期刊论文

中文

安全与环境学报

1009-6094

2017

17

5

1922-1926

10.13637/j.issn.1009-6094.2017.05.058

本校为第一机构

为探究沉积物对水体中硝态氮的吸附特性,以湘江衡阳段上游沉积物为研究对象,通过室内模拟吸附试验,探讨沉积物吸附硝态氮的影响因素、动力学规律及吸附等温线特征,并且利用SEM、FTIR等表征手段揭示吸附机理。结果表明,环境因素的改变会对硝态氮的吸附产生一定影响,泥水比的增大使沉积物的固体浓度效应明显,吸附量减小;硝态氮初始质量浓度越高,吸附量越大;温度越低越有利于沉积物对硝态氮的吸附;扰动速率偏高和偏低都会使吸附量减小。吸附过程在60 min后逐渐达到稳定,其吸附过程符合准二级动力学模型方程和Langmuir等温吸附方程,以化学吸附和单分子层吸附为主。 SEM表征分析表明,沉积物呈粗糙多孔...

This essay attempts to present its study results on the adsorption characteristics of sediments on the nitrate nitrogen in water,with the sediments in the upper reaches of the Hengyang section of Xiang River as a case study sample. In the paper,the essay has done the investigation and determination of the influential factors,the kinetic laws and the adsorption isotherm characteristics of the sediment absorption of the nitrate nitrogen through the room-in simulated adsorption experiments so as to disclose its adsorption mechanism by means of SEM and FTIR. The results of our investigation and si...