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为了解香蒲绒纤维对油的吸附性能与机理,通过静态实验,研究了吸附时间、温度、香蒲绒投加量、油浓度对狭叶香蒲绒吸附水溶液中0#柴油、菜籽油的影响。香蒲绒纤维对油的吸附大约15 min达到平衡;2种油类物质的吸附量随温度、香蒲绒投加量增加而降低,随0#柴油和菜籽油含量增加而增加。热力学分析表明,香蒲绒对油类物质的吸附过程自发而且放热;拟二级动力学模型比拟一级动力学模型对吸附动力学实验结果拟合度更高;相比Freundlich等模型,0#柴油和菜籽油的平衡吸附量与Langmuir吸附等温模型的拟合效果更好;25℃条件下,由Langmuir线性模型得到的0#柴油和菜籽油的最大吸附量Qm分别为32.15 g/g和34.60 g/g。香蒲绒纤维表面粗糙、凹凸不平,主要含有O—H、C=O、C—O等官能团,平均蜡质含量为19.86%。结果表明,香蒲绒纤维是处理含油废水廉价且效果良好的吸附剂,吸附机理以物理吸附为主。
In order to understand the adsorption properties and mechanism of the scent of the cashmere fiber to oil, the effects of adsorption time, temperature, dosage of cattail and oil concentration on 0 # diesel and rapeseed oil in the aqueous solution of S. angustifolia were studied by static experiments. The adsorption of oil by the sackcloth fibers reached equilibrium in about 15 minutes. The adsorption amount of the two oil species decreased with the increase of temperature and the amount of cattail raised, but increased with the increase of 0 # diesel and rapeseed oil content. The thermodynamic analysis showed that the adsorption of oil by cattail was spontaneous and exothermic. Compared with the first-order kinetic model, the fit of the second-order kinetic model to the experimental results of adsorption kinetics was higher. Compared with the Freundlich model, The equilibrium adsorption capacity of diesel oil and rapeseed oil was better than that of Langmuir adsorption isotherm model. The maximum adsorption capacity of 0 # diesel and rapeseed oil obtained from Langmuir model at 25 ℃ was 32.15 g / g And 34.60 g / g. The cashmere fiber surface is rough and uneven, mainly containing O-H, C = O, C-O and other functional groups, the average wax content of 19.86%. The results showed that the sackcloth fiber was a cheap and effective adsorbent for the treatment of oily wastewater. The adsorption mechanism was mainly physical adsorption.