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秸秆生物碳的结构特征及其对17β-雌二醇的吸附性能

李沛辰 毋 伟 张丰松 王代懿 何 洁

李沛辰, 毋 伟, 张丰松, 王代懿, 何 洁. 秸秆生物碳的结构特征及其对17β-雌二醇的吸附性能[J]. 环境科学研究, 2015, 28(8): 1260-1266.
引用本文: 李沛辰, 毋 伟, 张丰松, 王代懿, 何 洁. 秸秆生物碳的结构特征及其对17β-雌二醇的吸附性能[J]. 环境科学研究, 2015, 28(8): 1260-1266.
LI Peichen, WU Wei, ZHANG Fengsong, WANG Daiyi, HE Jie. Structural Characteristics of Straw Biochars and Sorption of 17β-Estradiol on Straw Biochar[J]. Research of Environmental Sciences, 2015, 28(8): 1260-1266.
Citation: LI Peichen, WU Wei, ZHANG Fengsong, WANG Daiyi, HE Jie. Structural Characteristics of Straw Biochars and Sorption of 17β-Estradiol on Straw Biochar[J]. Research of Environmental Sciences, 2015, 28(8): 1260-1266.

秸秆生物碳的结构特征及其对17β-雌二醇的吸附性能

基金项目: 国家自然科学基金项目(41201513);中央级公益性科研院所基本科研业务专项(2013-YSGQ-10)

Structural Characteristics of Straw Biochars and Sorption of 17β-Estradiol on Straw Biochar

  • 摘要: 以小麦和水稻秸秆为原料,采用限氧裂解法在400 ℃下制备秸秆生物碳,利用热重分析、元素分析、FTIR(红外光谱分析)和BET-N2比表面及孔径分布等手段表征生物碳的结构与组成,探讨其对天然类固醇雌激素E2(17β-雌二醇)的吸附特性. 结果表明:小麦和水稻秸秆在40~70、300~350 ℃有2个失重峰,分别为失水和纤维素热解所致;小麦秸秆生物碳中w(C)、w(H)、w(O)、w(N)分别为59.45%、2.81%、20.17%、1.20%,水稻秸秆生物碳中分别为51.14%、2.44%、17.02%、1.04%,2种秸秆生物碳均含有丰富的芳香性官能团及无机矿物组分;小麦和水稻秸秆生物碳比表面积分别为51.32和28.63 m2/g. E2在2种秸秆生物碳中的吸附动力学曲线均符合Elovich方程,吸附热力学曲线符合Freundlich方程,其中,非线性指数(n)分别为0.46和0.42,Freundlich系数Kf为2 526.15和4 368.23. 吸附过程可以被双模型方程很好地拟合,其中表面吸附的饱和吸附量(Q0)与20 nm以下的总孔体积呈良好正相关,分配作用则因原料不同而呈很大差异,影响因素尚需进一步研究.

     

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  • 刊出日期:  2015-08-25

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