Sorption and distribution performance of organophosphorus compound (Adenosine 5'-monophosphate)on marine sediments

Xiao-Yan Cao; Yuan-Zhe Ni; Jing Li; Ling Li; Yi-Lin Zhao; Gui-Peng Yang

doi:10.1016/j.envpol.2022.119993

Sorption and distribution performance of organophosphorus compound (Adenosine 5'-monophosphate)on marine sediments

Environ Pollut. 2022 Oct 15:311:119993. doi: 10.1016/j.envpol.2022.119993. Epub 2022 Aug 19.

Authors

Xiao-Yan Cao¹, Yuan-Zhe Ni², Jing Li², Ling Li², Yi-Lin Zhao², Gui-Peng Yang³

Affiliations

¹ Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China.
² College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China.
³ Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China. Electronic address: gpyang@ouc.edu.cn.

PMID: 35995290
DOI: 10.1016/j.envpol.2022.119993

Abstract

In this paper, the kinetics and thermodynamics of Adenosine 5'-monophosphate (AMP) sorption on the sediments obtained from the Yangtze River Estuary and adjacent areas were studied, in combination with the effects of the sediments' properties and media conditions. The kinetics curves could be described by a two-compartment first-order equation, and the equilibrium isotherms fitted well with the modified Langmuir and Freundlich models. The analysis of organic phosphorus (OP) fractions changes after sorption indicated that the contents of exchangeable or loosely sorbed P_O increased most significantly. Higher organic matter (OM) of the sediments were favorable for the sorption ability. It was also found that the content of OP and OM in the sediments showed an obvious positive correlation, indicating that organic matter rather than Fe/Al oxides played an important role in the migration of OP in the Yangtze River estuary and its adjacent area. Temperature, salinity and pH of the media influenced the sorption of AMP significantly. Increase of temperature was of benefit to the sorption of AMP, which was a spontaneous and exothermic process according to the calculations of the thermodynamic parameters. The sorption capacity was higher at a moderate salinity in the range of our study. With the pH changing from 3 to 10, the sorption capacity exhibited as a "U-trend" curve.

Keywords: East China Sea; Organic phosphorus; Sediments; Sorption; Yangtze River Estuary.

MeSH terms

Adenosine
Adenosine Monophosphate
Adsorption
Geologic Sediments* / chemistry
Organophosphorus Compounds
Phosphorus / chemistry
Water Pollutants, Chemical* / analysis

Substances

Organophosphorus Compounds
Water Pollutants, Chemical
Phosphorus
Adenosine Monophosphate
Adenosine