Efficient Analytical Pretreatment of Cr(VI) in Ethylene Wastewater by Grafting g-C<sub>3</sub>N<sub>4</sub> Material Based on Coupling Agent-Modified Basalt Matrix (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>)
This study presents a novel Basalt-based grafted graphitic carbon nitride composite (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) for the efficient pretreatment of Cr(VI) in ethylene wastewater. The composite was synthesized by the acid purification of natural Basalt, surface mo...
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MDPI AG
2025-06-01
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| author | Zheng Wang Mingchang Jia Yi Ren Hongmin Ren Shuhao Liang Jiaru Sun Siqi Hao Jinchuan Li He Li |
| author_facet | Zheng Wang Mingchang Jia Yi Ren Hongmin Ren Shuhao Liang Jiaru Sun Siqi Hao Jinchuan Li He Li |
| author_sort | Zheng Wang |
| collection | DOAJ |
| description | This study presents a novel Basalt-based grafted graphitic carbon nitride composite (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) for the efficient pretreatment of Cr(VI) in ethylene wastewater. The composite was synthesized by the acid purification of natural Basalt, surface modification with hydroxymethyl triethoxysilane (MTES), and the subsequent grafting of g-C<sub>3</sub>N<sub>4</sub>. Characterization confirmed the uniform distribution of nano-sized g-C<sub>3</sub>N<sub>4</sub> particles on a Basalt surface with intact chemical bonding, where 82.63% of melamine participated in g-C<sub>3</sub>N<sub>4</sub> crystallization. The material exhibited a high specific surface area (403.55 m<sup>2</sup>/g) and mesoporous structure (34.29 nm). Acidic conditions promoted the protonation of amino groups in g-C<sub>3</sub>N<sub>4</sub>, significantly enhancing Cr(VI) adsorption via ion exchange. Adsorption kinetics followed the pseudo-second-order model, while isotherm data fitted the Langmuir monolayer adsorption mechanism. The composite achieved 97% Cr(VI) recovery through chromatographic extraction and retained 96.87% removal efficiency after five regeneration cycles. This work demonstrates a cost-effective, recyclable green pretreatment material for high-sensitivity Cr(VI) monitoring in ethylene industry wastewater, offering dual benefits in environmental remediation and regulatory compliance. The design synergizes natural Basalt’s stability with g-C<sub>3</sub>N<sub>4</sub>’s adsorption affinity, showing practical potential for sustainable wastewater treatment technologies. |
| format | Article |
| id | doaj-art-eeff5be3a2ec4a708d3f510693573238 |
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| issn | 1420-3049 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Molecules |
| spelling | doaj-art-eeff5be3a2ec4a708d3f5106935732382025-08-20T02:32:56ZengMDPI AGMolecules1420-30492025-06-013011247710.3390/molecules30112477Efficient Analytical Pretreatment of Cr(VI) in Ethylene Wastewater by Grafting g-C<sub>3</sub>N<sub>4</sub> Material Based on Coupling Agent-Modified Basalt Matrix (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>)Zheng Wang0Mingchang Jia1Yi Ren2Hongmin Ren3Shuhao Liang4Jiaru Sun5Siqi Hao6Jinchuan Li7He Li8Department of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaDepartment of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaDepartment of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaDepartment of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaDepartment of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaDepartment of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaDepartment of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaDepartment of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaDepartment of Chemical Engineering, Hebei Petroleum University of Technology, Chengde 067000, ChinaThis study presents a novel Basalt-based grafted graphitic carbon nitride composite (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) for the efficient pretreatment of Cr(VI) in ethylene wastewater. The composite was synthesized by the acid purification of natural Basalt, surface modification with hydroxymethyl triethoxysilane (MTES), and the subsequent grafting of g-C<sub>3</sub>N<sub>4</sub>. Characterization confirmed the uniform distribution of nano-sized g-C<sub>3</sub>N<sub>4</sub> particles on a Basalt surface with intact chemical bonding, where 82.63% of melamine participated in g-C<sub>3</sub>N<sub>4</sub> crystallization. The material exhibited a high specific surface area (403.55 m<sup>2</sup>/g) and mesoporous structure (34.29 nm). Acidic conditions promoted the protonation of amino groups in g-C<sub>3</sub>N<sub>4</sub>, significantly enhancing Cr(VI) adsorption via ion exchange. Adsorption kinetics followed the pseudo-second-order model, while isotherm data fitted the Langmuir monolayer adsorption mechanism. The composite achieved 97% Cr(VI) recovery through chromatographic extraction and retained 96.87% removal efficiency after five regeneration cycles. This work demonstrates a cost-effective, recyclable green pretreatment material for high-sensitivity Cr(VI) monitoring in ethylene industry wastewater, offering dual benefits in environmental remediation and regulatory compliance. The design synergizes natural Basalt’s stability with g-C<sub>3</sub>N<sub>4</sub>’s adsorption affinity, showing practical potential for sustainable wastewater treatment technologies.https://www.mdpi.com/1420-3049/30/11/2477basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>Cr(VI)ethylene wastewateranalytical pretreatmention exchange |
| spellingShingle | Zheng Wang Mingchang Jia Yi Ren Hongmin Ren Shuhao Liang Jiaru Sun Siqi Hao Jinchuan Li He Li Efficient Analytical Pretreatment of Cr(VI) in Ethylene Wastewater by Grafting g-C<sub>3</sub>N<sub>4</sub> Material Based on Coupling Agent-Modified Basalt Matrix (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) Molecules basalt–MTES/g-C<sub>3</sub>N<sub>4</sub> Cr(VI) ethylene wastewater analytical pretreatment ion exchange |
| title | Efficient Analytical Pretreatment of Cr(VI) in Ethylene Wastewater by Grafting g-C<sub>3</sub>N<sub>4</sub> Material Based on Coupling Agent-Modified Basalt Matrix (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) |
| title_full | Efficient Analytical Pretreatment of Cr(VI) in Ethylene Wastewater by Grafting g-C<sub>3</sub>N<sub>4</sub> Material Based on Coupling Agent-Modified Basalt Matrix (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) |
| title_fullStr | Efficient Analytical Pretreatment of Cr(VI) in Ethylene Wastewater by Grafting g-C<sub>3</sub>N<sub>4</sub> Material Based on Coupling Agent-Modified Basalt Matrix (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) |
| title_full_unstemmed | Efficient Analytical Pretreatment of Cr(VI) in Ethylene Wastewater by Grafting g-C<sub>3</sub>N<sub>4</sub> Material Based on Coupling Agent-Modified Basalt Matrix (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) |
| title_short | Efficient Analytical Pretreatment of Cr(VI) in Ethylene Wastewater by Grafting g-C<sub>3</sub>N<sub>4</sub> Material Based on Coupling Agent-Modified Basalt Matrix (Basalt–MTES/g-C<sub>3</sub>N<sub>4</sub>) |
| title_sort | efficient analytical pretreatment of cr vi in ethylene wastewater by grafting g c sub 3 sub n sub 4 sub material based on coupling agent modified basalt matrix basalt mtes g c sub 3 sub n sub 4 sub |
| topic | basalt–MTES/g-C<sub>3</sub>N<sub>4</sub> Cr(VI) ethylene wastewater analytical pretreatment ion exchange |
| url | https://www.mdpi.com/1420-3049/30/11/2477 |
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