小叶榕落叶改性条件优化及其处理含Cu~(2+)废水动力学研究

以废弃的小叶榕落叶作为吸附剂,通过正交试验选择制备改性小叶榕落叶的最佳条件,结果表明:当硝酸浓度为10moL/L,干燥温度为120℃和氢氧化钠浓度为1moL/L时,改性后的小叶榕落叶的活性最强,对废水中Cu2+的吸附率最高。利用改性后的小叶榕落叶进行了吸附去除水中Cu2+的研究,得出当pH为5.7,铜的最大吸附容量Qmax=0.59mg(Cu)/g(改性落叶)。并通过非线性回归,构建了影响因素同吸附率之间的数学模型和落叶吸附的动力学模型。

Optimization Conditions for Modifying Ficus Microcarpa Defoliation and Kinetics of Treatment of Wastewater Containing Cu2+ Using the Defoliation

Using the scrap ficus microcarpa defoliation as absorbent,orthogonal experiments were conduct to determine the optimal conditions for preparation of modified ficus microcarpa defoliation.The results showed that at the conditions of nitric acid concentration of 10moL/L,drying temperature of 120℃ and sodium hydroxide concentration of 1moL/L,the activity of modified ficus microcarpa defoliation reached the maximum with corresponding highest adsorption rate to Cu2＋ in the wastewater.The study using modified ficus microcarpa defoliation to absorb Cu2＋ in the wastewater was conducted.It concluded that at pH5.7 the specific absorption rate to cupper was Qmax=0.59mg Cu/g modified defoliation.By nonlinear regression,the relationship between adsorption rate and its affecting factors was described by following models and an adsorptive kinetic model were developed as follows.