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文章摘要
引用本文:
不同粒径农膜及老化方式对Cd的吸附特性研究
Study on Adsorption Characteristics of Cadmium with Different Diameter Agricultural Films and Aging Methods
投稿时间:2020-03-12  修订日期:2020-04-10
DOI:
中文关键词: 农膜  不同粒径  老化    吸附
英文关键词: agricultural film  different particle sizes  aging  cadmium  adsorption
基金项目:海南省自然科学基金支撑计划课题(319MS008)、国家自然科学基金面上项目(41571288)
作者单位E-mail
薛日昕 海南大学 生态与环境学院/海南省农林环境过程与生态调控重点实验室 2032828842@qq.com 
张海祥 海南大学 热带作物学院  
李廷杭 海南大学 生态与环境学院/海南省农林环境过程与生态调控重点实验室  
李昌恒 海南大学 生态与环境学院/海南省农林环境过程与生态调控重点实验室  
刘 银 海南大学 生态与环境学院/海南省农林环境过程与生态调控重点实验室  
王青青 海南大学 生态与环境学院/海南省农林环境过程与生态调控重点实验室  
郭根茂 海南大学 生态与环境学院/海南省农林环境过程与生态调控重点实验室  
黄 青 海南大学 生态与环境学院/海南省农林环境过程与生态调控重点实验室 qh425806@163.com 
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中文摘要:
      农膜广泛应用使农膜残留污染问题已不容忽视,农膜颗粒对土壤环境中污染物迁移转化过程的影响鲜有研究。本研究从三种粒径(4目、10目、30目)农膜颗粒入手,研究农膜浓度、初始pH、吸附时间、Cd初始浓度及老化方式等因素对Cd吸附的影响,并利用扫描电镜( SEM )、傅里叶变换红外光谱( FTIR )和吸附模型拟合等来探讨三种粒径农膜及对Cd的吸附特性。结果表明:农膜颗粒对Cd的吸附能力与粒径大小成反比;准二级动力学模型及Langmuir等温吸附模型能较好拟合其对Cd的吸附过程;硝酸老化使农膜颗粒的吸附量减少50.10%,而过氧化氢老化对吸附量有积极作用,增加21.36%。本研究结果为探讨农膜颗粒对土壤重金属Cd的迁移转化过程、机制及残留农膜的污染防控提供参考和借鉴。
英文摘要:
      The wide application of agricultural film makes the problem of residual pollution of agricultural film impossible to be ignored, in addition, the impact of agricultural film particles on the migration and transformation of pollutants in the soil environment is rarely studied. In this study, starting with three types of agricultural film particles (4 mesh, 10 mesh, 30 mesh), the effects of agricultural film concentration, initial pH, adsorption time, initial Cd concentration and aging methods on Cd adsorption were studied, and Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and adsorption model fitting were used to explore the adsorption characteristics of Cd by three types of agricultural film and aging methods. The results show that the adsorption capacity of agricultural film particles for Cd is inversely proportional to the particle size; pseudo-second-order kinetic model and Langmuir isotherm adsorption model can better fit its adsorption process of Cd; compared with the control, nitric acid aging reduces the adsorption of agricultural film particles 50.10%, and the aging of hydrogen peroxide has a positive effect on the adsorption of agricultural film particles, an increase of 21.36%. The results of this study can provide a reference and reference for discussing the migration process and mechanism of heavy metal Cd in soil by agricultural film particles and the pollution prevention and control of residual agricultural film.
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