【摘 要】
：
采用批量平衡震荡法研究了腐植酸对不同浓度阿特拉津的吸附量随时间变化的规律,并利用傅里叶红外光谱(FTIR)和电子顺磁共振波谱(ESR)2种方法探讨其吸附机理.结果表明,腐植酸
【机 构】
：
中国农业大学资源与环境学院,广东省生态环境与土壤研究所
论文部分内容阅读
采用批量平衡震荡法研究了腐植酸对不同浓度阿特拉津的吸附量随时间变化的规律,并利用傅里叶红外光谱(FTIR)和电子顺磁共振波谱(ESR)2种方法探讨其吸附机理.结果表明,腐植酸对阿特拉津的吸附量与吸附时间符合对数和双曲线函数关系,吸附初始阶段是一个快速过程,随着时间的增加,吸附速率逐渐减慢,最后趋于平衡.阿特拉津初始浓度分别为0.986mg/L、3.14mg/L、6.08 mg/L、11.4mg/L、12.7mg/L和20.6mg/L,最终吸附量分别为0.235 μg/kg、0.490μg/kg、1.32 μg/kg、2.41μg/kg、2.06μg/kg和3.36 μ g/kg.阿特拉津在腐植酸颗粒和吸附溶液中量的分布符合一定的线性函数关系,可用Freundlich方程描述.FTIR分析表明,腐植酸与阿特拉津之间存在氢键、范德华力、质子转移和电荷转移等弱作用力,ESR检测证实,腐植酸对阿特拉津的吸附过程中发生了电荷转移.
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