Enhanced removal of ammonia nitrogen from rare earth wastewater by NaCl modified vermiculite: Performance and mechanism

Ren, Shigang; Huang, Shaoyong; Liu, Baixiong

doi:10.1016/j.chemosphere.2022.134742

Cited by 19 publications

(2 citation statements)

References 64 publications

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“…The porous ceramsite was acid-modified with a large number of active adsorption sites distributed on the surface and pores, followed by sodium citrate modification to load a large amount of Na + . Part of the ammonia nitrogen in the solution enters the adsorption sites on the porous ceramsite due to electrostatic attraction [23], and the other part is replaced with Na + through ion exchange [24], which ultimately achieves the purpose of removing ammonia nitrogen in the solution.…”

Section: Mechanism Of Ammonia Nitrogen Adsorption By Porous Ceramsitementioning

confidence: 99%

Preparation of porous ceramsite from municipal sludge and its structure characteristics

Meng,

Cui,

Srinivasakannan

et al. 2023

Advances in Applied Ceramics: Structural, Functional and Biocer

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In this paper, the municipal sludge was used as the main raw material to prepare a kind of porous ceramsite. The porous ceramsite composition of 50 wt-% of municipal sludge, 10 wt-% of municipal solid waste incineration bottom ash, 45 wt-% of waste glass powders, sintering temperature of 900°C and holding duration of 30 min. The best of the ceramsite synthesised had 1-h water absorption capacity of 51.53%, apparent porosity of 64.14% and pore volume 0.671 mL g −1 . During the sintering process, the waste glass powders generated a large amount of liquid phase, wrapt the gas produced by organic matter, and formed a porous structure inside the ceramic particles. At the same time, the silica and aluminium were combined to form Kyanite, which constitutes the basic skeleton of the ceramic particles showing a certain strength. Besides, silicon oxide and calcium silicate generated Wollastonite improving the corrosion resistance of ceramic particles as well. The adsorption capacity of the prepared porous ceramsite modified by acid combined with sodium citrate was 3.1 mg g −1 using the prepared porous ceramsite as substrate. The adsorption kinetics of ammonia nitrogen by porous ceramics conforms to the quasi-second-order kinetic model, and the adsorption isotherm model conforms to the Langmuir model. The findings lay a theoretical foundation for the integration of resource utilisation of solid waste and later application.

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Section: Mechanism Of Ammonia Nitrogen Adsorption By Porous Ceramsitementioning

confidence: 99%

Preparation of porous ceramsite from municipal sludge and its structure characteristics

Meng,

Cui,

Srinivasakannan

et al. 2023

Advances in Applied Ceramics: Structural, Functional and Biocer

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“…EVMT is a mica-type silicate with exchangeable cations and active -OH groups on the surface. It is a widely used, cost-efficient adsorbent due to its layered crystalline structure, porous structure, hydrophilicity and high surface charge density [ 34 , 35 ]. According to some reported works, other materials such as MOF and graphene can be also used as adsorbents, but the production costs of these materials are very high [ 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

An Eco-Friendly Adsorbent Based on Bacterial Cellulose and Vermiculite Composite for Efficient Removal of Methylene Blue and Sulfanilamide

Bai

Liu

et al. 2023

Polymers

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In this work, a novel composite of bacterial cellulose (BC) and expanded vermiculite (EVMT) composite was used to adsorb dyes and antibiotics. The pure BC and BC/EVMT composite were characterized using SEM, FTIR, XRD, XPS and TGA. The BC/EVMT composite exhibited a microporous structure, providing abundant adsorption sites for target pollutants. The adsorption performance of the BC/EVMT composite was investigated for the removal of methylene blue (MB) and sulfanilamide (SA) from an aqueous solution. The adsorption capacity of BC/ENVMT for MB increased with increasing pH, while the adsorption capacity for SA decreased with increasing pH. The equilibrium data were analyzed using the Langmuir and Freundlich isotherms. As a result, the adsorption of MB and SA by the BC/EVMT composite was found to follow the Langmuir isotherm well, indicating a monolayer adsorption process on a homogeneous surface. The maximum adsorption capacity of the BC/EVMT composite was found to be 92.16 mg/g for MB and 71.53 mg/g for SA, respectively. The adsorption kinetics of both MB and SA on the BC/EVMT composite showed significant characteristics of a pseudo-second-order model. Considering the low cost and high efficiency of BC/EVMT, it is expected to be a promising adsorbent for the removal of dyes and antibiotics from wastewater. Thus, it can serve as a valuable tool in sewage treatment to improve water quality and reduce environmental pollution.

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Natural Vermiculite Slice Modified by CTAB and Zirconium for Selective Adsorption of Phosphate

Zeng,

Zou,

Feng

et al. 2023

Water Air Soil Pollut

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Enhanced removal of ammonia nitrogen from rare earth wastewater by NaCl modified vermiculite: Performance and mechanism

Cited by 19 publications

References 64 publications

Preparation of porous ceramsite from municipal sludge and its structure characteristics

Preparation of porous ceramsite from municipal sludge and its structure characteristics

An Eco-Friendly Adsorbent Based on Bacterial Cellulose and Vermiculite Composite for Efficient Removal of Methylene Blue and Sulfanilamide

Natural Vermiculite Slice Modified by CTAB and Zirconium for Selective Adsorption of Phosphate

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