The modification of biomass waste by cerium-based MOFs for efficient phosphate removal: excellent performance and reaction mechanism
Due to the possibility of causing eutrophication, excessive phosphate discharged into water bodies always threatens the stabilization of aquatic ecosystem. A promising strategy is to remove phosphate from water by the utilization of biomass waste as adsorbents. In this paper, the corn straw (CS) and...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-11-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/86/9/2415 |
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| author | Jiaojie He Yixing Yang Min Qu Yue Yang Liwei Yang |
| author_facet | Jiaojie He Yixing Yang Min Qu Yue Yang Liwei Yang |
| author_sort | Jiaojie He |
| collection | DOAJ |
| description | Due to the possibility of causing eutrophication, excessive phosphate discharged into water bodies always threatens the stabilization of aquatic ecosystem. A promising strategy is to remove phosphate from water by the utilization of biomass waste as adsorbents. In this paper, the corn straw (CS) and pine sawdust (PS) are chosen for adsorption; however, the phosphate removal capacities of them are very limited. Considering the high phosphate uptake of trivalent cerium, Ce (III)-based nanoparticles (CD and CT) are selected to be loaded on the biomass by hydrothermal synthesis to obtain four modified materials. CD is metal organic frameworks (MOFs) with Ce5(BDC)7.5(DMF)4 as its molecular structure, while CT is MOFs derivatives with [Ce (HCOO)]n as its crystal structure. The adsorption capacities of CS-CD, PS-CD, CS-CT and PS-CT reach 181.38, 183.27, 225.55 and 186.23 mg/g. But on account of the different molecular structures, CS-CD and PS-CD achieve great phosphate uptake under wide applicable scope of pH from 2 to 11, whereas CS-CT and PS-CT only under acidic conditions. The analysis of the adsorption mechanism indicates that due to the unsaturated coordination bond of CD, it could remove phosphate through coprecipitation and ion exchange even under alkaline conditions.
HIGHLIGHTS
The modified biomass wastes by cerium-based nanoparticles were developed to enhance their phosphate removal.;
The CD and CT are all dominated by trivalent cerium.;
Different from CD, CT is a MOF derivative, with cerium atom nine fold coordinated.;
CS-CT showed high adsorption capacity of 225.55 mg/g.;
CS-CD and PS-CD exhibited higher phosphate capacities in a wide pH range due to their unsaturated coordination.; |
| first_indexed | 2024-04-11T16:20:53Z |
| format | Article |
| id | doaj.art-5637c97cb0474e5e96f5e15edb2482cb |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-04-11T16:20:53Z |
| publishDate | 2022-11-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-5637c97cb0474e5e96f5e15edb2482cb2022-12-22T04:14:20ZengIWA PublishingWater Science and Technology0273-12231996-97322022-11-018692415242910.2166/wst.2022.331331The modification of biomass waste by cerium-based MOFs for efficient phosphate removal: excellent performance and reaction mechanismJiaojie He0Yixing Yang1Min Qu2Yue Yang3Liwei Yang4 School of Civil Engineering, Chang'an University, Xi'an 710061, China School of Civil Engineering, Chang'an University, Xi'an 710061, China School of Civil Engineering, Chang'an University, Xi'an 710061, China School of Civil Engineering, Chang'an University, Xi'an 710061, China School of Civil Engineering, Chang'an University, Xi'an 710061, China Due to the possibility of causing eutrophication, excessive phosphate discharged into water bodies always threatens the stabilization of aquatic ecosystem. A promising strategy is to remove phosphate from water by the utilization of biomass waste as adsorbents. In this paper, the corn straw (CS) and pine sawdust (PS) are chosen for adsorption; however, the phosphate removal capacities of them are very limited. Considering the high phosphate uptake of trivalent cerium, Ce (III)-based nanoparticles (CD and CT) are selected to be loaded on the biomass by hydrothermal synthesis to obtain four modified materials. CD is metal organic frameworks (MOFs) with Ce5(BDC)7.5(DMF)4 as its molecular structure, while CT is MOFs derivatives with [Ce (HCOO)]n as its crystal structure. The adsorption capacities of CS-CD, PS-CD, CS-CT and PS-CT reach 181.38, 183.27, 225.55 and 186.23 mg/g. But on account of the different molecular structures, CS-CD and PS-CD achieve great phosphate uptake under wide applicable scope of pH from 2 to 11, whereas CS-CT and PS-CT only under acidic conditions. The analysis of the adsorption mechanism indicates that due to the unsaturated coordination bond of CD, it could remove phosphate through coprecipitation and ion exchange even under alkaline conditions. HIGHLIGHTS The modified biomass wastes by cerium-based nanoparticles were developed to enhance their phosphate removal.; The CD and CT are all dominated by trivalent cerium.; Different from CD, CT is a MOF derivative, with cerium atom nine fold coordinated.; CS-CT showed high adsorption capacity of 225.55 mg/g.; CS-CD and PS-CD exhibited higher phosphate capacities in a wide pH range due to their unsaturated coordination.;http://wst.iwaponline.com/content/86/9/2415adsorptionbiomass wastecerium-based nanoparticlesphosphate |
| spellingShingle | Jiaojie He Yixing Yang Min Qu Yue Yang Liwei Yang The modification of biomass waste by cerium-based MOFs for efficient phosphate removal: excellent performance and reaction mechanism Water Science and Technology adsorption biomass waste cerium-based nanoparticles phosphate |
| title | The modification of biomass waste by cerium-based MOFs for efficient phosphate removal: excellent performance and reaction mechanism |
| title_full | The modification of biomass waste by cerium-based MOFs for efficient phosphate removal: excellent performance and reaction mechanism |
| title_fullStr | The modification of biomass waste by cerium-based MOFs for efficient phosphate removal: excellent performance and reaction mechanism |
| title_full_unstemmed | The modification of biomass waste by cerium-based MOFs for efficient phosphate removal: excellent performance and reaction mechanism |
| title_short | The modification of biomass waste by cerium-based MOFs for efficient phosphate removal: excellent performance and reaction mechanism |
| title_sort | modification of biomass waste by cerium based mofs for efficient phosphate removal excellent performance and reaction mechanism |
| topic | adsorption biomass waste cerium-based nanoparticles phosphate |
| url | http://wst.iwaponline.com/content/86/9/2415 |
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