无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2020, Vol. 52 ›› Issue (12): 59-63.doi: 10.11962/1006-4990.2020-0044

• 环境·健康·安全 • 上一篇    下一篇

MXene@CS复合絮凝剂的制备及其对刚果红去除的研究

南岚1(),连超群1,耿慧凯1,张伟1,2,3,万红友1   

  1. 1.郑州大学生态与环境学院,河南郑州 450001
    2.郑州市水资源与水环境重点实验室
    3.郑州大学黄河生态保护与区域协调发展研究院
  • 收稿日期:2020-06-18 出版日期:2020-12-10 发布日期:2020-12-15
  • 作者简介:南岚(1995— ),女,硕士,主要研究方向为污水处理;Email:zzunanlan@163.com
  • 基金资助:
    国家自然科学基金(51779230);国家自然科学基金(51509223);河南省高等学校重点科研项目(18B610008);河南省高等学校重点科研项目(19A610010);河南省重点研发与推广专项(182102311033);国家博士后基金面上项目(2018M632799)

Synthesis of MXene@CS composite flocculant and its application in removal of Congo red dye from aqueous solution

Nan Lan1(),Lian Chaoqun1,Geng Huikai1,Zhang Wei1,2,3,Wan Hongyou1   

  1. 1. College of Ecology and Environment,Zhengzhou University,Zhengzhou,450001,China
    2. Zhengzhou Key Laboratory of Water Resource and Environment
    3. Yellow River Institute for Ecological Protection & Regional Coordinated Development,Zhengzhou University
  • Received:2020-06-18 Online:2020-12-10 Published:2020-12-15

摘要:

壳聚糖(CS)因具有大量的羟基和氨基,可为吸附色素污染物提供较多活性位点,但其在酸性条件易于溶解。MXene可为CS提供支撑位点,从而构建新型MXene@CS复合材料。研究构建了新型Ti3C2TX@CS有机无机复合材料,并应用于刚果红的去除研究。通过对Ti3C2TX@CS的微观形貌、晶体结构、表面官能团等进行表征分析,发现Ti3C2TX@CS的复合过程为物理复合。絮凝实验结果表明:在Ti3C2TX@CS投加量为30 mg、溶液pH为9、反应时间为30 min、温度为25~60 ℃条件下,Ti3C2TX@CS对50 mL质量浓度为500 mg/L刚果红(CR)溶液的脱色率达到99%以上。通过实验结果和反应前后Ti3C2TX@CS电位变化推断,Ti3C2TX@CS对刚果红的去除机理主要是电中和作用和吸附架桥作用。

关键词: Ti3C2TX@CS, 刚果红, 絮凝剂, 脱色率

Abstract:

Chitosan(CS) has a large number of hydroxyl and amino groups,which can provide more active sites for adsorption of pigment pollutants,but it was easy to dissolve in acidic conditions.MXene could provide support sites for CS,thereby constructing a new type of MXene@CS composite material.A new type of Ti3C2TX@CS organic-inorganic composite was synt-hesized and applied in the removal of Congo red(CR).The Ti3C2TX@CS composite was proven to be physically compounded through the micromorphology,crystal structure and surface functional group analysis data.The experimental results showed that the decolorization rate of CR solution(500 mg/L) by synthesized Ti3C2TX@CS could exceed 99% at Ti3C2TX@CS dose of 30 mg,pH of 9,and reaction time of 30 min and the temperature range at 25~60 ℃.The experimental results and the change of Ti3C2TX@CS potential before and after the reaction were used to infer the Ti3C2TX@CS to Congo red.The removal mecha-anism is the action of electrical neutralization and adsorption bridging.

Key words: Ti3C2TX@CS, Congo red(CR), flocculant, decolorization rate

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