摘要
以小麦秸秆生物炭(BC)作为载体,采用原位聚合法,通过控制BC热解温度和N-苯基甘氨酸/生物炭(NPG/BC)质量比等合成条件,制备了一系列生物炭/聚(N-苯基甘氨酸)(BC/PNPG)复合吸附剂,研究合成条件对Sb(Ⅲ)吸附性能的影响,并通过SEM、FT-IR和XPS等表征手段揭示吸附机理。结果表明,BC对Sb(Ⅲ)的吸附量随热解温度的升高而增大,最大为7.55mg/g。热解温度为800℃、NPG/BC质量比为5∶5、合成环境为酸性条件下,制备的BC_3/PNPG-5∶5-S对Sb(Ⅲ)的吸附量为17.65mg/g,是BC的2.3倍。该复合吸附剂对Sb(Ⅲ)的吸附机制包括苯胺基与Sb(Ⅲ)的螯合作用、带正电荷的质子化双极化子对Sb(Ⅲ)的氧化作用和带正电的PNPG与Sb(OH)_(6)^(-)之间的静电相互作用。
A series of biochar/poly(N-phenylglycine)(BC/PNPG)composite adsorbents were prepared by in-situ polymerization method through controlling the biochar pyrolysis temperature and N-phenylglycine/biochar(NPG/BC)mass ratio.The influence of the synthesis conditions on the adsorption performance of Sb(Ⅲ)was studied,and the adsorption mechanism was revealed by SEM,FT-IR and XPS.The results showed that the adsorption capacity of Sb(Ⅲ)increased with the increase of pyrolysis temperature,and the maximum was 7.55mg·g^(-1).The adsorption capacity of BC 3/PNPG prepared under the conditions of pyrolysis temperature of 800℃,NPG/BC mass ratio of 5∶5,and acidic environment was 17.65mg·g^(-1),which was 2.3 times that of the pristine BC.The adsorption mechanism of the composite adsorbent for Sb(Ⅲ)included the chelation of aniline group with Sb(Ⅲ),the oxidation of Sb(Ⅲ)by protonated bipolarizers with positive charge,and the electrostatic interaction between positively charged PNPG with Sb(OH)_(6)^(-).
作者
牛梦娴
洪思奇
张洛红
Niu Mengxian;Hong Siqi;Zhang Luohong(School of Environmental and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710048)
出处
《化工新型材料》
北大核心
2025年第1期213-218,共6页
New Chemical Materials
基金
陕西省重点研发计划项目(2023-YBNY-260)
西安工程大学科研计划项目(310/107020511)。
关键词
生物炭
N-苯基甘氨酸
吸附
重金属
锑
biochar
N-phenylglycine
adsorption
heavy metal
antimony
作者简介
牛梦娴(2000-),女,硕士研究生,主要从事生物炭基材料高值化应用研究工作,E-mail:1050802900@qq.com;通讯作者:洪思奇(1986-),女,高级工程师,博士,从事环境功能材料开发和工业废水深度处理技术研究,E-mail:hongsiqi@xpu.edu.cn。
