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| 生物炭对水体中铵氮的吸附特征及其动力学研究 |
| Adsorption and Kinetics of Ammonium from Aqueous Medium onto Biochar |
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| DOI： |
| 中文关键词: 生物炭;铵氮;吸附机理; |
| 英文关键词: biochar;ammonium nitrogen;adsorption mechanism; |
| 基金项目:国家自然基金项目(40721002,40872212,41021062); 贵州省农业攻关计划项目(黔科合NY字[2011]3079号); 中国科学院院地合作项目资助和“碳专项”项目 |
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| 中文摘要: |
| 以生物炭作为吸附剂,通过静态实验研究了生物炭对水体中铵氮的吸附特性,并从动力学角度探讨了其吸附机理。结果表明,生物炭对铵氮的吸附在60min内基本达到吸附平衡,其吸附量随着水溶液中铵氮的增加而增加,Langmuir方程能够更好的描述铵氮在生物炭上的等温吸附行为,最大吸附量为1.24mg/g,铵氮在生物炭上的吸附动力学数据符合假二级方程,吸附过程受外部液膜扩散、表面吸附和颗粒内扩散过程的影响。 |
| 英文摘要: |
| The experiment was conducted on the adsorption characteristics of biochar for removing ammonium in aqueous medium.The adsorption equilibrium and kinetic behavior of ammonium onto biochar were investigated by a series of batch adsorption experiments,and adsorption mechanism was discussed from the kinetic point of view.Results indicated that ammonium adsorption equilibrium was reached in about 60 minutes,and the capacity of biochar adsorbing ammonium tended to increase with increasing concentrations of ammoni... |
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