基于弱相互作用力的共混型吸附剂去除六价铬离子
Blended Adsorbents Based on Weak Interaction Forces for Removing Hexavalent Chromium Ions
罗越峰 1施鹏 1陈俊良 1喻安平 1冯信鑫1
作者信息
- 1. 西南石油大学化学化工学院, 四川 成都 610500
- 折叠
摘要
本研究采用聚乙二醇(PEG)与单宁酸(TA)的氢键和范德华力等弱相互作用力制备了一种新型混凝剂.在Fe2+的辅助下,Cr(Ⅵ)可在中性条件下形成沉淀.Cr(Ⅵ)质量浓度在 2h内可由 100 mg/L降至<0.1 mg/L.且Fe2+的用量缩减为目前工业技术的1/3.去除过程涉及氧化还原-螯合、电荷相互作用和物理包裹等多种相互作用.由于反应条件温和、去除效率高,有望成为一种具有较大应用前景的新型除铬技术.
Abstract
This study prepared a new type of coagulant using weak interactions such as hydrogen bonding and van der Waals forces between polyethylene glycol(PEG)and tannic acid(TA).With the assistance of Fe2+,Cr(VI)can form precipitates under neutral conditions.The mass concentration of Cr(VI)can be reduced from 100 mg/L to<0.1 mg/L within 2 hours.And the amount of Fe2+ used has been reduced to one-third of the current industrial technology.The removal process involves various interactions such as oxidation-reduction chelation,charge interaction,and physical encapsulation.Due to mild reaction conditions and high removal efficiency,it is expected to become a new type of chromium removal technology with great application prospects.
关键词
混凝/六价铬去除/聚乙二醇/丹宁酸/弱相互作用力Key words
coagulation/hexavalent chromium removal/polyethylene glycol/tannic acid/weak interaction引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据