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采用批平衡法,研究了环丙氨嗪在江西鹰潭红壤、江苏南京黄棕壤、江苏常熟水稻土、河南封丘潮土和黑龙江海伦黑土5种土壤中的吸附特征.结果表明,环丙氨嗪在5种供试土壤中的吸附过程趋于线性吸附,且均能以Freundlich模型和Langmuir模型较好地进行线性拟合.其中,环丙氨嗪的土壤吸附lgKf值分别为:潮土1.650 5、黄棕壤1.671 5、红壤1.715 3、水稻土2.457 9和黑土2.655 7,表明环丙氨嗪在5种土壤中的吸附行为存在较大差异.Kf与土壤有机质含量呈正相关(r=0.989),与土壤pH之间呈显著负相关(r=-0.938).其吸附自由能变化为-20.8~-23.0 kJ/mol,表明环丙氨嗪在土壤中的吸附主要是物理吸附.
The batch equilibrium method was used to study the adsorption characteristics of cyromazine in five soils of Yingtan red soil in Jiangxi Province, Nanjing yellow brown soil in Jiangsu Province, Changshu paddy soil in Jiangsu Province, Fengqiu soil in Henan province and Helen black soil in Heilongjiang province.The results showed that cyclopropane ammonia The adsorption of triazine in the five soils tended to be linearly adsorbed, and both of them were well fitted by the Freundlich model and the Langmuir model. Among them, the values of soil adsorption lgKf for cyromazine were 1.600 5, yellow-brown soil 1.671 5, red soil 1.715 3, paddy soil 2.457 9 and black soil 2.655 7, indicating that there is a big difference in the adsorption behavior of cyromazine between the five soils.Kf is positively correlated with soil organic matter content (r = 0.989 ) Was negatively correlated with soil pH (r = -0.938), and the free energy of adsorption varied from -20.8 to -23.0 kJ / mol, indicating that the adsorption of cyromazine in soil was mainly physical adsorption.