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Effect of the ORMOSIL Used for the Functionalization of MSNs in the Removal of Anionic Contaminants from Sugarcane Processing Wastewater.

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Title: Effect of the ORMOSIL Used for the Functionalization of MSNs in the Removal of Anionic Contaminants from Sugarcane Processing Wastewater.
Authors: Talavera-Pech, William A.1 (AUTHOR), Chan-Keb, Carlos A.2 (AUTHOR), Bacelis-Jiménez, Ángel A.3 (AUTHOR), Ruiz-Hernández, Judith2,4 (AUTHOR), Aguilar-Melo, Valentina1 (AUTHOR), Agraz-Hernández, Claudia M.2,4 (AUTHOR)
Source: Nanomaterials (2079-4991). Mar2026, Vol. 16 Issue 6, p368. 13p.
Subjects: Mesoporous silica, Environmental remediation, Sugar industry, Pollutants, Water purification, Physisorption, Organosilicon compounds, Surfaces (Technology)
Geographic Terms: Mexico
Abstract: Water pollution from the sugar industry is a significant environmental problem as it generates effluents containing organic compounds, solids, nutrients, and chemicals such as H3PO4, SO2, and Ca (OH)2. Mesoporous silica nanoparticles (MSNs) are a promising option for its treatment, due to their high surface area, and ease of functionalization using organically modified silanes (ORMOSIL) improving its adsorption of contaminants. The objective of this study is to remove anions (Cl−, SO42−, NO2−, NO3−) from the wastewater of a sugar mill in Campeche, Mexico and improve its physicochemical parameters (conductivity, turbidity, dissolved oxygen) using MSNs functionalized with 3-aminopropyltriethoxysilane (MSNs-APTES) or 3-(2-aminoethylamino)propyltrimethoxysilane (MSNs-3-2-A). The synthesized materials were characterized by FTIR and XPS analyses, which confirmed the incorporation of amino functional group and that MSNs-APTES exhibited a stronger N1s signal, indicating greater surface accessibility of amino groups. However, a partial surface masking under complex aqueous conditions was revealed. In contrast, MSNs-3-2-A showed lower apparent surface exposure of amino groups maintaining a more stable functional presence after exposure, likely due to its diamine structure promoting more confined interactions within the mesoporous framework. The results of removing anions and physicochemical parameters of wastewater exposed to MSNs indicate that treatments with MSNs-APTES and MSNs-3-2-A were able to significantly reduce the concentrations of SO42−, NO2− and NO3− anions, but not able to reduce the chloride ion. A decrease in turbidity and an increase in dissolved oxygen were also observed. Then, both materials proved to be functional and stable in contact with wastewater, demonstrating their potential for environmental remediation, particularly for the removal of anionic contaminants from sugar industry effluents. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Effect of the ORMOSIL Used for the Functionalization of MSNs in the Removal of Anionic Contaminants from Sugarcane Processing Wastewater.
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  Data: Water pollution from the sugar industry is a significant environmental problem as it generates effluents containing organic compounds, solids, nutrients, and chemicals such as H3PO4, SO2, and Ca (OH)2. Mesoporous silica nanoparticles (MSNs) are a promising option for its treatment, due to their high surface area, and ease of functionalization using organically modified silanes (ORMOSIL) improving its adsorption of contaminants. The objective of this study is to remove anions (Cl−, SO42−, NO2−, NO3−) from the wastewater of a sugar mill in Campeche, Mexico and improve its physicochemical parameters (conductivity, turbidity, dissolved oxygen) using MSNs functionalized with 3-aminopropyltriethoxysilane (MSNs-APTES) or 3-(2-aminoethylamino)propyltrimethoxysilane (MSNs-3-2-A). The synthesized materials were characterized by FTIR and XPS analyses, which confirmed the incorporation of amino functional group and that MSNs-APTES exhibited a stronger N1s signal, indicating greater surface accessibility of amino groups. However, a partial surface masking under complex aqueous conditions was revealed. In contrast, MSNs-3-2-A showed lower apparent surface exposure of amino groups maintaining a more stable functional presence after exposure, likely due to its diamine structure promoting more confined interactions within the mesoporous framework. The results of removing anions and physicochemical parameters of wastewater exposed to MSNs indicate that treatments with MSNs-APTES and MSNs-3-2-A were able to significantly reduce the concentrations of SO42−, NO2− and NO3− anions, but not able to reduce the chloride ion. A decrease in turbidity and an increase in dissolved oxygen were also observed. Then, both materials proved to be functional and stable in contact with wastewater, demonstrating their potential for environmental remediation, particularly for the removal of anionic contaminants from sugar industry effluents. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano16060368
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      – Code: eng
        Text: English
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        PageCount: 13
        StartPage: 368
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      – SubjectFull: Mesoporous silica
        Type: general
      – SubjectFull: Environmental remediation
        Type: general
      – SubjectFull: Sugar industry
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      – SubjectFull: Water purification
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      – SubjectFull: Organosilicon compounds
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      – TitleFull: Effect of the ORMOSIL Used for the Functionalization of MSNs in the Removal of Anionic Contaminants from Sugarcane Processing Wastewater.
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              Text: Mar2026
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