期刊论文

Yang, Bin(932936624@qq.com)

中文

复合材料学报

1000-3851

2022

39

1

222-231

10.13801/j.cnki.fhclxb.20210320.001

21177053:国家自然科学基金 CX20200940:湖南省研究生科研创新项目

本校为第一且通讯机构

以卷烟废弃烟末为原材料,对其进行碳化处理后再引入氨基功能团制备氨化烟末生物碳吸附剂(NH_2/TPB),研究pH、投加量、温度、吸附时间对NH_2/TPB吸附Cr(Ⅵ)的影响。通过扫描电镜(SEM)、傅里叶红外光谱(FTIR)、X射线光电子能谱(XPS)等技术进行机制分析。结果表明:初始浓度为210 mg/L、pH= 4、投加量为0.8 g/L、温度为45℃、吸附时间为120 min时,NH_2/TPB对Cr(Ⅵ)的最大吸附量为103.627 mg/g。吸附过程符合准二级动力学模型和Langmuir吸附等温模型。Cr(Ⅵ)吸附去除机制主要包括静电相互作用、还原反应以及与-NH_2、-OH、-COOH的配位络合,与Si-O-Si的"π-π"相互作用。通过5次吸附-解吸试验发现,Cr(...

Using the waste cigarette leave powder residue as raw materials, after carbonization, the amino functional group was introduced to prepare the ammoniated tobacco leave powder residue biochar (NH2/TPB), and the effects of pH, dosage, temperature and adsorption time on NH2/TPB adsorption of Cr(Ⅵ) were studied. The mechanism was analyzed by scanning electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and other techniques. The results show that when the initial concentration is 210 mg/L, pH=4, do...