Effect of humic acid on arsenic release behavior from polyethylenefilm loaded by ferric lignin
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摘要：
将吸附砷饱和后的载木质素铁聚乙烯薄膜固定于容器底部,采用静态批实验方法,添加不同质量浓度腐殖酸,研究溶液pH值、砷及铁离子质量浓度随时间的变化情况,考察环境温度的影响,分析薄膜上砷的释放行为.结果表明,添加腐殖酸能促使砷离子释放;当添加腐殖酸质量浓度为1,2和3 mg/L时,79 d内砷离子最大释放率分别为13.12%,15.87%和18.21%.实验温度范围内,温度变化对砷离子释放没有影响.光学显微镜测试表明腐殖酸引起的砷离子释放不会影响薄膜表面形貌;液相-有机碳联用测试仪(LC-OCD)和扫描电镜(SEM)测试表明腐殖酸在载木质素铁聚乙烯薄膜表面形成覆盖层,并且实验后薄膜表面的疏松孔增多.腐殖酸通过影响实验体系pH值、与薄膜上铁氧化物结合、占据有效吸附位点引起薄膜上砷离子的释放;而偏酸性溶液导致薄膜上少量铁离子的溶出,也促进了砷离子的释放.
Batches of static experiments were used to study the arsenic release from the polyethylene film loaded by ferric lignin after saturated with arsenic adsorption,which was fixed in a container.By adding different concentrations of humic acid,the changes of pH value,changes of arsenic and iron concentrations with time,and the effect of environmental temperature were investigated.The results showed that the addition of humic acid could promote the release of arsenic,and when the concentration of humic acid was 1,2 and 3 mg/L,the maximum arsenic release rate within 79 days was 13.12%,15.87%and 18.21%,respectively.While the temperature was 5,15,25 or 43℃examined in this work,changes of the temperature had no effect on arsenic release.Microscope images showed that arsenic release mediated by humic acid had no effect on the surface morphology of the film.LC-OCD and SEM results showed that there were covering layers formed by humic acid on the surface of film,of which the surface was looser.Therefore,humic acid mediated the release of arsenic on the film by changing the pH value of the experimental system,binding with iron oxides and occupying the effective adsorption sites on the film,while the acidity of the solution led to the dissolution of a small amount of iron ions on the film,which also promoted the release of arsenic.
作者：
张小转 赵可江 田振邦 黄做华 远冰冰 胡平 武大鹏 朱桂芬 赵亮
Zhang Xiaozhuan;Zhao Kejiang;Tian Zhenbang;Huang Zuohua;Yuan Bingbing;Hu Ping;Wu Dapeng;Zhu Guifen;Zhao Liang(School of Environments,Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control,Ministry of Education,Henan International Joint Lab of Key Technology in Water Treatment,Key Lab of Green Chemistry Media&Reaction,Ministry of Education,Collaborative Innovation Center for Green Manufacturing in Fine Chemicals,Henan Normal University,Xinxiang 453007,China;School of Chemistry and Chemical Engineering,Key Lab of Green Chemistry Media&Reaction,Ministry of Education,Collaborative Innovation Center for Green Manufacturing in Fine Chemicals,Henan Normal University,Xinxiang 453007,China;Institute of Chemistry Co.,Ltd Henan Academy of Sciences,Henan International Joint Laboratory of Functional Materials for Environmental Application,Zhengzhou 450002,China)
机构地区：
betway官方app 环境学院 betway官方app 化学化工学院 河南省科学院化学研究所有限公司河南省环境功能材料国际联合实验室
出处：
《betway官方app 学报：自然科学版》 CAS 北大核心 2022年第6期121-129,I0006,共10页
Journal of Henan Normal University(Natural Science Edition)
基金：
国家自然科学基金(41907121) 河南省科技攻关项目(212102310523) 河南省科学院基础科研项目(220603094).
关键词：
腐殖酸 砷 释放 载木质素铁聚乙烯薄膜
humic acid arsenic release polyethylene film loaded by ferric lignin
分类号：
X501 [环境科学与工程—环境工程]
