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Research on the Adsorption Behavior of HeavyMetal Ions by Porous Material Prepared with Silicate Tailings

1
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
2
School of Life Science, Central South University, Changsha 410012, China
*
Author to whom correspondence should be addressed.
The first two authors contributed equally to this paper.
Minerals 2019, 9(5), 291; https://doi.org/10.3390/min9050291
Received: 14 March 2019 / Revised: 1 May 2019 / Accepted: 8 May 2019 / Published: 11 May 2019
PDF [1430 KB, uploaded 11 May 2019]

Abstract

Tailings generated from mineral processing have attracted worldwide concerns due to creating serious environmental pollution. In this work, porous adsorbents were prepared as a porous block by using silicate tailings, which can adsorb heavy metal ions from the solution and are easy to separate. The synthesized silicate porous material (SPM) was characterized by X-ray diffraction (XRD), Brunner–Emmet–Teller (BET), and scanning electron microscope (SEM). The material presented a surface area of 3.40 m2⸱g−1, a porosity of 54%, and the compressive strength of 0.6 MPa. The maximum adsorption capacities of Pb2+, Cd2+, and Cu2+ by SPM were 44.83 mg·g−1, 35.36 mg·g−1, and 32.26 mg·g−1, respectively. The experimental data were fitted well by the Freundlich and Langmuir adsorption models. The kinetics of the adsorption process were fitted well by the pseudo-first order kinetic equation. These results show that the porous materials prepared with silicate tailings could act as an effective and low-cost adsorbent for the removal of heavy metal ions from wastewater. This study may provide a new thought on the high-value utilization of tailing for alleviating environmental pressure.
Keywords: heavy metals removal; solid waste; silicate porous material; water dispose; recycling heavy metals removal; solid waste; silicate porous material; water dispose; recycling
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ouyang, D.; Zhuo, Y.; Hu, L.; Zeng, Q.; Hu, Y.; He, Z. Research on the Adsorption Behavior of HeavyMetal Ions by Porous Material Prepared with Silicate Tailings. Minerals 2019, 9, 291.

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