title: Assessing the impacts of phosphorus inactive clay on phosphorus release control and phytoplankton community structure in eutrophic lakes.
abstract: Addressing the challenge that phosphorus is the key factor and cause for eutrophication, we evaluated the phosphorus release control performance of a new phosphorus inactive clay (PIC) and compared with Phoslock®. Meanwhile, the impacts of PIC and Phoslock®on phytoplankton abundance and community structure in eutrophic water were also discussed. With the dosage of 40 mg/L, PIC effectively removed 97.7% of total phosphorus (TP) and 98.3% of soluble reactive phosphorus (SRP) in eutrophic waters. In sediments, Fe/Al-phosphorus and organic phosphorus remained stable whereas Ca-phosphorus had a significant increase of 13.1%. The results indicated that PIC may form the active overlay at water-sediment interface and decrease the bioavailability of phosphorus. The phytoplankton abundance was significantly reduced by PIC and decreased from (1.0-2.4) × 107cells/L to (1.3-4.3) × 106cells/L after 15 d simultaneous experiment. The phytoplankton community structure was also altered, where Cyanobacteria and Bacillariophyceae were the most inhibited and less dominant due to their sensitivity to phosphorus. After PIC treatment, the residual lanthanum concentration in water was 1.44-3.79 μg/L, and the residual aluminium concentration was low as 101.26-103.72 μg/L, which was much less than the recommended concentration of 200 μg/L. This study suggests that PIC is an appropriate material for phosphorus inactivation and algal bloom control, meaning its huge potential application in eutrophication restoration and management.
authors.affiliation: Environmental Science and Engineering College, Fujian Normal University, Fuzhou 350007, PR China; Fujian Key Laboratory of Pollution Control and Resource Recycling, Fuzhou 350007, PR China.
authors.forename: Yuping
authors.initials: Y
authors.lastname: Su
authors.affiliation: Environmental Science and Engineering College, Fujian Normal University, Fuzhou 350007, PR China.
authors.forename: Chaowei
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Environmental Science and Engineering College, Fujian Normal University, Fuzhou 350007, PR China; Fujian Key Laboratory of Pollution Control and Resource Recycling, Fuzhou 350007, PR China.
authors.forename: Jianxi
authors.initials: J
authors.lastname: Liu
authors.affiliation: Environmental Science and Engineering College, Fujian Normal University, Fuzhou 350007, PR China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Weng
authors.affiliation: Environmental Science and Engineering College, Fujian Normal University, Fuzhou 350007, PR China.
authors.forename: Helong
authors.initials: H
authors.lastname: Li
authors.affiliation: Environmental Science and Engineering College, Fujian Normal University, Fuzhou 350007, PR China; Lancaster Environment Centre, Lancaster University, Lancaster LA1 2YW, United Kingdom. Electronic address: d.zhang@lancaster.ac.uk.
authors.forename: Dayi
authors.initials: D
authors.lastname: Zhang
mesh_terms: D000535:Aluminum / Q000032:analysis; D000538:Aluminum Silicates / Q000737:chemistry* / Q000494:pharmacology*; D001546:Bentonite / Q000737:chemistry; D001682:Biological Availability; D000077215:Clay; D000458:Cyanobacteria / Q000187:drug effects; D017377:Diatoms / Q000187:drug effects; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005068:Eutrophication / Q000187:drug effects*; D060106:Lakes / Q000737:chemistry*; D007811:Lanthanum / Q000032:analysis; D010758:Phosphorus / Q000737:chemistry* / Q000302:isolation & purification* / Q000494:pharmacology; D010839:Phytoplankton / Q000187:drug effects* / Q000254:growth & development
chemical_list: D000538:Aluminum Silicates; D001546:Bentonite; D010758:Phosphorus; D007811:Lanthanum; D000535:Aluminum; D000077215:Clay
keywords: Eutrophication; Phoslock(®); Phosphorus; Phosphorus inactive clay (PIC); Phytoplankton community; Water-sediment interface