摘要
以海南废椰壳为原料,采用磷酸活化法制备活性炭载体,用负载氧化铜的活性炭载体处理酸性大红GR染料废水。通过单因素和响应面实验方法得到了椰壳活性炭的最佳制备工艺条件:液固比3.1 mL·g^(-1),磷酸质量分数66%,活化时间2.6 h,活化温度594℃,此条件下制备的活性炭孔隙丰富发达,分布均匀,比表面积大(1 658m^2·g^(-1)),负载氧化铜后可使废水中COD_(Cr)和色度的残余浓度分别降至23.4 mg·L^(-1)和8稀释倍数。运用Designexpert 8.0软件程序建立的分别以COD_(Cr)和色度残余率为目标值的工艺模型,显著可靠,其理论计算值与实验结果吻合较好,可预测不同条件下处理废水的效果。模型方差分析显示上述4个工艺参数对目标值的影响程度均为"显著",说明工艺操作时严格控制好它们可制备出高质量的活性炭。
The activated carbon carrier was prepared by Hainan waste coconut shell using phosphoric acid activation method,and used for treating acid scarlet GR dye wastewater after loaded by copper oxide.Through single factor and response surface methodology, the optimum preparation conditions of the coconut shell activated carbon were obtained: liquid-solid ratio of 3.1 mL·g-1,phosphoric acid mass fraction of 66 %,activation time of 2.6 h and activation temperature of 594 ℃.Under the optimized conditions,the prepared activated carbon had rich and developed pores,uniform distribution, large specific surface area ( 1 658 m2·g-1 ) ,and the residual concentrations of CODCr and chroma in waste water could be reduced to 23.4 mg·L-1 and 8 dilution times.The process models with CODCr and chroma residual rate as target values established by using the Design-expert 8.0 software program was obviously reliable,and the theoretical calculated values were in good agreement with the experimental results,which can predict the effect of wastewater treatment under different conditions.Analysis of variance of the models showed that the degrees of influence of the above four process parameters on the target value were“significant”,which means that high quality activated carbon can be prepared by strictly controlling them during the process operation.
作者
龚媛媛
龚继文
蒋柏泉
GONG Yuanyuan;GONG Jiwen;JIANG Boquan(Institute of Energy Research, Jiangxi Academy of Sciences,Nanchang University,Nanchang 330000,China;School of Resouses,Environmental and Chemical Engineering,Nanchang University,Nanchang 330031,China)
出处
《南昌大学学报（工科版）》
CAS
2018年第4期312-317,共6页
Journal of Nanchang University(Engineering & Technology)
基金
国家自然科学基金资助项目(20807020)
关键词
椰壳
活性炭
酸性大红GR染料
染料废水
工艺优化
工艺模型
coconut shell
activated carbon
acid scarlet GR dye
dye wastewater
process optimization
processmodel
