PMID- 35686784
OWN - NLM
STAT- MEDLINE
DCOM- 20220613
LR  - 20220804
IS  - 0250-3301 (Print)
IS  - 0250-3301 (Linking)
VI  - 43
IP  - 6
DP  - 2022 Jun 8
TI  - [Spectral Characteristics Change in Dissolved Organic Matter in Urban River Under 
      the Influences of Different Intensities of Non-point Source Pollution].
PG  - 3149-3159
LID - 10.13227/j.hjkx.202106001 [doi]
AB  - With the method of ultraviolet-visible absorption spectroscopy (UV-vis) and 
      excitation-emission matrix spectroscopy combined with parallel factor analysis 
      (EEMs-PARAFAC), this study analyzed the change in dissolved organic matter (DOM) 
      content and composition in spring and summer of two non-point source urban rivers 
      which had different input intensities. The results indicated that the level of 
      humification and molecular weight of DOM in summer was significantly higher than 
      that in spring in these two rivers (P<0.01). The PARAFAC model was used to 
      analyze four chemical compositions, including C1 (UVC fulvic-like), C2 
      (tryptophan-like), C3 (humic-like), and C4 (UVA fulvic-like); furthermore, 
      C1[(31+/-6)%] and C2[(31+/-4)%] were the main fluorescent contents of the water. The 
      high non-point source input river had a higher fluorescence intensity of all four 
      PARAFAC components in spring than in summer, contrary to the low non-point source 
      input river. The random forest regression model showed that C3% had the highest 
      sensitivity to the changes in water parameters (R(2)=0.75, P<0.001) and could be 
      an effective indicator. Additionally, the coverage level of the water surface 
      (Cover) had an essential effect on the prediction of C4% (P<0.001), and C4% was 
      susceptible to photochemical oxidation. According to the principal component 
      analysis (PCA) and Adonis test, nitrogen and phosphorus were the essential 
      impetuses for the biological process of the river; non-point source inputs and 
      seasonal changes had a significant impact on the urban river (R(2)=0.775, 
      P<0.001). The contents and compositions of urban river DOM were affected by many 
      essential factors. Non-point source inputs improved the input level of 
      terrestrial humus in the water and promoted the biological process at the same 
      time, dynamically contributing to the changes in the DOM of the water body.
FAU - Chen, Xu-Dong
AU  - Chen XD
AD  - School of Earth and Environment, Anhui University of Science and Technology, 
      Huainan 232001, China.
FAU - Gao, Liang-Min
AU  - Gao LM
AD  - School of Earth and Environment, Anhui University of Science and Technology, 
      Huainan 232001, China.
LA  - chi
PT  - Journal Article
PL  - China
TA  - Huan Jing Ke Xue
JT  - Huan jing ke xue= Huanjing kexue
JID - 8405344
RN  - 0 (Dissolved Organic Matter)
RN  - 059QF0KO0R (Water)
SB  - IM
MH  - *Dissolved Organic Matter
MH  - *Non-Point Source Pollution
MH  - *Rivers/chemistry
MH  - Water
OTO - NOTNLM
OT  - dissolved organic matter(DOM)
OT  - excitation-emission matrix spectroscopy(EEMs)
OT  - non-point source pollution
OT  - parallel factor analysis(PARAFAC)
OT  - ultraviolet-visible spectrum(UV-vis)
EDAT- 2022/06/11 06:00
MHDA- 2022/06/14 06:00
CRDT- 2022/06/10 08:13
PHST- 2022/06/10 08:13 [entrez]
PHST- 2022/06/11 06:00 [pubmed]
PHST- 2022/06/14 06:00 [medline]
AID - 10.13227/j.hjkx.202106001 [doi]
PST - ppublish
SO  - Huan Jing Ke Xue. 2022 Jun 8;43(6):3149-3159. doi: 10.13227/j.hjkx.202106001.