文章摘要
王林, 邹明, 刘晓东, 俞元春.土壤及生物炭对草甘膦的吸附作用[J].水土保持学报,2019,33(3):372~377
土壤及生物炭对草甘膦的吸附作用
Adsorption of Glyphosate by Soil and Biochar
投稿时间:2018-11-08  
DOI:10.13870/j.cnki.stbcxb.2019.03.054
中文关键词: 生物炭  草甘膦  吸附
英文关键词: biochar  glyphosate  adsorption
基金项目:国家自然科学基金项目(31670615,31270664);林业科技成果国家级推广项目([2016]39号);江苏高校优势学科建设工程项目(PAPD)
作者单位E-mail
王林, 邹明, 刘晓东, 俞元春 南京林业大学南方现代林业协同创新中心, 南京林业大学生物与环境学院 南京 210037 ycyu@njfu.edu.cn 
摘要点击次数: 211
全文下载次数: 104
中文摘要:
      为了确定生物炭修复草甘膦污染土壤的可行性,通过添加不同比例和种类的生物炭到土壤中,研究土壤对草甘膦的吸附效果。采用吸附动力学拟合、等温吸附分析、红外光谱测定分析方法。结果表明:草甘膦能强烈地吸附在红壤及稻壳炭、竹炭、竹柳炭中,相比于红壤,3种生物炭达到吸附平衡时间短。吸附动力学符合准二级动力学方程,等温吸附符合Freundlich吸附等温方程。Freundlich吸附等温方程中1/n数值均<1,表明红壤和3种生物炭对草甘膦的吸附方式是非线性吸附,且非线性程度大小为竹柳炭 > 竹炭 > 红壤 > 稻壳炭。生物炭添加到红壤中,可以提高红壤吸附草甘膦的量,生物炭添加比例越高,土壤吸附草甘膦的量也越高。土壤中添加生物炭比例相同时,竹炭使土壤吸附草甘膦的量最高,竹柳炭次之、稻壳炭最低。3种生物炭吸附草甘膦前后的红外光谱分析阐明了酚、胺、芳香烃、羧酸、羧酸盐、脂肪醚等在吸附过程中起重要作用。
英文摘要:
      In order to determine the feasibility of biochar to repair glyphosate-contaminated soil, the adsorption effect of soil on glyphosate was studied by adding different proportions and types of biochar to the soil. After adsorption kinetics fitting, isothermal adsorption analysis and infrared spectroscopy were used. The results showed that glyphosate was strongly adsorbed in soil, rice husk carbon, bamboo charcoal and bamboo fillet carbon. Compared with soil, the other three biochars had the shorter adsorption equilibrium time. Adsorption kinetics conformed to the quasi-second-order kinetic equation, and isothermal adsorption conformed to the Freundlich adsorption isotherm equation. In the Freundlich adsorption isotherm equation, all 1/n values were < 1, which showed that the adsorption of glyphosate by soil and three biochars was non-linear, and the degree of non-linearity was bamboo fillet carbon > bamboo charcoal > red soil > rice husk carbon. Adding biochar to red soil could increase the adsorption of glyphosate in red soil. The higher the ratio of biochar addition, the higher the amount of glyphosate adsorbed by the soil. When the proportions of biochar added in soil were the same, bamboo charcoal was added to red soil to make the highest amount of glyphosate adsorbed on soil, followed by bamboo charcoal, and rice husk charcoal. The infrared spectra before and after the adsorption of glyphosate by three biochars demonstrated that phenol, amine, aromatic hydrocarbon, carboxylic acid, carboxylate and adipoether played the important role in the adsorption process.
查看全文   查看/发表评论  下载PDF阅读器
关闭