改性甘蔗渣吸附废水中低浓度Cu2+的研究

利用离子液氯化-1-己基-3-甲基咪唑对甘蔗渣进行改性,利用改性甘蔗渣吸附去除模拟废水中低浓度的Cu2+,并对比了较优条件下甘蔗渣改性前后的Cu2+吸附性能.结果表明,溶液pH、改性甘蔗渣投加量、吸附时间对改性甘蔗渣吸附Cu2+均有一定的影响,较佳的溶液pH为5.41、改性甘蔗渣投加量为0.30 g、吸附时间为130 min;吸附温度升高Cu2+吸附率反而降低,因此选择在室温下进行吸附反应为宜;在以上较优条件下,改性甘蔗渣和甘蔗渣的Cu2+吸附率分别为83.20％和53.83％,前者的Cu2+吸附率提高了30.35％.

Study on the adsorption of low concentration Cu2+ in wastewater by modified bagasse

The bagasse was modified in ionic liquid 1-hexyl-3-methylimidazolium chloride(C10H19ClN2),and the obtained modified bagasse was applied as adsorbent for removal of low concentration Cu2+ in simulated wastewater.The effect of pH,modified bagasse dosage,adsorption time on Cu2+ removal efficiency was investigated and the adsorption performance of modified bagasse was compared with that of non-modified bagasse.Results showed that the optimal treatment conditions were pH 5.41,modified bagasse 0.30 g and adsorption time of 130 min.The Cu2+ removal efficiency was increased with increasing the adsorption temperature,so the adsorption should be operated at the room temperature.Under these optimal adsorption conditions,the Cu2+ removal rate of modified bagasse and non-modified bagasse was 83.20% and 63.83% respectively,means bagasse modification increased Cu2+ removal rate by 30.35%.