| 引用本文: | 徐元锋,庞睿峰,陈国聪,杨志仁,黄邓汉文,李正杰,刘力畅,赵小飞.氮掺杂沼渣生物炭对 Pb
2+ 的吸附性能研究(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2025，42（5）：54-62 |
| CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435 |
|
| 摘要: |
| 目的 含铅废水对人体健康和环境的破坏性影响巨大,吸附是一种成熟的除铅技术,然而,吸附高效去除
Pb
2+仍面临许多挑战,如生物炭吸附剂成本高、吸附容量低等,如何选择吸附材料以及通过改性方法提高吸附效率
至关重要。 方法 通过对餐厨沼渣生物炭进行氮化碳负载改性,在不同的溶液初始 pH 值、吸附时间及 Pb
2+初始浓
度下,研究了氮掺杂沼渣生物炭对 Pb
2+的吸附效果;并结合 SEM、BET、FTIR 和 XPS 等多种表征手段分析探讨吸附
机理。 结果 结果表明:氮掺杂使沼渣生物炭产生更多的介孔或微孔,增大了总比表面积和总孔容;含氧官能团和含
氮官能团的络合作用是 Pb
2+吸附的主要机制;氮掺杂生物炭比原始沼渣生物炭的 Pb
2+吸附效果更好,说明氮掺杂
可以有效提高生物炭对 Pb
2+的吸附能力;Langmuir 吸附等温模型和准二级动力学方程更符合其吸附特性,是单分
子层吸附,化学吸附是主要吸附方式。 结论 氮掺杂是提高沼渣生物炭对铅离子吸附容量的有效方式,具有良好的
应用前景。 |
| 关键词: 沼渣 生物炭 氮掺杂 Pb
2+去除 吸附性能 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Study on the Adsorption Performance of Nitrogen-Doped Digestate Biochar for Pb2+ |
|
XU Yuanfeng PANG Ruifeng CHEN Guocong YANG Zhiren HUANG Denghanwen LI Zhengjie LIU Lichang
ZHAO Xiaofei
|
|
Carbon Neutral Technology Application Research Center Chongqing Jiaotong University Chongqing 400074 China
|
| Abstract: |
| Objective Wastewater containing lead has a significant destructive impact on human health and the
environment. Adsorption is a well-established lead removal technology. However efficient adsorption of Pb
2+
still faces
many challenges such as high costs and low adsorption capacities of biochar adsorbents. Selecting appropriate adsorbent
materials and improving adsorption efficiency through modification methods are crucial. Methods Nitrogen-doped biochar
derived from food waste digestate was prepared by carbonization and subsequent nitrogen doping. The adsorption
performance of nitrogen-doped digestate biochar for Pb
2+
was investigated under different initial solution pH values
adsorption times and initial Pb
2+
concentrations. The adsorption mechanisms were analyzed and explored using various
characterization techniques including scanning electron microscopy SEM Brunauer-Emmett-Teller BET analysis
Fourier-transform infrared spectroscopy FTIR and X-ray photoelectron spectroscopy XPS . Results The results
showed that nitrogen doping generated more mesopores or micropores in the digestate biochar increasing the total specific
surface area and pore volume. The complexation of oxygen-containing and nitrogen-containing functional groups was the
main mechanism for Pb
2+
adsorption. The nitrogen-doped biochar exhibited better adsorption performance for Pb
2+
compared to the raw digestate biochar which indicates that nitrogen doping can effectively enhance the adsorption capacity
of biochar for Pb
2+
. The Langmuir adsorption isotherm model and pseudo-second-order kinetic equation better describe the
adsorption characteristics suggesting monolayer adsorption and chemisorption as the primary adsorption mechanisms.
Conclusion Nitrogen doping is an effective method to improve the adsorption capacity of digestate biochar for lead ions
and has promising application prospects. |
| Key words: digestate biochar nitrogen doping Pb
2+
removal adsorption performance |
