[1]杨毅,兰亚琼,金鹏康,等.水环境中腐殖酸的荧光参数及其与重金属络合常数特征[J].西安建筑科技大学学报(自然科学版),2017,49(03):432-437.[doi:10.15986/j.1006-7930.2017.03.019]
　YANG Yi,LAN Yaqiong,JIN Pengkang,et al.Characteristics of fluorescence parameters of humic acids in water environment and their complexing constants with heavy metals[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2017,49(03):432-437.[doi:10.15986/j.1006-7930.2017.03.019]
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水环境中腐殖酸的荧光参数及其与重金属络合常数特征()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
49
期数:
2017年03期
页码:
432-437
栏目:
出版日期:
2017-06-30

文章信息/Info

Title:
Characteristics of fluorescence parameters of humic acids in water environment and their complexing constants with heavy metals
文章编号:
1006-7930(2017)03-0432-06
作者:
杨毅1; 3; 兰亚琼4; 金鹏康1; 3; 徐会宁1; 2
（1. 西安建筑科技大学环境与市政工程学院，陕西 西安 710055；2. 西安建筑科技大学陕西省环境工程重点实验室，陕西 西安 710055；3. 西安建筑科技大学国家级环境专业实验教学示范中心，陕西 西安 710055；4. 浙江清华长三角研究院生态环境研究所，浙江省水质科学与技术重点实验室，浙江 嘉兴 314006）
Author(s):
YANG Yi1; 3;  LAN Yaqiong4;  JIN Pengkang1; 3;  XU Huining1; 2
(1. School of Environmental & Municipal Engineering, Xi′an Univ. of Arch. & Tech.，Xi′an 710055, China; 2. Shaanxi Key Laboratory of Environmental Engineering, Xi′an Univ. of Arch. & Tech., Xi′an 710055, China; 3. Experimental Teaching Demonstration Center of National Environmental Specialty, Xi′an Univ. of Arch. & Tech., Xi′an 710055, China; 4. Department of Environmental Technology and Ecology, Yangtze Delta Region Institute of Tsinghua University, Key Laboratory for Water Science and Technology of Zhejiang Province, Jiaxing 314006, China)
关键词:
腐殖酸; 荧光参数; 重金属; 络合常数
Keywords:
humic acid;  fluorescence parameter; heavy metal; complexing constant
分类号:
X131
DOI:
10.15986/j.1006-7930.2017.03.019
文献标志码:
A
摘要:
采用三维激发-发射矩阵荧光光谱法（3DEEM），研究pH值和离子强度对腐殖酸荧光峰荧光强度比值和荧光指数的影响，并确定腐殖酸荧光峰所代表物质与重金属络合能力. 结果表明：在某一pH值范围内，腐殖酸荧光峰荧光强度比值与pH值存在着一定的线性关系. 腐殖酸荧光峰荧光强度比值较显著地依赖于溶液离子强度. pH值为10.0时荧光指数最小. 商品腐殖酸和天然腐殖酸的荧光指数分别在1.14~1.30和1.55~1.87.商品腐殖酸位于(270~280)nm/(420~448)nm荧光峰代表的有机物与Cu2+或Cd2+络合产物的稳定程度比其位于(335~405)nm/(380~472)nm荧光峰所代表的类腐殖酸与Cu2+或Cd2+络合产物的较强.腐殖酸荧光峰所代表的有机物与Cu2+结合能力比其与Cd2+的强.不同腐殖酸荧光峰所代表有机物与不同重金属络合能力存在差异.
Abstract:
A laboratory study was conducted to investigate the influence of pH and ionic strength on the ratio of fluorescence peaks′ intensity(r)and the fluorescence index(FI) of humic acids(HA), and to determine the complexing ability of the substance represented by HA fluorescence peaks with heavy metals by using three-dimensional excitation-emission matrix fluorescence spectroscopy(3DEEM). The results showed that the r of HA had a certain linear relationship with pH in a certain pH range. And the r was significantly dependent on the ionic strength. The FI was minimal at pH 10.0. The FI of commodity humic acid(CHA) and natural humic acid(NHA) were 1.14 ~ 1.30 and 1.55 ~ 1.87 respectively.The binding products of the humic-like acid represented by the CHA fluorescence peak located at (270~280)nm /(420~448)nm with Cu2+ or Cd2+had a stronger degree of stability than that of the humic-like acid represented by fluorescence peak located at (335~405)nm/(380~472)nm with Cu2+ or Cd2+.The complexing ability of the organic matters represented by fluorescence peaks with Cu2+ was stronger than that with Cd2+.There was a difference in the complexing ability of the organic matters represented by the fluorescence peaks of the different HAs with different heavy metals.

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备注/Memo

备注/Memo:
收稿日期:2016-07-13 修改稿日期:2017-05-24 基金项目:国家自然科学基金资助项目(21407119)；陕西省教育厅专项科研计划基金资助项目(15JK1440) 作者简介:杨毅（1976-），女，博士，副教授，主要从事环境科学与工程的教学和科研工作．E-mail:yangyi@xauat.edu.cn
更新日期/Last Update: 2017-08-27