化工进展 ›› 2019, Vol. 38 ›› Issue (04): 1953-1960.DOI: 10.16085/j.issn.1000-6613.2018-1435

• 精细化工 • 上一篇    下一篇

高岭土负载HPCS-MA对亚甲基蓝废水的絮凝性能

郭睿,张瑶(),高弯弯,韩双,王宁   

  1. 陕西科技大学,陕西省轻化工助剂重点实验室,陕西 西安 710021
  • 收稿日期:2018-07-12 修回日期:2018-10-12 出版日期:2019-04-05 发布日期:2019-04-05
  • 通讯作者: 张瑶
  • 作者简介:<named-content content-type="corresp-name">郭睿</named-content>(1959—),男,教授,硕士,研究方向为表面活性剂。|张瑶,硕士研究生,研究方向为废水处理。E-mail:<email>543100811@qq.com</email>。
  • 基金资助:
    陕西省重点研发计划(2017ZDXM-GY-087,2017GY-185)

Flocculation performance of kaolin loading HPCS-MA on methylene blue wastewater

Rui GUO,Yao ZHANG(),Wanwan GAO,Shuang HAN,Ning WANG   

  1. Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi’an 710021, Shaanxi, China
  • Received:2018-07-12 Revised:2018-10-12 Online:2019-04-05 Published:2019-04-05
  • Contact: Yao ZHANG

摘要:

以羟丙基壳聚糖(HPCS)、马来酸酐(MA)为原料合成N-马来酰化羟丙基壳聚糖(HPCS-MA)。采用红外光谱(FTIR)、核磁共振氢谱(1H NMR)对其结构进行表征。考察了缚酸剂三乙胺用量、反应温度、反应时间及马来酸酐用量对产物羧基含量及特性黏数的影响。结果表明:在缚酸剂用量为5g,反应温度65℃,反应时间6h,马来酸酐用量为4.5g的条件下,产物的羧基含量和特性黏数均达到较佳值,为83.50%和211.96mL/g。利用高岭土负载HPCS-MA处理亚甲基蓝印染废水,研究了pH、投加量、絮凝温度、初始浊度对亚甲基蓝染料脱色性能的影响。结果表明,在亚甲基蓝浓度为3×10-5mol/L的印染废水中,HPCS-MA絮凝脱色的适宜条件为:pH为1~5,投加量为4~8mg/L,温度为20~25℃,浊度为200~400NTU,在此条件下色度去除率均在96.5%以上。

关键词: 羟丙基壳聚糖, 马来酸酐, 亚甲基蓝, 脱色

Abstract:

Hydroxypropyl chitosan (HPCS) and maleic anhydride (MA) were used as raw materials to synthesize N-maleated hydroxypropyl chitosan (HPCS-MA). FTIR, 1H NMR were used to characterize the structure of the sample. The effect of the amount of acid-binding agent triethylamine, reaction temperature, reaction time and the amount of maleic anhydride on the carboxyl content and intrinsic viscosity of the product was investigated. The results showed that under the conditions of acid binding agent dosage 5g, reaction temperature 65℃, reaction time 6h and MA dosage 4.5g, both carboxyl content and intrinsic viscosity of the product reached a good value of 83.50% and 211.96mL/g. The methylene blue printing and dyeing wastewater were treated with kaolin-loaded HPCS-MA. The effect of pH, dosage, flocculation temperature and initial turbidity on the decolorization performance of methylene blue dye was studied. The results showed that in the printing and dyeing wastewater with methylene blue concentration of 3×10-5 mol/L, the suitable conditions for flocculation and decolorization of HPCS-MA was pH=1—5, dosage was 4—8mg/L, temperature was 20—25℃, initial turbidity was 200—400 NTU. Under these conditions, the chroma removal rate was above 96.5% .

Key words: hydroxypropyl chitosan, maleic anhydride, methylene blue, decolorization

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