Characterization of Dissolved Organic Matter Fractions in the Ning-Meng Section of the Yellow River and Relationship with Metal Ions

被引：3
|
作者：
Xi Y. [1 ]
Wang T. [1 ]
Ni J.-R. [1 ]
Han P. [1 ]
Yi M.-L. [1 ]
Zheng T. [1 ]
Jiang Y. [1 ]
Ma R.-Q. [1 ]
Cui F. [1 ]
机构：
[1] Key Laboratory of Water and Sediment Sciences, Department of Environmental Engineering, Peking University, Beijing
来源：
Huanjing Kexue/Environmental Science | 2018年 / 39卷 / 09期
关键词：
Dissolved organic matter(DOM); Fluorescence quenching; Heavy metal; Hydrophilic matter(HYI); XAD resin;
D O I：
10.13227/j.hjkx.201712249
中图分类号：
学科分类号：
摘要：
Dissolved organic matter(DOM)is an important element of natural aquatic systems. Due to differences in their hydrophobic/hydrophilic properties and various functional groups, chemical appearances of DOM fractions also vary. In this study, seven natural waters, extending from Xiaheyan to Toudaoguai along the Ning-Meng section of the Yellow river, were sampled in April 2015. Four DOM fractions were obtained by pumping through XAD-4 and XAD-8 resins, i.e., hydrophobic acid (HOA), hydrophobic base (HOB), weak hydrophobic acid (WHOA), and hydrophilic matter (HYI). Based on detection by three-dimensional excitation-emission matrix fluorescence (EEM) and correlation analysis, relationships with five metal ions (Pb, Zn, Cu, Cr, As) were analyzed. Results show that DOC gradually increased along an upstream to downstream continuum in the Ning-Meng section. HYI (small molecular proteins) was the main DOM fraction present, followed by HOA, suggesting enhanced microbial-sourced impact from industrial sewage discharges. The significant peaks of humic-like (A, C) and protein-like compounds (T 1 ) in the EEM chart further highlight the effect of endogenous pollution caused by wastewater. Furthermore, SPSS fitting results indicate that DOM is correlated with all five metal ions, especially with Cu. In terms of the four DOM fractions, HYI showed the strongest correlation with Cu, illustrating the significant relationship between HYI and Cu during the migration and transformation process. Moreover, the fluorescence intensity of protein-like compounds decreased with increasing Cu concentration, possibly due to fluorescence quenching caused by complexation between Cu and proteins in HYI. © 2018, Science Press. All right reserved.
引用
收藏
页码：4114 / 4121
页数：7
相关论文
共 34 条
  • [1] Liu X.F., Li K.S., Gao H.W., Et al., Research and protective strategy of the fishery resource in Ningxia-Neimeng River reach of Yellow River trunk stream, Journal of Hydroecology, 3, 4, pp. 135-141, (2010)
  • [2] Zhang Y., Li F.D., Ouyang Z., Et al., Distribution and health risk assessment of heavy metals of groundwaters in the irrigation district of the lower reaches of Yellow River, Environment Science, 34, 1, pp. 121-128, (2013)
  • [3] Burton G.A., Metal bioavailability and toxicity in sediments, Critical Reviews in Environmental Science & Technology, 40, 9-10, pp. 852-907, (2010)
  • [4] Ahmad J.U., Goni M.A., Heavy metal contamination in water, soil, and vegetables of the industrial areas in Dhaka, Bangladesh, Environmental Monitoring and Assessment, 166, 1-4, pp. 347-357, (2010)
  • [5] Feng H.J., Hu L.F., Shan D., Et al., Assessment on the risk of aquatic humics and prospect on its removal technology, Bulletin of Science and Technology, 24, 4, pp. 553-558, (2008)
  • [6] Klavins M., Eglite L., Immobilisation of humic substances, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 203, 1-3, pp. 47-54, (2002)
  • [7] Tian L.F., Hu J.W., Li C.X., Et al., Evaluation of a typical plateau deep lake by DOM spectral characteristics, Engineering Sciences, 12, 6, (2010)
  • [8] Leenheer J.A., Croue J.P., Peer reviewed: characterizing aquatic dissolved organic matter, Environmental Science & Technology, 37, 1, pp. 18A-26A, (2003)
  • [9] Smith D.S., Kramer J.R., Multi-site proton interactions with natural organic matter, Environment International, 25, 2-3, pp. 307-314, (1999)
  • [10] Al-Rasheed R., Cardin D.J., Photocatalytic degradation of humic acid in saline waters: Part 2. Effects of Various Photocatalytic materials, Applied Catalysis A: General, 246, 1, pp. 39-48, (2003)
1234