nitrate reductions were achieved by biological regeneration, although a lower bio-regeneration efficiency (26–89%) was observed as compared with that of chemical regeneration (90–93%).
dc.description.statementofresponsibilityJingwen Pan, Baoyu Gao, Wen Song, Xing Xu, Bo Jin, Qinyan Yue
dc.identifier.citationJournal of Cleaner Production, 2019; 213:762-775
dc.identifier.doi10.1016/j.jclepro.2018.12.085
dc.identifier.issn0959-6526
dc.identifier.issn1879-1786
dc.identifier.urihttp://hdl.handle.net/2440/122049
dc.language.isoen
dc.publisherElsevier
dc.rights© 2018 Elsevier Ltd. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.jclepro.2018.12.085
dc.subjectBio-resin; column adsorption; perchlorate; co-anion; regeneration
dc.titleColumn adsorption and regeneration study of magnetic biopolymer resin for perchlorate removal in presence of nitrate and phosphate
dc.typeJournal article
pubs.publication-statusPublished

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