Enhancement of phosphorus storage capacity of sediments by coastal wetland restoration, Yellow River Delta, China. (January 2020)

• Record Type: Journal Article
• Authors: Xu, Gang; Song, Jiawei; Zhang, Yang; Lv, Yingchun; Han, Guangxuan
• Is Part Of: Marine pollution bulletin. Volume 150(2020)
• Publication Date: 2020-01
• Subjects: Yellow river delta -- Phosphorus storage capacity -- Degree of phosphorus saturation -- Eutrophication risk index; P Phosphorus -- YRD Yellow River Delta -- EPC0 equilibrium phosphorus concentration -- NAP native adsorbed phosphorus concentration -- Qmax maximum phosphorus sorption capacity -- DPS degree of phosphorus saturation -- ERI eutrophication risk index -- TOC total organic carbon -- TN total nitrogen -- TP total phosphorus -- PSI phosphorus sorption index -- k sorption constant -- MBC phosphorus maximum buffer capacity -- Kp solid-liquid partition coefficient -- Olsen-P available soil phosphorus; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2019.110666
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: Un-restored (R0 ) and restored (in 2006 (R2006 ) and in 2002, (R2002 )) coastal wetlands were selected to study phosphorus (P) storage capacity and the risk of P loss in the Yellow River Delta (YRD). The results showed that the maximum P sorption capacity (Qmax ) in the wetland sediments varied between 201.8–1168.6 mg kg −1 ; the average value was 576.2 mg kg −1 . Qmax increased with increasing time since restoration (R2002 > R2006 > R0 ). The eutrophication risk index (ERI) ranged between 0.27–2.07% and decreased with increasing time since restoration, but the relationship was not statistically significant (P > 0.05). A correlation analysis demonstrated that Feox, Mg, and Alox are the main P sorption agents in wetland sediments, whereas TOC, pH, and clay particles have an important effect on P sorption and release. The analysis suggests that we should restore degraded coastal wetlands to help reduce the P load to offshore waters. Highlights: Phosphorus sorption increased with coastal wetland restoration in Yellow River Delta, China. T he Feox 、Mg、and Alox content dominanted phosphorus sorption in Yellow River Delta sediments. Restored wetlands can be used for phosphorus reduction at coastal zone.