Investigation of the flocculating activity of oyster shell powders on Microcystis aeruginosa with varying particle size and mechanical conditions

Wenli Qin; Kairong Qian; Xueya Liu; Xinyi Zhang; Zefei Chen; Min Wang; Yang Jia; Zengling Ma

doi:10.1007/s11356-023-25377-y

Investigation of the flocculating activity of oyster shell powders on Microcystis aeruginosa with varying particle size and mechanical conditions

Environ Sci Pollut Res Int. 2023 Mar;30(15):44353-44366. doi: 10.1007/s11356-023-25377-y. Epub 2023 Jan 24.

Authors

Wenli Qin^#^{1

2}, Kairong Qian^#^{1

2}, Xueya Liu^#^{1

2}, Xinyi Zhang^{1

2}, Zefei Chen^{1

2}, Min Wang^{1

2}, Yang Jia^{1

2}, Zengling Ma^{3

4}

Affiliations

¹ National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, People's Republic of China.
² Zhejiang Provincial Key Lab for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou, 325035, China.
³ National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, People's Republic of China. mazengling@wzu.edu.cn.
⁴ Zhejiang Provincial Key Lab for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou, 325035, China. mazengling@wzu.edu.cn.

^# Contributed equally.

PMID: 36692721
DOI: 10.1007/s11356-023-25377-y

Abstract

Harmful algal blooms have been a serious environmental problem. The flocculation of Microcystis aeruginosa by oyster shell powders prepared by aerobic calcination (CO), anaerobic calcination (CN), acidification anaerobic calcination (CAN), and deacetylation anaerobic calcination (CHN) was studied. The CO800 (100 mesh) and CN800 (160 mesh) presented the highest flocculation rate of 89.46% and 77.39% when they were stirred for 1 min with speed of 750 r/min and 250 r/min, respectively. The photosynthesis and viability of the algae cells flocculated by CO800 with particle size of 100 mesh were not significantly damaged. The phosphorus nutrient could be removed by CO800 and CN800 effectively due to the presence of Ca²⁺, which also limited Microcystis aeruginosa growth. The study showed that the processing of oyster shell powder could be used as an effective flocculating material.

Keywords: Flocculation; Mechanical; Microcystis aeruginosa; Oyster shell powders; Particle size.

MeSH terms

Animals
Harmful Algal Bloom
Microcystis*
Ostreidae*
Particle Size
Powders

Substances

Powders

Abstract

MeSH terms

Substances

Grants and funding