PREPARATION OF PUMICE BASED ON CONSTRUCTION WASTE AND ITS ADSORPTION PERFORMANCE ON HEAVY METALS

QI Xiaoxue; ZHANG Chen; YU Jianghua

doi:10.13205/j.hjgc.202208024

Volume 40 Issue 8

Nov. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(8): 171-177

QI Xiaoxue, ZHANG Chen, YU Jianghua. PREPARATION OF PUMICE BASED ON CONSTRUCTION WASTE AND ITS ADSORPTION PERFORMANCE ON HEAVY METALS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 171-177. doi: 10.13205/j.hjgc.202208024

Citation:

QI Xiaoxue, ZHANG Chen, YU Jianghua. PREPARATION OF PUMICE BASED ON CONSTRUCTION WASTE AND ITS ADSORPTION PERFORMANCE ON HEAVY METALS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 171-177. doi: 10.13205/j.hjgc.202208024

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PREPARATION OF PUMICE BASED ON CONSTRUCTION WASTE AND ITS ADSORPTION PERFORMANCE ON HEAVY METALS

doi: 10.13205/j.hjgc.202208024

School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China

Received Date: 2021-09-29
Publish Date: 2022-11-08

Abstract

Abstract

In this paper, new pumice was prepared with waste glass and cement blocks, and its adsorption effect and competition effect on Cr³⁺, As³⁺, Pb²⁺, Cu²⁺ and Zn²⁺ were studied. The adsorption kinetics model, adsorption isotherm model and Fourier infrared spectroscopy were used to study the removal of heavy metals, and the recycling performance of pumice was investigated. The results showed that the adsorption capacity of pumice for Cr³⁺, As³⁺, Pb²⁺, Cu²⁺ and Zn²⁺ were 64, 110, 79, 161, 161 μg/mg, respectively. The adsorption of heavy metals was mainly related to the functional groups and chemical bonds on the surface. The adsorption process fitted well with the quasi-second-order kinetic model, and the adsorption isotherms was well simulated by Langmuir model and Freundlich model. When the five heavy metals coexisted, the adsorption competition reflected the adsorption preference by pumice, and the removal rate of the heavy metal ions followed the order of Cr³⁺>Cu²⁺>Zn²⁺>As³⁺>Pb²⁺. After six cycles, the removal rate of five heavy metals was still above 50%, indicating that the new pumice had good adsorption and recycling performance. The pumice adsorbent prepared with construction waste conformed to the concept of Using Waste to Treat Waste and had broad application prospects.
- waste glass,
- waste cement block,
- pumice,
- heavy metal,
- adsorption

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References(31)

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