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Article

Developing a Novel Alum Sludge-Based Floating Treatment Wetland for Natural Water Restoration

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School of Civil Engineering, Chang’an University, Xi’an 710054, China
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Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710054, China
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Shaanxi Union Research Center of University and Enterprise for River and Lake Ecosystems Protection and Restoration, Xi’an 710054, China
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School of Water and Environment, Chang’an University, Xi’an 710054, China
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State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
*
Author to whom correspondence should be addressed.
Academic Editor: Christos S. Akratos
Water 2022, 14(15), 2433; https://doi.org/10.3390/w14152433
Received: 29 July 2022 / Revised: 2 August 2022 / Accepted: 4 August 2022 / Published: 5 August 2022
(This article belongs to the Section Water Quality and Contamination)
Novel alum sludge-based floating treatment wetland (FTW) was developed to enhance the purification performances of natural water bodies, i.e., rivers, lakes, and ponds. Polyurethane was applied to foam the lightweight alum sludge based-substrate (PU-AL) of FTW through the response surface method. Three FTWs configurations were created for a half-year lab-scale operation, and the PU-AL FTW presents the greatest purification performance in the removal rate of chemical oxygen demand (COD) of 62.58 ± 6.65%, total nitrogen (TN) of 53.31 ± 4.65%, and total phosphorus (TP) of 45.39 ± 4.69%. PU-AL substrate could enhance the nutrient removal performance of existing FTW by providing a proper media for microbial and plants’ growth. This study provides a good solution and showcase not only from a natural water restoration point of view but also from the waterworks sludge management view for a better understanding of FTWs and good applications in engineering practice. View Full-Text
Keywords: circular economy; constructed wetlands; natural based solutions; organic foaming materials; substrates; waterworks residues circular economy; constructed wetlands; natural based solutions; organic foaming materials; substrates; waterworks residues
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MDPI and ACS Style

He, X.; Zhao, X.; Zhang, W.; Ren, B.; Zhao, Y. Developing a Novel Alum Sludge-Based Floating Treatment Wetland for Natural Water Restoration. Water 2022, 14, 2433. https://doi.org/10.3390/w14152433

AMA Style

He X, Zhao X, Zhang W, Ren B, Zhao Y. Developing a Novel Alum Sludge-Based Floating Treatment Wetland for Natural Water Restoration. Water. 2022; 14(15):2433. https://doi.org/10.3390/w14152433

Chicago/Turabian Style

He, Xinlong, Xiaohong Zhao, Wenshan Zhang, Baiming Ren, and Yaqian Zhao. 2022. "Developing a Novel Alum Sludge-Based Floating Treatment Wetland for Natural Water Restoration" Water 14, no. 15: 2433. https://doi.org/10.3390/w14152433

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