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Impacts of Calcium Addition on Humic Acid Fouling and the Related Mechanism in Ultrafiltration Process for Water Treatment
Humic acid (HA) is a major natural organic pollutant widely coexisting with calcium ions (Ca(2+)) in natural water and wastewater bodies, and the coagulation–ultrafiltration process is the most typical solution for surface water treatment. However, little is known about the influences of Ca(2+) on H...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9692280/ https://www.ncbi.nlm.nih.gov/pubmed/36363588 http://dx.doi.org/10.3390/membranes12111033 |
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author | Zou, Hui Long, Ying Shen, Liguo He, Yiming Zhang, Meijia Lin, Hongjun |
author_facet | Zou, Hui Long, Ying Shen, Liguo He, Yiming Zhang, Meijia Lin, Hongjun |
author_sort | Zou, Hui |
collection | PubMed |
description | Humic acid (HA) is a major natural organic pollutant widely coexisting with calcium ions (Ca(2+)) in natural water and wastewater bodies, and the coagulation–ultrafiltration process is the most typical solution for surface water treatment. However, little is known about the influences of Ca(2+) on HA fouling in the ultrafiltration process. This study explored the roles of Ca(2+) addition in HA fouling and the potential of Ca(2+) addition for fouling mitigation in the coagulation-ultrafiltration process. It was found that the filtration flux of HA solution rose when Ca(2+) concentration increased from 0 to 5.0 mM, corresponding to the reduction of the hydraulic filtration resistance. However, the proportion and contribution of each resistance component in the total hydraulic filtration resistance have different variation trends with Ca(2+) concentration. An increase in Ca(2+) addition (0 to 5.0 mM) weakened the role of internal blocking resistance (9.02% to 4.81%) and concentration polarization resistance (50.73% to 32.17%) in the total hydraulic resistance but enhanced membrane surface deposit resistance (33.93% to 44.32%). A series of characterizations and thermodynamic analyses consistently suggest that the enlarged particle size caused by the Ca(2+) bridging effect was the main reason for the decreased filtration resistance of the HA solution. This work revealed the impacts of Ca(2+) on HA fouling and demonstrated the feasibility to mitigate fouling by adding Ca(2+) in the ultrafiltration process to treat HA pollutants. |
format | Online Article Text |
id | pubmed-9692280 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96922802022-11-26 Impacts of Calcium Addition on Humic Acid Fouling and the Related Mechanism in Ultrafiltration Process for Water Treatment Zou, Hui Long, Ying Shen, Liguo He, Yiming Zhang, Meijia Lin, Hongjun Membranes (Basel) Article Humic acid (HA) is a major natural organic pollutant widely coexisting with calcium ions (Ca(2+)) in natural water and wastewater bodies, and the coagulation–ultrafiltration process is the most typical solution for surface water treatment. However, little is known about the influences of Ca(2+) on HA fouling in the ultrafiltration process. This study explored the roles of Ca(2+) addition in HA fouling and the potential of Ca(2+) addition for fouling mitigation in the coagulation-ultrafiltration process. It was found that the filtration flux of HA solution rose when Ca(2+) concentration increased from 0 to 5.0 mM, corresponding to the reduction of the hydraulic filtration resistance. However, the proportion and contribution of each resistance component in the total hydraulic filtration resistance have different variation trends with Ca(2+) concentration. An increase in Ca(2+) addition (0 to 5.0 mM) weakened the role of internal blocking resistance (9.02% to 4.81%) and concentration polarization resistance (50.73% to 32.17%) in the total hydraulic resistance but enhanced membrane surface deposit resistance (33.93% to 44.32%). A series of characterizations and thermodynamic analyses consistently suggest that the enlarged particle size caused by the Ca(2+) bridging effect was the main reason for the decreased filtration resistance of the HA solution. This work revealed the impacts of Ca(2+) on HA fouling and demonstrated the feasibility to mitigate fouling by adding Ca(2+) in the ultrafiltration process to treat HA pollutants. MDPI 2022-10-23 /pmc/articles/PMC9692280/ /pubmed/36363588 http://dx.doi.org/10.3390/membranes12111033 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zou, Hui Long, Ying Shen, Liguo He, Yiming Zhang, Meijia Lin, Hongjun Impacts of Calcium Addition on Humic Acid Fouling and the Related Mechanism in Ultrafiltration Process for Water Treatment |
title | Impacts of Calcium Addition on Humic Acid Fouling and the Related Mechanism in Ultrafiltration Process for Water Treatment |
title_full | Impacts of Calcium Addition on Humic Acid Fouling and the Related Mechanism in Ultrafiltration Process for Water Treatment |
title_fullStr | Impacts of Calcium Addition on Humic Acid Fouling and the Related Mechanism in Ultrafiltration Process for Water Treatment |
title_full_unstemmed | Impacts of Calcium Addition on Humic Acid Fouling and the Related Mechanism in Ultrafiltration Process for Water Treatment |
title_short | Impacts of Calcium Addition on Humic Acid Fouling and the Related Mechanism in Ultrafiltration Process for Water Treatment |
title_sort | impacts of calcium addition on humic acid fouling and the related mechanism in ultrafiltration process for water treatment |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9692280/ https://www.ncbi.nlm.nih.gov/pubmed/36363588 http://dx.doi.org/10.3390/membranes12111033 |
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