Abstract: The preparation conditions of biochar is described briefly. The main modification methods of biochar,in-cluding chemical modification,adding modifying agent method and changing environmental conditions,are discussed. The main advantages of the above modification methods are analyzed. Besides,the adsorption effect of the modified biochar on heavy metals in wastewater are summarized. The experimental results show that the modified biochar has pretty good adsorption effect on the heavy metals in wastewater. The maximum removing rates of heavy metals could reach 99.81%. Furthermore,the adsorption mechanisms,influencing factors and adsorption isothermal equation of modified biochar are also discussed. The future direction needs to be studied on the biochar adsorption for the heavy metals in wastewater,and the application prospect of modified biochar are brought forward.

Key words: modified biochar, heavy metals, wastewater treatment

摘要： 简述了生物炭的制备条件，讨论了生物炭的主要改性方法（化学法、添加改性剂法及改变外界条件），分析了各改性方法的主要优点，总结了改性生物炭对废水中重金属的吸附效果。实验结果表明，改性生物炭对废水中重金属吸附效果较好，重金属的最大去除率可达99.81%。另外，探讨了改性生物炭的吸附机理、影响因素和吸附等温式，并提出了未来生物炭吸附废水中重金属需要研究的方向以及改性生物炭的应用前景。

关键词: 改性生物炭, 重金属, 废水处理

CLC Number: 

• TQ424