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Minerals 2019, 9(2), 74; https://doi.org/10.3390/min9020074

Green Preparation of Nanoporous Pyrrhotite by Thermal Treatment of Pyrite as an Effective Hg(Ⅱ) Adsorbent: Performance and Mechanism

Laboratory for Nano-minerals and Environmental Materials, School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
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Received: 10 November 2018 / Revised: 13 January 2019 / Accepted: 22 January 2019 / Published: 27 January 2019
(This article belongs to the Special Issue Nanomineralogy)
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Abstract

The removal of Hg(II) from aqueous solutions by pyrrhotite derived from the thermal activation of natural pyrite was explored by batch experiments. The adsorption isotherms demonstrated that the sorption of Hg(II) by modified pyrite (MPy) can be fitted well by the Langmuir model. The removal capacity of Hg(II) on MPy derived from the Langmuir model was determined to 166.67 mg/g. The adsorption process of Hg(II) on MPy was well fitted by a pseudo-second-order model. The sorption of Hg(II) on MPy was a spontaneous and endothermic process. The removal of Hg(II) by MPy was mainly attributed to a chemical reaction resulting in cinnabar formation and the electrostatic attraction between the negative charges in MPy and positive charges of Hg(II). The results of our work suggest that the thermal activation of natural pyrite is greatly important for the effective utilization of ore resources for the removal of Hg(II). View Full-Text
Keywords: pyrite; thermal treatment; pyrrhotite; Hg(II) removal; mechanism pyrite; thermal treatment; pyrrhotite; Hg(II) removal; mechanism
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Lu, P.; Chen, T.; Liu, H.; Li, P.; Peng, S.; Yang, Y. Green Preparation of Nanoporous Pyrrhotite by Thermal Treatment of Pyrite as an Effective Hg(Ⅱ) Adsorbent: Performance and Mechanism. Minerals 2019, 9, 74.

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