Optimization framework of sediment phosphate oxygen isotope pretreatment method based on large-scale application: A case study of Fuyang River basin
Jing Yang,
Chengyu Du,
Xin Jin,
Hengtong Lu,
Qingqing Chan,
Jiaxuan Zhang,
Hailong Ma,
Huiying Zeng,
Simin Li
Affiliations
Jing Yang
School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan, Hebei, 056038, China; School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China; Hebei Technology Innovation Center for Water Pollution Control and Water Ecological Remediation, Hebei University of Engineering, Handan, 056038, China; Hebei Key Laboratory of Intelligent Water Conservancy, Hebei University of Engineering, Handan 056038, China
Chengyu Du
School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
Xin Jin
School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China; Hebei Technology Innovation Center for Water Pollution Control and Water Ecological Remediation, Hebei University of Engineering, Handan, 056038, China; State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, P. O. Box 2871, Beijing, 100085, PR China; Corresponding author. School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
Hengtong Lu
School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
Qingqing Chan
School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
Jiaxuan Zhang
School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
Hailong Ma
School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
Huiying Zeng
School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
Simin Li
School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China; Hebei Technology Innovation Center for Water Pollution Control and Water Ecological Remediation, Hebei University of Engineering, Handan, 056038, China; Corresponding author. School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, Hebei, 056038, China
Phosphate oxygen isotope (δ18OP) technique is an effective tool to identify the source and transformation process of phosphorus. The poor applicability of existing δ18OP pretreatment methods for sediments hindered the large-scale application of δ18OP technology. This paper presents an optimization framework for the pretreatment of sediment δ18OP samples based on large-scale applications, using the Fuyang River Basin as a case study. The typical channel landscape outflow lake, South Lake, was selected as the most favorable point for assessing the applicability and optimizing the mainstream δ18OP pretreatment method, which was achieved by clarifying the sediment environmental characteristics of South Lake. To evaluate the suitability of the Blake and McLaughlin methods in South Lake, a comparative study was carried out based on five dimensions: phosphorus recovery rate, removal efficiency of organic matter, removal efficiency of extraction liquid impurity ion, experimental time, and reagent consumption cost. The findings demonstrated that the Blake method outperformed the McLaughlin method across all five dimensions. Based on the environmental characteristics of the sediments of South Lake, the Blake method was optimized from two perspectives, namely the substitution of reagents and adjustment and optimization of experimental procedures. This resulted in an enhancement of phosphorus recovery and organic matter removal efficiency, while also reducing the experimental time required. The optimized method also yielded satisfactory results when applied to the entire watershed. This research paper can thus offer valuable technical support for the widespread application of sediment δ18OP technology.
