两种生物质炭对水中镉离子吸附效果的研究

Study on the Adsorption Effect of Two Kinds of Biochar on the Cadmium Ions in Water

近年来水体中镉污染愈来愈严重,由秸秆制备的生物质炭表面疏松多孔且含有丰富的官能团,为治理污染提供了新方向。设置不同的单因素影响实验探寻生物质炭吸附水中镉情况并探究其机理是解决该问题的关键一步。同时还对不同温度制备的生物质炭对镉的吸附效果进行了探究,并将玉米与水稻生物炭进行对比,经实验发现玉米生物炭在500℃制备条件下对水中镉有最好的吸附效果,1h降解率可达92.3%。

In recent years,the cadmium pollution in water has become more and more serious,and the surface of biochar prepared from straw is loose and porous and contains rich functional groups,which provides a new direction for pollution control.The key step to solve this problem is to set up different single factor effect experiments to explore the adsorption of cadmium in water by the biochar and to investigate its mechanism.At the same time,the adsorption effect of biochar prepared at different temperatures on cadmium is also studied in this experiment,and a comparison is made between the corn and rice biochar.It is found that the corn biochar which is prepared at 500℃has the best adsorption effect on the cadmium in water,and the degradation rate of 1h can reach 92.3%.