Montmorillonite-based porous adsorbent prepared by gel casting method was used to adsorb Cr(III)-organic complexes in tanning wastewater,together with the initial concentration of 10 mg L−1. The as-porous adsorbent exhibited an excellent performance of separation. Meanwhile, its structural and morphology were characterized by TG, BET, XRD, SEM, EDS and XPS, showing that the porous adsorbent was complete hollow ball structure. And the adsorption results showed that the adsorption amount of porous adsorbent rapidly declined from 9.58 to 5.28 mg L−1, and only Cr(III) was adsorbed, when the molar ratio of Cr(III) and citrate was more than 1:5. Increased of pH was beneficial to adsorb Cr(III)-citrate in range from 2.46 to 7.12. Furthermore, the best removal efficiency of Cr(III)-organic complex was up to 97% and still above 84% after five cycles with porous adsorbent. Finally, the mechanism on adsorbing Cr(III) with porous adsorbent is also provided. Therefore, a kind of porous adsorbent which was easily separated, was prepared to deeply treat tanning wastewater containing Cr(III)-organic complex, and solve the problem of difficult recycle.
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The research was supported by Liaoning Province (Jinzhou) Fur Green Manufacturing Industry Technology Innovation Strategic Alliance , Research on resource recycling technology of tanned chromium-containing waste dander [2018020190-301], The “Seedling” Project named “Research on Graphene-based 3D Material Construction and Key Technologies for Industrialization Application” for Youth Science and Technology Talents of Education Department of Liaoning Province (LQ2020011), Study on the deep removal of heavy metal chromium from industrial wastewater in the upper reaches of Daling River estuary [BDHYYJY2020013] (This study were supported by the Open Fund of Institute of Ocean Research, Bohai University), National Natural Science Foundation of China , Innovation Team Project of Liaoning Province [LT2015001], and Innovation Team Project of Liaoning Higher University [2018479-14].
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Hao, X., Tao E, Yang, S. et al. A New Montmorillonite-Based Porous Composites: Effectively Removal of Cr(III)-Organic Complexes in Tannery Wastewater. J Polym Environ 30, 308–318 (2022). https://doi.org/10.1007/s10924-021-02193-4
- Zirconium oxide
- Porous adsorbent
- Cr(III)-organic complex