通过静置吸附试验,研究了胡萝卜渣对铜离子吸附效果的影响因素及有关吸附机理。结果显示:吸附率随胡萝卜渣粒径的减小而增大,100目时胡萝卜渣对铜离子的吸附率可达76.35%;铜离子溶液初始浓度相同时,吸附率随胡萝卜渣加入量的增加而增大,而胡萝卜渣加入量相同时,对不同浓度的铜离子溶液吸附率均出现一次最小值;在铜离子的初始浓度为10mg/L和胡萝卜渣用量为0.5g时,对pH值、温度和浸泡时间3种因素,在6水平上进行了正交试验,最佳吸附条件为废水的pH值为2、温度为40℃、浸泡的时间为3h;20℃和40℃时铜离子的吸附等温线结果表明,胡萝卜渣对铜离子的吸附以单分子层吸附占优势,吸附等温线较好地符合Freundlich吸附等温式;铜离子的吸附动力曲线结果表明,胡萝卜渣对铜离子的吸附动力学行为比较符合二级动力学模型。

In order to provide a cheap and effective heavy metal ion adsorbent,carrot slag has been used to adsorb copper ions in aqueous solution.Results show that copper ion adsorption rate increases when using a smaller size of carrot slag.The adsorption rate for carrot slag can reach 76.35%at-100 mesh.Different quality carrot slag on different initial concentration copper ions adsorption experiments show that:under the same copper ions initial concentration, addition of more carrot slag results in a higher copper ion adsorption rate.At a constant carrot slag amount different concentrations of copper ions adsorption rate all appear a minimum value.When copper ions initial concentration is 10.0mg/L and the amount of carrot slag is 0.5g,3 factors 6 level orthogonal tests shows that;the optimum adsorption conditions for the wastewater pH is 2,the temperature is 40℃and soaking time is 3 hour.20℃and 40℃copper ion adsorption isotherm results show that:carrot slag on copper ions adsorption with single molecule layer absorption dominant,and adsorption isotherm is fit to Langmuir adsorption isotherm.The copper ions Dynamic adsorption curve results show that;second kinetic model can describe the adsorption kinetics of carrot slag.