病死猪热解炭化物的特性及其对水中Cu2+的去除

研究了病死猪热解炭化物对水中Cu~(2+)的去除效果,并借助扫描电子显微镜、X射线光谱仪及傅里叶红外光谱仪等分析手段对病死猪热解得到的炭化物理化学性质进行了表征,分析了其微观结构及官能团.结果发现,病死猪热解炭化物内部具有大量孔状结构,表面出现了PO3-4等结构.最后,利用热解得到的炭化物对水中的Cu~(2+)进行处理研究,考察了初始p H值、反应温度、吸附时间等对水中Cu~(2+)去除效果的影响.结果表明,病死猪热解炭化物对水中Cu~(2+)的吸附效果较好,最佳初始p H值为5.0,温度的升高有利于热解炭化物对Cu~(2+)的去除.通过对实验数据进行动力学及吸附等温线分析,发现实验中使用的病死猪热解炭化物对Cu~(2+)的吸附动力学数据符合准二级吸附动力学方程,Langmuir模型能较好地描述Cu~(2+)在猪热解炭化物上的吸附行为.

Characterizations of dead pigs' carbonization material and its application for Cu2+ removal from aqueous solutions

In the present study, dead pig pyrolysis carbonization material (PPCM) for the adsorptive removal of Cu²⁺ from aqueous solutions was investigated. PPCM was characterized using various techniques including scanning electron microscopy (SEM), X-ray energy dispersion spectrometry (XRD) and Fourier transform infrared spectrometry (FTIR). Influences of several experimental parameters, such as initial pH, temperature, and adsorption time for the removal of Cu²⁺ from aqueous solutions using PPCM were investigated. The Characterization analyses revealed the presences of large number of pores and PO₄^3- functional groups on the carbonization material''s surface. Results demonstrated that the optimal initial pH value for the removal Cu²⁺ was about 5.0, and high temperature favored Cu²⁺ removal from aqueous solutions. In addition, adsorption kinetics, isotherms and thermodynamics were applied to the adsorption data, and good correlation coefficients were obtained for the pseudo-second-order kinetics models. The Langmuir isotherm model fitted well with the experimental data of Cu²⁺ removal using PPCM. Findings from this study suggested that the application of dead PPCM can be useful for removal of Cu²⁺ from water environments and considered to be an environment-friendly process.