摘要
对风化煤腐殖酸(HA)进行季铵化改性得到季铵化腐殖酸(QHA),将HA与QHA用作水处理剂,对比两者的阻垢缓蚀性能。结果表明,QHA的阻垢率和缓蚀率均优于HA。QHA、HA投加量分别在20、30 mg/L时阻垢率达到最大值,分别为85.77%、73.50%。HA与QHA的缓蚀率均随投加量的增大而提高,投加量为40mg/L时,QHA的缓蚀率达82.10%,比HA高出22.51百分点。QHA热稳定性能更好,阻垢缓蚀的最佳pH为8~9。QHA具有良好的分散能力和灭藻能力,可在8h内实现高效灭藻。CaCO3垢样的扫描电镜、X射线衍射分析表明,加入QHA使垢体松散,呈碎状分布,晶格结构发生畸变,CaCO3晶面生长的有序度和完整度下降,从而表现出良好的阻垢性能。
The quaternized modification of weathered coal humic acid(HA)was performed to produce quaternized humic acid(QHA).The obtained QHA and HA were applied as water treatment agent,and their scale inhibition and corrosion inhibition performance were detected and compared.The results showed that the scale inhibition and corrosion inhibition rate of QHA were superior to that of HA.When QHA and HA dosage were 20 and30 mg/L seperatly,the scale inhibition rate reached the maximum value,which was 85.77%and 73.50%,respectively.The corrion inhibition rate of HA and QHA was increased with the increase of their dosage.When the dosage was 40 mg/L,the corrion inhibition rate of QHA reached 82.10%,22.51 percentage points higher than that of HA.The thermal stability of QHA was better than that of HA,and the optimum pH for scale inhibition and corrosion inhibition was 8-9.QHA had good dispersing ability and algal killing ability which could achieve efficient elimination of algae within 8 h.The scanning electron microscope and X-ray diffraction analysis of CaCO3 deposit showed that the addition of QHA made the scale loose and distribute in a fragmentary form where the lattice structure was distorted.As a result,the order degree and integrity of the growth of CaCO3 crystal surface decreased,thus showing agood scale inhibition performance.
作者
高乐
李金成
郭雅妮
李晨璐
胡陈真
GAO Le;LI Jincheng;GUO Yani;LI Chenlu;HU Chenzhen(Shaanxi Modern Architectural Design Research Institute,Xi’an Shaanxi 710048;School of Environmental and Chemical Engineering,Xi’an Polytechnic University,Xi’an Shaanxi 710048)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2020年第8期948-952,共5页
Environmental Pollution & Control
基金
陕西省重点研发计划项目(No.2020SF-368、No.2019SF-242、No.2017GY-121)
西安市科学技术局科技创新引导项目(No.201805030YD8CG14(13))。
关键词
季铵化改性
腐殖酸
阻垢
缓蚀
灭藻
quaternized modification
humic acid
scale inhibition
corrosion inhibition
elimination of algae
