三唑酮在湘南第四纪红壤上的吸附行为

采用振荡平衡法对三唑酮在湖南第四纪红壤中的吸附行为进行研究,并探讨了吸附时间、浓度、温度、pH等因素对吸附的影响。结果表明,三唑酮在红壤上的吸附分为快速吸附和慢速吸附2个过程。快速吸附基本在8h内完成,当吸附时间延长至24h时,吸附量提高了20%。三唑酮初始浓度越大、吸附时间越长,在红壤上的最大吸附容量也越大;随着温度升高或pH值增大,三唑酮的吸附量降低。

Adsorption Characteristics of Triadimefon on Quatemary Red Earth

Adsorption and desorption behaviors of a fungicide,triadimefon,in soil is an important factor governing bio-availability and persistency of the fungicide.In order to reveal adsorption behavior of triadimefon,in soil,the adsorption of triademefon in Quatemary red soil was conducted by batch sorption method,and influences of environmental factors were evaluated including consistency of solution,time,temperature and pH,respectively.The results indicated process of adsorption can be divided into fast-reacting course and slow-reacting course.The fast-reacting course was achieved in eight hours,but the amount of triadimefon adsorbed increased by 20% when adsorbing time was prolonged to 24 hours.In addition,as the initial chromium concentration is bigger and adsorbing time is longer.The maximum limitation of triadimefon on the red earth is more complex,but decreasing temperature and reducing pH value can raise adsorbing capacity.