生态环境学报Issue(3)：505-510,6.DOI:10.16258/j.cnki.1674-5906.2015.03.021
不同温度下松木生物质炭对阿特拉津的吸附性能研究
Adsorption Properties of Pinus Derived Biochar for Atrazine at Different Temperature
摘要
Abstract
Biochar is a bioresidue generated from heating biomass under oxygen limited conditions, resulting in a porous material which nowadays is widely used for the removal of pollutants from soil and water. Therefore, the purpose of this study was to investigate the effects of temperature on the adsorption of atrazine onto biochar, and evaluate the mathematic kinetic model underlying the adsorption of atrazine. The Biochar was produced by pyrolyse process (450℃, for 2 h) using pine wood waste materials-Pine Wood derived Biochar (PWB). The PWB sample was grounded to pass through a <0.6 mm sieve. The characterization of the external surface morphology of PWB was performed by a field emission scanning electron microscope (SEM) and the functional groups present in each biochar sample before and after the absorption experiments were determined using Fourier transform infrared (FTIR) spectroscopy. Each batch experiment was performed in duplicates. The effect of temperature on the adsorption of atrazine onto biochar was determined by controlling the change in the pesticide concentration with time by using a high performance liquid chromatography (HPLC). Several kinetic models were tested to fit the data. The SEM showed that the surface of PWB appeared to be smooth with shallow holes. The pores shapes look circular and well distributed on the whole surface of the biochar. The FTIR analysis after adsorption revealed the appearance of different numbers of peaks with different intensities (low and high intensities) suggesting combinations of chemical functional groups on biochar with atrazine herbicide. The change in band intensity at 1775 cm-1 was most prominent after PWB was exposed to atrazine. The adsorption capacity increased with increasing temperature (0.4942, 0.7301, 1.0986 mg·g-1 for temperatures of 10, 18 and 27℃, respectively), suggesting an endothermic process. Chemical adsorption mechanism was also found to play a dominant role in the adsorption of atrazine to biochar. Therefore, PWB may have a great potential in removing atrazine from the environment at different climatic conditions.关键词
生物质炭/阿特拉津/批试验/温度Key words
Biochar/atrazine/batch experiment/temperature分类
资源环境引用本文复制引用
ALBERTO BENTO CHARRUA,WANG Hang,LÜ Chunxin,SHEN Yong,LIU Na..不同温度下松木生物质炭对阿特拉津的吸附性能研究[J].生态环境学报,2015,(3):505-510,6.基金项目
吉林省科技厅应用基础研究项目（120102JC01024925）；吉林大学青年师生学科交叉培育项目 （）
