β-环糊精改性磁性丝瓜生物炭对废水中Ni(II)的高效去除

IF 3.5 4区 工程技术 Q3 ENERGY & FUELS
Wang Xueping, Zhang Zhe
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引用次数: 0

摘要

本研究制备了一种β-CD修饰的磁性丝瓜生物炭吸附剂(LB-MCD),并通过其不同的物理和化学性质证明了其复合材料的成功。该吸附剂具有优良的比表面积(29.46 m2 g−1)和磁分离能力(磁化强度为18.78 emu g−1),在外加磁场作用下可在50s内快速分离废水中的氨氮。吸附过程与准二级动力学模型和Langmuir模型(Langmuir模型拟合值为83.3 mg g−1)具有良好的相关性,吸附在约90 min内达到平衡,吸附过程以单层吸附为主,吸附过程为自发吸附和吸热过程。LB-MCD具有优良的循环性能,在LB-MCD投加量为0.06 g、Ni(II)浓度为7.65 mg g−1、吸附时间为100 min、pH = 7的条件下,循环8次后其初始容量仍为80%。LB-MCD在各种水环境(包括去离子水、自来水、湖水和工业废水)中表现出优异的Ni(II)去除率(R% > 90)。综上所述,LB-MCD是一种环保型、高效的去除废水中Ni(II)的吸附剂。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
β-Cyclodextrin modified magnetic luffa biochar for efficient removal of Ni(II) from wastewater

In this study, a β-CD modified magnetic loofah biochar adsorbent (LB-MCD) was fabricated and its successful composite was demonstrated using diverse physical and chemical properties. The adsorbent has excellent specific surface area (29.46 m2 g−1) and magnetic separation ability (magnetization strength of 18.78 emu g−1) and can rapidly separate ammonia nitrogen from wastewater within 50 s under the action of an applied magnetic field. The adsorption process was well correlated with the quasi-secondary kinetic model and Langmuir model (the Langmuir model fit value was 83.3 mg g−1), and the adsorption reached the equilibrium in about 90 min, which was mainly carried out by monolayer adsorption, and the adsorption process was spontaneous and heat-absorbing. The LB-MCD had an excellent cycling performance, and its initial capacity (the dosage of LB-MCD was 0.06 g, the concentration of Ni(II) was7.65 mg g−1, adsorption time was 100 min, and the pH = 7) was still 80% after 8 cycles of experiments. The LB-MCD showed excellent Ni(II) removal (R% > 90) in various aqueous environments, including deionized water, tap water, lake water, and industrial wastewater. In conclusion, LB-MCD is an eco-friendly and potent adsorbent for the removal of Ni(II) from wastewater.

Graphical Abstract

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来源期刊
Biomass Conversion and Biorefinery
Biomass Conversion and Biorefinery Energy-Renewable Energy, Sustainability and the Environment
CiteScore
7.00
自引率
15.00%
发文量
1358
期刊介绍: Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.
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