基于建筑废弃物的轻石制备及其对重金属的吸附性能

齐晓雪; 张宸; 于江华

doi:10.13205/j.hjgc.202208024

基于建筑废弃物的轻石制备及其对重金属的吸附性能

doi: 10.13205/j.hjgc.202208024

南京信息工程大学环境科学与工程学院, 南京 210044

基金项目:

国家重点研发计划(2018YFD0900805)

详细信息

作者简介:
齐晓雪(1998-),女,硕士研究生,主要研究方向为水污染控制。20201248126@nuist.edu.cn

通讯作者:
于江华(1980-),男,博士,教授,主要研究方向为水污染控制与固废资源化。yujh@nuist.edu.cn

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出版历程
- 收稿日期: 2021-09-29
- 刊出日期: 2022-11-08

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

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

摘要

摘要: 利用废弃玻璃和水泥块制备一种新型轻石,研究了其对Cr³⁺、As³⁺、Pb²⁺、Cu²⁺、Zn²⁺的吸附效果及吸附竞争影响。采用吸附动力学模型、吸附等温模型和傅里叶红外光谱研究其吸附作用,并考察了轻石的循环使用性能。结果表明:轻石对Cr³⁺、As³⁺、Pb²⁺、Cu²⁺、Zn²⁺的吸附量分别为64,110,79,161,161 μg/mg;轻石吸附重金属主要与其表面的官能团和化学键有关,吸附过程更符合准二级动力学模型,吸附等温线均可由Langmuir和Freundlich模型较好模拟;当5种重金属共存时,吸附竞争性。5种重金属离子的去除率顺序为Cr³⁺＞Cu²⁺＞Zn²⁺＞As³⁺＞Pb²⁺;使用0.1 mol/L的HCl作为解吸剂,轻石经过6次循环使用后,5种重金属的去除率仍在50%以上,说明新型轻石具有良好的吸附性能和循环使用性能,所制备的新型轻石吸附剂符合当下"以废治废"的治理趋势,具有广阔的应用前景。
- 废弃玻璃 /
- 废弃水泥块 /
- 轻石 /
- 重金属 /
- 吸附
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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基于建筑废弃物的轻石制备及其对重金属的吸附性能

doi: 10.13205/j.hjgc.202208024

作者简介:
齐晓雪(1998-),女,硕士研究生,主要研究方向为水污染控制。20201248126@nuist.edu.cn

通讯作者:
于江华(1980-),男,博士,教授,主要研究方向为水污染控制与固废资源化。yujh@nuist.edu.cn

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

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基于建筑废弃物的轻石制备及其对重金属的吸附性能

doi: 10.13205/j.hjgc.202208024

作者简介: 齐晓雪(1998-),女,硕士研究生,主要研究方向为水污染控制。20201248126@nuist.edu.cn

通讯作者: 于江华(1980-),男,博士,教授,主要研究方向为水污染控制与固废资源化。yujh@nuist.edu.cn

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

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友情链接

作者简介:
齐晓雪(1998-),女,硕士研究生,主要研究方向为水污染控制。20201248126@nuist.edu.cn

通讯作者:
于江华(1980-),男,博士,教授,主要研究方向为水污染控制与固废资源化。yujh@nuist.edu.cn