摘要
研究了对硝基苯酚在不同沉积物上的吸附等温线 ,比较分析了Linear方程、Freundlich方程和Langmuir方程描述吸附等温线的准确性和稳定性 .结果表明 ,Linear方程更适合描述沉积物吸附对硝基苯酚的等温线 .对硝基苯酚在沉积物上的吸附主要是溶质在沉积物有机质中的分配 ,其吸附热为 - 7 8kJ·mol-1,主要的吸附作用力为疏水键力 .对硝基苯酚在 18个沉积物有机质上吸附自由能改变量为 - 5 4— - 7 2kJ·mol-1.
The isotherm data of p nitrophenol to 18 sediments were studied. An evaluation of Linear, Freundlich and Langmuir equations on both accuratity and stability indicates that the Linear equation is the best. Sorption of p nitrophenol to sediment is dominated by the partition of solutes to sedimental organic matter. The influences of temperature on sorption of p nitrophenol to sediment was also investigated. The sorption parameters of thermodynamics, Δ H =-7 8?kJ·mol -1 , suggest that the sorption behavior is dominated by dispersive force. The free energy changes of p nitrophenol sorption to 18 sedimental organic matter is in the range of -5 3—7 2?kJ·mol -1 . The sorption happened in sediment organic matter because of the decrease of free energy.
出处
《环境科学学报》
CAS
CSCD
北大核心
2001年第6期674-678,共5页
Acta Scientiae Circumstantiae
基金
浙江省自然科学基金青年科技人才培养专项资金资助项目 (编号 :RC990 32 )
