纳米复合材料ZrO2@rGO吸附脱除水溶液中的阿散酸

doi:10.11896/cldb.20110076

材料导报

2022, Vol. 36

Issue (17): 20110076-6 https://doi.org/10.11896/cldb.20110076

无机非金属及其复合材料

纳米复合材料ZrO₂@rGO吸附脱除水溶液中的阿散酸

朱孟亚, 邹善娟, 尤楠^*

辽宁石油与化工大学石油化工学院,辽宁抚顺 113001

ZrO₂@rGO Nanocomposites for Adsorptive Removal of Arsanilic Acid from Aqueous Solution

ZHU Mengya, ZOU Shanjuan, YOU Nan^*

College of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China

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摘要阿散酸(ASA)是一种应用广泛的有机砷类兽药,因其潜在的环境危害而受到关注。本工作采用水热一锅法在还原氧化石墨烯(rGO)表面上原位生长了ZrO₂纳米颗粒,将制备得到的ZrO₂@rGO纳米复合材料用于吸附去除ASA。通过透射电镜和扫描电镜观察发现,直径为20~50 nm的ZrO₂纳米颗粒较均匀、致密地分布在rGO表面;XRD结果显示ZrO₂纳米颗粒的晶型为单斜晶和四方晶的混合相。吸附试验结果表明:ZrO₂@rGO对ASA的吸附容量为177.9 mg·g^-1,其能够在45 min达到对ASA的吸附去除平衡; 在pH=2.9~7.1时,pH值对ASA的吸附去除没有显著影响;当pH>7.1时,随着pH值的增大,ASA的吸附量变小;在25~45 ℃下,随着温度的升高,ZrO₂@rGO对ASA的吸附量也增大; 当离子强度小于0.1 mol·L^-1时,离子强度对ZrO₂@rGO吸附去除ASA没有显著影响;经过五次吸附-解吸循环后,再生的ZrO₂@rGO对ASA的吸附量仍能达到新鲜ZrO₂@rGO吸附量的85%;ASA在ZrO₂@rGO表面的吸附过程可用Langmuir模型和准二级动力学方程来描述。

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关键词: 纳米复合材料有机砷吸附去除

Abstract: Arsanilic acid (ASA), a widely used organic-arsenic veterinary drug, has greatly attracted attention due to its potential environmental threat.This work reported a ZrO₂@rGO nanocomposite with ZrO₂ nanoparticles growing on reduced graphene oxide (rGO) by a one-pot method for adsorptive removal of ASA from aqueous solution. The ZrO₂ nanoparticles 20—50 nm in diameter are relatively evenly and densely covered on the rGO surface according to the observation of transmission and scanning electron microscope. X-ray diffraction patterns of ZrO₂@rGO indicate the mixture of the monoclinic and tetragonal phases of ZrO₂. The adsorptive capacity of ASA by the ZrO₂@rGO is 177.9 mg·g^-1, and the adsorption equilibrium of ASA by the ZrO₂@rGO can be achieved within 45 min. The adsorption amount of ASA is independent of pH in the range of 2.9—7.1, decreases at pH>7.1 and increases with the increase in temperature from 25 ℃ to 45 ℃. The removal of ASA by the ZrO₂@rGO is independent of ionic strengths below 0.1 mol·L^-1. After five cycles of the adsorption-desorption, the adsorptive amount of ASA by the regenerative ZrO₂@rGO can retain 85% of that by the fresh sorbents. The adsorption process of ASA by the ZrO₂@rGO can be described by the Langmuir and the pseudo-second-order equations.

Key words: nanocomposites organic-arsenic adsorptive removal

出版日期: 2022-09-10 发布日期: 2022-09-10

ZTFLH:

O647.3

基金资助: 辽宁省自然科学基金-沈阳材料科学国家(联合)实验室联合开放基金(2015021019)

通讯作者: ^*younan_77@163.com

作者简介: 朱孟亚,本科毕业于河南科技学院制药工程专业,现为辽宁石油化工大学化学专业硕士研究生,主要研究方向为环境功能材料。
尤楠, 高级工程师,毕业于武汉理工大学化学工程与工艺专业,主要研究方向为环境功能材料和环境分析化学。在国内外学术期刊上发表论文20余篇,申请国家发明专利2项。

引用本文:

朱孟亚, 邹善娟, 尤楠. 纳米复合材料ZrO₂@rGO吸附脱除水溶液中的阿散酸[J]. 材料导报, 2022, 36(17): 20110076-6.
ZHU Mengya, ZOU Shanjuan, YOU Nan. ZrO₂@rGO Nanocomposites for Adsorptive Removal of Arsanilic Acid from Aqueous Solution. Materials Reports, 2022, 36(17): 20110076-6.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.20110076 或 http://www.mater-rep.com/CN/Y2022/V36/I17/20110076

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