华北潮褐土土壤中大肠杆菌的吸附动力学特征OA
Adsorption kinetics of Escherichia coli in cinnamon soil of North China
文章以环境生物污染指示菌——大肠杆菌为研究对象,基于 4种吸附动力学模型,研究了不同因素(生物炭、离子强度和土著微生物)下华北地区典型潮褐土对大肠杆菌的吸附动力学特征.结果表明:土壤对大肠杆菌的吸附动力学过程可以细化为快速吸附(0～20 min)、慢速吸附(20～60 min)和平衡吸附(80～120 min)3个阶段;准二级动力学方程能够较为准确地描述土壤对大肠杆菌的吸附动力学特征;土壤对大肠杆菌的吸附为非均相化学吸附,吸附速率的调控主要源于表面吸附和颗粒内扩散机制的协同作用;添加生物炭和提高离子强度会增加土壤对大肠杆菌的吸附量,而土著微生物的存在会降低土壤对大肠杆菌的吸附量.研究结果可为探索华北潮褐土土壤病原细菌控制途径提供理论基础.
As an indicator bacterium of environmental biological contamination,Escherichia coli(E.coli)was used as the research object,and the adsorption kinetics of Escherichia coli in typical agricultural soil of North China under different factors(biochar,ionic strength,indigenous microorganisms)were studied based on four ad-sorption kinetic models.The results showed that the process of adsorption kinetics of E.coli in soil can be refined to three following stages:fast adsorption(0-20 min),slow adsorption(20-60 min)and equilibrium adsorption(80-120 min).The quasi-secondary kinetic equation was suitable for describing the adsorption kinetics of E.coli.The adsorption of E.coli by soil was heterogeneous chemisorption,and the adsorption rate of E.coli was mainly fluc-tuated by the synergistic effect of surface adsorption and intragranular diffusion mechanism.The addition of biochar and the improvement of ionic strength increased the adsorption capacity of E.coli,while the presence of indigenous microorganisms decreased the adsorption capacity of E.coli in soil.These results can provide the theo-retical basis of controlling pathway for pathogenic bacterial contamination in cinnamon soil of North China.
李靖雯;胡慧;张雅丽;赵福玲;郭晓明
河南理工大学资源环境学院,河南 焦作 454000河南理工大学资源环境学院,河南 焦作 454000河南理工大学资源环境学院,河南 焦作 454000焦作市城乡一体化示范区环境监察大队,河南 焦作 454000河南理工大学资源环境学院,河南 焦作 454000
天文与地球科学
大肠杆菌吸附动力学潮褐土农业活动
Escherichia coliadsorption kineticscinnamon soilagricultural activity
《华东地质》 2026 (2)
238-246,9
国家自然科学基金"畜禽粪便还田区病原细菌在地下介质界面的迁移过程及其驱动机制(编号:42177070)"项目资助.
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