改性玉米芯对含铜废水的吸附特性

摘要

Using corncobs as adsorbent to treat copper-containing wastewater, the results of the test showed that, the best method for corncobs modification was KOH method. Taking 50 mL copper-containing wastewater with Cu2+ concentration of 10 mg/L as the research object, the best adsorption performance of corncobs for Cu2+ was achieved under the following conditions: the temperature was 298 K, the pH value was 7, the dosage of modified corncobs sieved by 60 mesh was 0.4 g, and the adsorption time was 60 min. Under the above condition, the removal rate of Cu2+ by modified corncobs reached 99.62%. It could be seen that, Freundlich equation was more suitable for describing the adsorption of Cu2+ by KOH modified corncobs.%以生物材料玉米芯作为吸附剂对含铜废水的处理进行了研究.结果表明,玉米芯的最佳改性方法为KOH改性法.在50 mL Cu2+质量浓度为10 mg/L的水样中,改性玉米芯对Cu2+的最佳吸附条件为:298 K下投加过60目筛的改性玉米芯0.4 g,pH值为7,吸附时间为60 min,吸附率可高达99.62％.KOH改性玉米芯对Cu2+的吸附以Freundlich方程的拟合效果更佳.