Efficient removal of Phaeocystis globosa from seawater with the persulfate activation by arbutin-modified cellulose nanocrystals

Mingda Che; Cancan Shan; Wenjie Zhang; Yanyi Duan; Renliang Huang; Mei Cui; Wei Qi; Rongxin Su

doi:10.1016/j.chemosphere.2022.137647

Efficient removal of Phaeocystis globosa from seawater with the persulfate activation by arbutin-modified cellulose nanocrystals

Chemosphere. 2023 Feb:313:137647. doi: 10.1016/j.chemosphere.2022.137647. Epub 2022 Dec 24.

Authors

Mingda Che¹, Cancan Shan¹, Wenjie Zhang², Yanyi Duan¹, Renliang Huang³, Mei Cui¹, Wei Qi¹, Rongxin Su⁴

Affiliations

¹ State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
² China Nuclear Power Engineering Co., Ltd., No.117, West Third Ring Road North, Haidian District, Beijing 100840, China.
³ Key Laboratory of Ocean Observation Technology of Ministry of Natural Resources, School of Marine Science and Technology, Tianjin University, Tianjin 300072, PR China; Zhejiang Institute of Tianjin University, Ningbo, Zhejiang, 315201, China. Electronic address: tjuhrl@tju.edu.cn.
⁴ State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; Key Laboratory of Ocean Observation Technology of Ministry of Natural Resources, School of Marine Science and Technology, Tianjin University, Tianjin 300072, PR China; Zhejiang Institute of Tianjin University, Ningbo, Zhejiang, 315201, China. Electronic address: surx@tju.edu.cn.

PMID: 36574786
DOI: 10.1016/j.chemosphere.2022.137647

Abstract

Harmful algal blooms (HABs) from seawater have a severe threat to human health, aquaculture, and coastal nuclear power safety. Thus, it is highly desirable to explore environmentally friendly, efficient, and economic methods for controlling HABs. Herein, the arbutin-modified cellulose nanocrystals (AT-CNC) activated persulfate (PS), as a novel heterogeneous Fenton-like process, was proposed to remove Phaeocystis globosa (P. globosa) from seawater. The AT-CNC was synthesized via the surface modification of AT on CNC. The effects of AT dosage, CNC dosage, and PS dosage on the removal performance of P. globosa were investigated. With the addition of 530 mg/L AT-CNC (6 wt% AT/CNC of AT loading) and 120 mg/L PS, the removal percentage of chlorophyll a (R_c), optical density at 680 nm (R_o) and turbidity (R_t) reached 97.7%, 91.9% and 85.2% at 24 h. According to electron paramagnetic resonance (EPR) spectra and radical quenching tests, the predominant free radicals inactivating P. globosa were hydroxyl radicals (^•OH). Additionally, the flocculation of the inactivated algae cells by AT-CNC was also critical for removing P. globosa. Moreover, a positive environmental impact was achieved in the AT-CNC-PS system due to the reduction of nitrogen, phosphorus and organic carbon contents. Based on the excellent removal performance for P. globosa, we believe that the AT-CNC activated persulfate is a promising option for HABs control.

Keywords: Arbutin; Cellulose nanocrystals; Harmful algal blooms; Persulfate; Phaeocystis globosa.

MeSH terms

Arbutin / pharmacology
Chlorophyll A
Haptophyta*
Harmful Algal Bloom
Humans
Seawater

Substances

Arbutin
Chlorophyll A