氧化石墨烯对水中重金属离子吸附影响的研究

Study on Adsorption Effects of Heavy Metal Ions in Water by Graphene Oxide

通过氧化石墨烯（GO）对重金属离子Pb2＋、Cd2＋和Cr3＋的吸附实验,考察了离子浓度、溶液p H值、GO用量、吸附时间对GO吸附重金属离子的影响。结果表明增加离子浓度有利于重金属离子吸附量的提高,当离子浓度达到1000 mg/L时,吸附量增加的趋势变缓。吸附时间在20 min以上,重金属离子吸附量变化不大。GO用量增加反而降低单位质量GO的吸附量。重金属离子吸附量在p H值为5.5-6.5范围内最佳。

Based on the adsorption test of heavy metal ions（ Pb2＋,Cd2＋and Cr3＋） by graphene oxide（ GO）,the effect of ionic concentration,p H value,the amount of GO and adsorption time on adsorption amount of heavy metal ions with GO was investigated. The results showed that adsorption amount was promoted by increasing ionic concentration.After the ionic concentration reached 1000 mg / L,the adsorption amount showed a slight increase. Moreover,the adsorption amount of heavy metal ions changed a little when adsorption time exceeded 20 min. However,the adsorption amount based on unit mass of GO decreased by increasing the amount of GO. When p H value was 5. 5 - 6. 5,the adsorption of heavy metal ions by GO reached optimum effect.