Ultimate selenium(IV) monitoring and removal from water using a new class of organic ligand based composite adsorbent

Journal of Hazardous Materials
Md Rabiul AwualHideaki Shiwaku

Abstract

This work reports the selenium (Se(IV)) detection and removal from water by ligand functionalized organic-inorganic based novel composite adsorbent. The composite adsorbent was prepared by direct immobilization of N,N'-di(3-carboxysalicylidene)-3,4-diamino-5-hydroxypyrazole onto the mesoporous silica monolith. The adsorbent exhibited distinct color change in the presence of various concentrations of Se(IV). This was characterized by UV-vis spectroscopy, and the color change was observed by naked-eye observation. The detection limit was determined to be 1.14 μg/L. The effect of solution pH, interferential metal ions, contact time, initial Se(IV) concentration, and adsorbent regeneration were evaluated. The maximum sorption capacity was determined based on the initial concentration. The data fitted well to the Langmuir isotherm model, and the maximum Se(IV) sorption capacity was 111.12 mg/g. The presence of diverse competing ions did not affect the Se(IV) sorption capacity, and the adsorbent had almost no sorption capacity for these coexisting ions, which suggests the high selectivity to Se(IV) ions. The adsorbed Se(IV) was eluted with suitable eluent (0.10 M NaOH) and simultaneously regenerated into the initial form for the next...Continue Reading

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Citations

Jun 11, 2016·International Journal of Phytoremediation·M S Podder, C B Majumder
May 28, 2019·Environmental Science and Pollution Research International·Muhammad SalmanFarrukh Mansoor
Feb 8, 2021·Ecotoxicology and Environmental Safety·Tarek A ShalabyAndré Rodrigues Dos Reis
Jun 10, 2020·Journal of Hazardous Materials·Licheng ZhangXuexue Song
Aug 16, 2019·The Science of the Total Environment·Kyriaki KalaitzidouManassis Mitrakas
Jun 13, 2021·Journal of Environmental Management·Izba Ali, Vaibhav Shrivastava

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