Research progress in photodegradation of lignin in aquatic environments and its effect on relevant indicative parameters of organic matter
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Abstract:
Lignin is one of the major components of terrestrial organic matter, as well as a good biomarker of terrestrial organic matter. The photodegradation of lignin in aquatic environments can significantly affect its indicative parameters. Firstly, this review introduced the structure of lignin and its application as a biomarker. Then, the mechanism and influencing factors of lignin photodegradation in aquatic environments were described and discussed. Meanwhile, the changes of lignin indicative parameters and other organic matter parameters (13C isotope, CDOM, et al.) caused by the photodegradation, as well as researches about lignin photodegradation in rivers, estuaries and offshore were summarized. Finally, some possible research fields of lignin photodegradation in water environment were pointed out, including the use of CDOM optical spectrum measurements to characterize the photodegradation of lignin, combining with other parameters to characterize the sources and strengthening the study of the interaction between photodegradation and biodegradation.
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