吸附
热重分析
气凝胶
吸附剂
朗缪尔吸附模型
材料科学
化学工程
吸附
傅里叶变换红外光谱
环境污染
核化学
铀
化学
纳米技术
有机化学
冶金
环境保护
工程类
环境科学
作者
Xudong Wu,Shaobin Wang,Li Zhou,Chengkun Cai,Mingfang Hu,Xiao-Fang Yu,Rong He,Tao Chen
标识
DOI:10.1016/j.jclepro.2023.137320
摘要
Uranium-containing wastewater has sparked worries about environmental sustainability on a worldwide scale, which has increased the demand for efficient adsorbent materials for contamination cleanup. A composite gel-freeze-drying technique was utilized to create the hydroxyapatite/Nicandra physaloides (L.) Gaertn seeds gum aerogel (NPG-HAP) adsorbent materials, combining the large contact area of three-dimensional materials with the effective adsorption features of nano sorbent materials. The structure and morphologies of NPG-HAP aerogels have used a range of techniques, including scanning electron microscopy (SEM), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and others. The average pore sizes of NPG-HAP were 15.87 nm before uranium adsorption and 12.18 nm afterward, concerning specific surface areas of 31.91 m2/g and 4.04 m2/g, respectively. The Langmuir isotherm determined that NPG-HAP aerogel could theoretically adsorb uranium at a maximum rate of 828.75 mg/g. The sorption capacity of NPG-HAP was spontaneous and adhered to a quasi-secondary kinetic model, according to thermodynamic and kinetic measurements. The findings demonstrated that the synthetic NPG-HAP aerogel can be employed as a successful and promising adsorbent for the removal of dyes from wastewater uranium.
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