Synergistic control of internal phosphorus loading from eutrophic lake sediment using MMF coupled with submerged macrophytes

Zisen Liu; Yi Zhang; Pan Yan; Ji Luo; Lingwei Kong; Junjun Chang; Biyun Liu; Dong Xu; Feng He; Zhenbin Wu

doi:10.1016/j.scitotenv.2020.138697

Synergistic control of internal phosphorus loading from eutrophic lake sediment using MMF coupled with submerged macrophytes

Sci Total Environ. 2020 Aug 20:731:138697. doi: 10.1016/j.scitotenv.2020.138697. Epub 2020 May 5.

Authors

Zisen Liu¹, Yi Zhang², Pan Yan³, Ji Luo⁴, Lingwei Kong⁵, Junjun Chang⁶, Biyun Liu¹, Dong Xu¹, Feng He¹, Zhenbin Wu¹

Affiliations

¹ State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
² State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China. Electronic address: zhangyi@ihb.ac.cn.
³ State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
⁴ Center for Environmental Research and Technology, University of California-Riverside, California, USA.
⁵ Environmental Research and Design Institute of Zhejiang Province, Hangzhou 310007, China.
⁶ School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China.

PMID: 32438085
DOI: 10.1016/j.scitotenv.2020.138697

Abstract

Sediment phosphorus (P) is the main source of endogenous P for lake eutrophication. An in-situ combined technology for determination the removal effect of sediment P in all fractions was first developed using the novel modified maifanite (MMF) and submerged macrophytes in this study. MMF was synthesized using an acidification process (2.5 mol/L H₂SO₄) and then a calcination (400 °C) method. The morphology and structure of MMF were characterized by XRD, SEM, XPS, and BET. We tested the removal effects of sediment P by MMF and submerged macrophytes in combination and separately. The results demonstrated that the synergistic removal capacity of sediment P using MMF coupled with submerged macrophytes was higher than the sum of them applied separately. MMF could promote the submerged macrophytes growth and enhance the adsorption of extra P on MMF through root oxygenation and nutrient allocation. The microcosm experiment results showed that sediment from fMMF+V. spiralis exhibited the most microbial diversity and abundance among the sediment. The combination of MMF and submerged macrophytes increased the Firmicutes abundance and decreased the Bacteroidetes. These results indicated that adsorption-biological technology can be regarded as a novel and competitive technology to the endogenous pollution control in eutrophic shallow lakes.

Keywords: Endogenous pollution control; Modified maifanite (MMF); Sediment phosphorus; Submerged macrophyte; Synergistic effect.

MeSH terms

Adsorption
Eutrophication
Geologic Sediments
Lakes*
Phosphorus*

Substances

Phosphorus