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化工新型材料  2018, Vol. 46 Issue (8): 211-216    
  科学研究 本期目录 | 过刊浏览 | 高级检索 |
新型重金属絮凝剂二硫代羧基化羟甲基聚丙烯酰胺制备条件的优化
何宝菊, 王刚*, 徐敏, 常青
兰州交通大学环境与市政工程学院,兰州730070
Optimization of preparation condition of novel heavy metal flocculant dithiocarboxyl hydroxymethy-polyacrylamide
He Baoju, Wang Gang, Xu Min, Chang Qing
School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070
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摘要 以聚丙烯酰胺、甲醛(HCHO)、二硫化碳(CS2)、氢氧化钠(NaOH)为原料制备新型重金属絮凝剂二硫代羧基化羟甲基聚丙烯酰胺(DTMPAM)。采用含Cu(Ⅱ)水样为考察对象,利用Plackett-Burman实验筛选出DTMPAM制备条件中的主要影响因素,再依据最陡爬坡实验确定出各主要影响因素的水平值,并以响应面法中的中心复合设计(CCD)模型对DTMPAM的制备条件进行优化。结果表明,CCD法建立的二次多项式模型回归性显著,且失拟项不显著,复相关系数R2为0.9275,模型拟合性良好。DTMPAM最优制备条件为:羟甲基聚丙烯酰胺(MPAM)质量分数0.5%。反应物MPAM、CS2、NaOH物质的量比1∶1.43∶1.43,预反应温度25℃、预反应时间60min、主反应温度45℃、主反应时间70min。在此条件下制备的DTMPAM对Cu(Ⅱ)的实际去除率为98.63%,与模型理论预测值98.86%接近,模型合理可靠。
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何宝菊
王刚
徐敏
常青
关键词:  絮凝剂  重金属  Plackett-Burman实验  最陡爬坡实验  响应面法    
Abstract: A novel heavy metal flocculant dithiocarboxyl hydroxymethy-polyacrylamide (DTMPAM) was synthesized with polyacrylamide,formaldehyde,carbon disulfide and sodium hydroxide.Taking removal rate of Cu(Ⅱ) in water samples as the main indicator,the main influencing factors in the preparation of DTMPAM was confirmed by Plackett-Burman experiment,and then the steepest ascent experiment was employed to approaching the level values of main influencing factors.Finally,the preparation conditions of DTMPAM were optimized through central composite design (CCD) of response surface methodology (RSM).The results showed that the regression of quadratic polynomial model established with CCD was significant while the lack of fit was not significant.The multiple correlation coefficient (R2) was 0.9275,which demonstrated the model had good fitness.The optimum conditions for the preparation of DTMPAM were as follows:the mass fraction of MPAM was 0.5%,the molar ratio of MPAM,CS2 and NaOH was 1∶1.43∶1.43,pre-reaction temperature was 25℃,pre-reaction time was 60min,main-reaction temperature was 45℃,and main-reaction time was 70min.Under the optimum conditions,the removal rate of Cu (Ⅱ) could reach 98.63%,which was close to the predicted value 98.86% of model.The result proved that the model established by RSM was reasonable and feasible.
Key words:  flocculant    heavy metal    Plackett-Burman experiment    steepest ascent experiment    response surface methodology
收稿日期:  2017-04-24                     发布日期:  2018-09-18      期的出版日期:  2018-08-20
基金资助: 国家自然科学基金项目(51368030)
通讯作者:  王刚(1981-),男,副教授,主要从事污染控制化学研究。   
作者简介:  何宝菊(1990-),女,在读硕士研究生,研究方向为污染控制化学。
引用本文:    
何宝菊, 王刚, 徐敏, 常青. 新型重金属絮凝剂二硫代羧基化羟甲基聚丙烯酰胺制备条件的优化[J]. 化工新型材料, 2018, 46(8): 211-216.
He Baoju, Wang Gang, Xu Min, Chang Qing. Optimization of preparation condition of novel heavy metal flocculant dithiocarboxyl hydroxymethy-polyacrylamide. New Chemical Materials, 2018, 46(8): 211-216.
链接本文:  
http://www.hgxx.org/CN/  或          http://www.hgxx.org/CN/Y2018/V46/I8/211
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