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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (32): 159-164.doi: 10.11924/j.issn.1000-6850.2014-0521

所属专题： 智慧农业

• 工程 机械 水利 装备 • 上一篇    下一篇

基于Origin 7.0软件非线性拟合白浆土胡敏酸 吸附Zn2+的热力学过程

马壮,邸文静,王帅,尹丽华,郭戎方   

  1. 吉林省水利水电勘测设计研究院,吉林市丰满区农业蔬菜技术推广中心,吉林农业科技学院,吉林市丰满区农业蔬菜技术推广中心,吉林市丰满区农业蔬菜技术推广中心
  • 收稿日期:2014-03-02 修回日期:2014-03-02 接受日期:2014-04-28 出版日期:2014-11-20 发布日期:2014-11-20
  • 通讯作者: 王帅
  • 基金资助:
    国家科技支撑计划项目“东北平原中部（吉林）玉米水稻丰产节水节肥技术集成研究与示范”(2013BAD07B02)。

Thermodynamic Process of Zn2+ Adsorbed on Humic Acid Extracted from Albic Soil Fitted by the Non-linear Curve from the Origin 7.0 Software

  • Received:2014-03-02 Revised:2014-03-02 Accepted:2014-04-28 Online:2014-11-20 Published:2014-11-20

摘要： 基于Origin 7.0软件，非线性拟合热力学吸附过程不仅能够简单、准确得出热力学参数，且能将拟合效果直观表达出来。采用白浆土胡敏酸作为吸附剂，对Zn2+ 进行了热力学吸附过程的研究，并结合Origin 7.0软件对吸附规律进行了2种方式的拟合描述。结果表明：3个温度(293、303、313 K)条件下，热力学等温线存在共性，较低Zn2+ 平衡浓度范围内，吸附曲线近似直线上升，而随浓度继续升高，吸附曲线上升程度减缓，随后渐趋平衡。相比较而言，随温度升高，胡敏酸对Zn2+ 的吸附量逐渐增加，提升效果尤以高初始浓度条件下为最佳。运用Origin软件对热力学曲线进行拟合，可见Langmuir在描述两者间吸附规律的效果为最佳。同条件下，Origin自定义参数拟合的效果要优于软件自带方程。

关键词: 寒害, 寒害

Abstract: The non-linear fitting of thermodynamic adsorption process based on the Origin 7.0 software was not only simple and accurate, but also visually expressive. The humic acid (HA) extracted from albic soil as a sorbent was adopted to carry out the thermodynamic study of adsorbingZn2+ . Combined with Origin 7.0 software, the adsorption process was described in 2 ways. The results showed that: there were several similarities existed in 3 thermodynamic curves under the conditions of three temperatures (293, 303 and 313 K). At the low range ofZn2+ initial concentration, the adsorption curve increased approximately like a straight line, and withZn2+ concentration increasing, the rising level of adsorption curve became slowly, and then gradually the adsorbed capacity reached at equilibrium. In comparison, the adsorption ofZn2+ into HA increased gradually with increasing temperature, especially at the high initial concentration ofZn2+. The best description about adsorption process between HA andZn2+ was found in the Langmuir equation. Under the same condition, the fitting effect of self-defined parameters in the Origin software was better than the inherent equation existed in Origin itself.