Study on Kinetic of Hg2+ from Wastewater Absorbed by Lemon Residues
SHEN Wang-qing1, 2, WANG Miao1, YANG Ting1
1. College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang 641100, China 2. Key Laboratory for Fruit Waste Treatment and Resource Recycling of Sichuan Provincial College, Neijiang 641100, China
Abstract:With low price and its superior adsorption performance after modification, currently agricultural waste is used as adsorbent of heavy metals in wastewater, which has become a hot research topic. To study on Hg2+ from wastewater absorbed by lemon residues that has been modified by 15% concentration of sulphuric acid. The pore volume, pore size and other properties of the adsorbent were test. The samples were characterized by differential thermal analysis, IR, electron microscopy and spectroscopy. The result showed that the adsorption rate was controlled by membrane diffusion kinetics that was viewed as the first order kinetics equation of the Lagergren, which was physically absorbed. The adsorption properties of modified lemon residues were improved greatly, and the pore size distribution mainly was medium. There were three losses-weight process. There was a endothermic peak around 66 ℃ and two exotherm near 316 ℃ and 494 ℃. Basic framework of Lemon residues was not changed and structure of Lemon residues was amorphous; the surface of modified lemon residues loosen and many pores formed, and Hg2+ have been adsorbed effectively.
沈王庆1,2,王 淼1,杨 婷1 . 柠檬渣吸附污水中Hg2+的动力学研究 [J]. 光谱学与光谱分析, 2016, 36(03): 788-794.
SHEN Wang-qing1, 2, WANG Miao1, YANG Ting1 . Study on Kinetic of Hg2+ from Wastewater Absorbed by Lemon Residues . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(03): 788-794.
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