From harmful Microcystis blooms to multi-functional core-double-shell microsphere bio-hydrochar materials

Bi, L. and Pan, G. ORCID: 0000-0003-0920-3018, 2017. From harmful Microcystis blooms to multi-functional core-double-shell microsphere bio-hydrochar materials. Scientific Reports, 7: 15477. ISSN 2045-2322

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Abstract

Harmful algal blooms (HABs) induced by eutrophication is becoming a serious global environmental problem affecting public health and aquatic ecological sustainability. A novel strategy for the utilization of biomass from HABs was developed by converting the algae cells into hollow mesoporous biohydrochar microspheres via hydrothermal carbonization method. The hollow microspheres were used as microreactors and carriers for constructing CaO2 core-mesoporous shell-CaO2 shell microspheres (OCRMs). The CaO2 shells could quickly increase dissolved oxygen to extremely anaerobic water in the initial 40 min until the CaO2 shells were consumed. The mesoporous shells continued to act as regulators restricting the release of oxygen from CaO2 cores. The oxygen-release time using OCRMs was 7 times longer than when directly using CaO2. More interestingly, OCRMs presented a high phosphate removal efficiency (95.6%) and prevented the pH of the solution from rising to high levels in comparison with directly adding CaO2 due to the OH− controlled-release effect of OCRMs. The distinct core-doubleshell micro/nanostructure endowed the OCRMs with triple functions for oxygen controlled-release, phosphorus removal and less impact on water pH. The study is to explore the possibility to prepare smarter bio-hydrochar materials by utilizing algal blooms.

Item Type: Journal article
Publication Title: Scientific Reports
Creators: Bi, L. and Pan, G.
Publisher: Macmillan Publishers Limited
Date: 13 November 2017
Volume: 7
ISSN: 2045-2322
Identifiers:
NumberType
10.1038/s41598-017-15696-9DOI
Rights: Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Depositing User: Jill Tomkinson
Date Added: 15 Nov 2017 09:35
Last Modified: 20 Jul 2018 13:32
URI: http://irep.ntu.ac.uk/id/eprint/32024

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