改性玉米秸秆吸附处理含Cu废水
Treatment of Wastewater Containing Copper with Modified Corn Stalk
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摘要: 以玉米秸秆为原料,采用微波加热-氯化锌活化法进行改性,探讨了吸附剂投加量、pH值、温度等因素对废水中Cu去除率的影响.结果表明,吸附剂对模拟废水中Cu的最高去除率可达90，以上;当pH值在5.0～6.0间、温度为30～35℃、吸附剂投加量为20 g/L,吸附时间为60 min时达最佳去除效果;等温吸附曲线可用Langmuir、Temkin和Freundlich模型拟合,前二者拟合较好.
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关键词:
- 玉米秸秆,改性,铜,吸附
Abstract: Adsorption of Cu from wastewater onto modified corn stalk impregnated with zinc chloride by microwave heating was investigated. The adsorption was studied by considering the effects of various pa-rameters on the removal rate of Cu, such as pH, the dosage of absorbent and temperature. The results showed that the modified absorbent used in this study was efficient , with a removal ratio of Cu up to 90%or more. Optimum results of Cu removal were obtained with a pH of 5.0～6.0, at 30～35℃and with an adsorbent dosage of 20 g/L and an adsorption time of 60 min. The Langmuir, Temkin and Freundlich equa-tions can describe the absorption characteristics of Cu, the Langmuir and Temkin equations being better. -
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