The aim of the present study was to evaluate the performance of two pre-hydrolyzed aluminum coagulants (PAX-XL6 and PAX-XL8) in comparison with aluminum sulfate (alum) for surface water clarification. Jar-test experiments were conducted with coagulant doses ranging from 0 to 15 mg Al/L to determine the optimal dose. Results demonstrated that both the coagulant type and dosage strongly influenced clarification performance. The pre-hydrolyzed coagulants achieved the bests results, with maximum color removal efficiencies of 91.8% and turbidity removals of 89.3% (PAX-XL6) and 84.6% (PAX-XL8) at an optimal coagulant dose of 4 mg Al/L. In contrast, alum showed the lowest clarification performance, achieving maximum color removal of 87.5% and turbidity removal of 80.3%. At 4 mg Al/L, the pre-hydrolyzed coagulants met WHO drinking water guidelines for color and turbidity, whereas alum failed to meet color standard. Beyond 8 mg Al/L, all coagulants exhibited a decrease in clarification efficiency due to colloid restabilization. Regarding water chemistry, PAX-XL6 and PAX-XL8 induced only moderate reductions in pH and alkalinity, whereas alum caused significant acidification and a marked decrease in alkalinity. None of the coagulants affected water hardness. Overall, the pre-hydrolyzed coagulants demonstrated superior clarification performance and reduced chemical impact, confirming their potential as efficient and sustainable alternatives to alum for surface water treatment.
| Published in | American Journal of Environmental Protection (Volume 14, Issue 6) |
| DOI | 10.11648/j.ajep.20251406.15 |
| Page(s) | 305-311 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2025. Published by Science Publishing Group |
Pre-hydrolyzed Coagulants, Aluminum Sulfate (alum), Coagulation, Clarification, Color Removal, Turbidity Removal, Drinking Water, Surface Water Treatment
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APA Style
Seyhi, B., Sangare, K., Kouadio, G. K. (2025). A Comparative Study of Pre-hydrolysed Coagulants and Alum in Surface Water Clarification. American Journal of Environmental Protection, 14(6), 305-311. https://doi.org/10.11648/j.ajep.20251406.15
ACS Style
Seyhi, B.; Sangare, K.; Kouadio, G. K. A Comparative Study of Pre-hydrolysed Coagulants and Alum in Surface Water Clarification. Am. J. Environ. Prot. 2025, 14(6), 305-311. doi: 10.11648/j.ajep.20251406.15
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Download@article{10.11648/j.ajep.20251406.15,
author = {Brahima Seyhi and Kassoum Sangare and Georges Kouame Kouadio},
title = {A Comparative Study of Pre-hydrolysed Coagulants and Alum in Surface Water Clarification},
journal = {American Journal of Environmental Protection},
volume = {14},
number = {6},
pages = {305-311},
doi = {10.11648/j.ajep.20251406.15},
url = {https://doi.org/10.11648/j.ajep.20251406.15},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajep.20251406.15},
abstract = {The aim of the present study was to evaluate the performance of two pre-hydrolyzed aluminum coagulants (PAX-XL6 and PAX-XL8) in comparison with aluminum sulfate (alum) for surface water clarification. Jar-test experiments were conducted with coagulant doses ranging from 0 to 15 mg Al/L to determine the optimal dose. Results demonstrated that both the coagulant type and dosage strongly influenced clarification performance. The pre-hydrolyzed coagulants achieved the bests results, with maximum color removal efficiencies of 91.8% and turbidity removals of 89.3% (PAX-XL6) and 84.6% (PAX-XL8) at an optimal coagulant dose of 4 mg Al/L. In contrast, alum showed the lowest clarification performance, achieving maximum color removal of 87.5% and turbidity removal of 80.3%. At 4 mg Al/L, the pre-hydrolyzed coagulants met WHO drinking water guidelines for color and turbidity, whereas alum failed to meet color standard. Beyond 8 mg Al/L, all coagulants exhibited a decrease in clarification efficiency due to colloid restabilization. Regarding water chemistry, PAX-XL6 and PAX-XL8 induced only moderate reductions in pH and alkalinity, whereas alum caused significant acidification and a marked decrease in alkalinity. None of the coagulants affected water hardness. Overall, the pre-hydrolyzed coagulants demonstrated superior clarification performance and reduced chemical impact, confirming their potential as efficient and sustainable alternatives to alum for surface water treatment.},
year = {2025}
}
TY - JOUR T1 - A Comparative Study of Pre-hydrolysed Coagulants and Alum in Surface Water Clarification AU - Brahima Seyhi AU - Kassoum Sangare AU - Georges Kouame Kouadio Y1 - 2025/12/17 PY - 2025 N1 - https://doi.org/10.11648/j.ajep.20251406.15 DO - 10.11648/j.ajep.20251406.15 T2 - American Journal of Environmental Protection JF - American Journal of Environmental Protection JO - American Journal of Environmental Protection SP - 305 EP - 311 PB - Science Publishing Group SN - 2328-5699 UR - https://doi.org/10.11648/j.ajep.20251406.15 AB - The aim of the present study was to evaluate the performance of two pre-hydrolyzed aluminum coagulants (PAX-XL6 and PAX-XL8) in comparison with aluminum sulfate (alum) for surface water clarification. Jar-test experiments were conducted with coagulant doses ranging from 0 to 15 mg Al/L to determine the optimal dose. Results demonstrated that both the coagulant type and dosage strongly influenced clarification performance. The pre-hydrolyzed coagulants achieved the bests results, with maximum color removal efficiencies of 91.8% and turbidity removals of 89.3% (PAX-XL6) and 84.6% (PAX-XL8) at an optimal coagulant dose of 4 mg Al/L. In contrast, alum showed the lowest clarification performance, achieving maximum color removal of 87.5% and turbidity removal of 80.3%. At 4 mg Al/L, the pre-hydrolyzed coagulants met WHO drinking water guidelines for color and turbidity, whereas alum failed to meet color standard. Beyond 8 mg Al/L, all coagulants exhibited a decrease in clarification efficiency due to colloid restabilization. Regarding water chemistry, PAX-XL6 and PAX-XL8 induced only moderate reductions in pH and alkalinity, whereas alum caused significant acidification and a marked decrease in alkalinity. None of the coagulants affected water hardness. Overall, the pre-hydrolyzed coagulants demonstrated superior clarification performance and reduced chemical impact, confirming their potential as efficient and sustainable alternatives to alum for surface water treatment. VL - 14 IS - 6 ER -
Department of Geosciences, University Peleforo Gon Coulibaly, Korhogo, Côte d’Ivoire
Department of Sciences and Agro-Industrial technologies, University of San - Pedro, San - Pedro, Côte d’Ivoire
Department of Science and Technology, École Normale Supérieure, Abidjan, Côte d’Ivoire
