The migration process and temperature effect of aqueous solutions contaminated by heavy metal ions in unsaturated silty soils

Heliyon, Год журнала: 2024, Номер 10(9), С. e30458 - e30458

Опубликована: Апрель 27, 2024

Adsorption-desorption experiments of three heavy metal ions (i.e., lead, copper, cadmium) in silty soil were carried out at different temperatures, and the microscopic characteristics loaded with analyzed. A one-dimensional column was used to discuss influences ion types concentrations on moisture distribution migration level ions, especially during dynamic change process from an unsaturated state a saturated state. Studies show that adsorption onto is closely related mineral composition functional groups soil. In addition physical adsorption, hydrolysis reaction components such as kaolinite, calcite, dolomite, plagioclase quartz. Under constant temperature, play important role presence penetration lead greatest, followed by copper then cadmium ions. The greater concentration is, stronger soils.

Язык: Английский

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Optimizing methylene blue adsorption conditions on hydrothermally synthesized NaX zeolite through a full two-level factorial design

RSC Advances, Год журнала: 2024, Номер 14(33), С. 23816 - 23827

Опубликована: Янв. 1, 2024

Besides being hazardous to humans and aquatic organisms, dyes present in water reservoirs limit sunlight's availability plants animals, making significant impact on their growth development.

Язык: Английский

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Phytoremediation of metals in oil sands process affected water by native wetland species

Ecotoxicology and Environmental Safety, Год журнала: 2024, Номер 282, С. 116732 - 116732

Опубликована: Июль 16, 2024

Process affected water and other industrial wastewaters are a major environmental concern. During oil sands mining, large amounts of process (OSPW) generated stored in ponds until reclaimed ready for surface discharge. While much research has focused on organics waters, trace metals at high concentrations may also pose risks. Phytoremediation is cost effective sustainable approach that employs plants to extract reduce contaminants water. The was undertaken mesocosm scale constructed wetlands with exposed OSPW 60 days. objective screen seven native emergent wetland species their ability tolerate metal (arsenic, cadmium, copper, chromium, nickel, selenium, zinc), then evaluate the best performing phytoremediation. All plant species, except Glyceria grandis, tolerated grew OSPW. Carex aquatilis (water sedge), Juncus balticus (baltic rush), Typha latifolia (cattail) had highest survival growth, removal efficiencies arsenic (81-87 %), chromium (78-86 cadmium (74-84 relative metals; greater than 91 % dissolved portions were removed. efficient accumulators all metals, as demonstrated by root shoot bioaccumulation factors; accumulation accumulation. Translocation factor values one (chromium, zinc) (cadmium, cobalt, nickel). results demonstrate potential suitability these phytoremediation number concern could provide an environmentally sound remediation wastewaters.

Язык: Английский

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Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media

Gels, Год журнала: 2025, Номер 11(1), С. 24 - 24

Опубликована: Янв. 1, 2025

Composite adsorbents based on a natural biopolymer matrix of chitosan, to which 4-amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide and its Se derivative were attached, synthesized. A complex physicochemical analysis methods indicates that the direct introduction with high ionic permeability into reaction mixture contributes formation homogeneous particles composite developed surface morphology, enhances kinetic capacitive parameters uranium sorption in liquid media. It has been established The synthesized materials had increased sorption-selective properties towards pH range from 4 9 under static conditions. amidoxime during attachment polymer (Se-chit) creation more chemically stable highly effective adsorbent, compared binding chitosan (43AF-chit). optimal for synthesis established. was demonstrated ratio should be within 2:1 1:2. As mass content increases, material gradually dissolves transforms gel, resulting radioactive waste chemical composition. found increase 2–10 times those non-composite materials. capacity solutions 6 8 can reach approximately 400–450 mg g−1. Under dynamic conditions, filtration cycle values (before slips filtrate ≥ 50%) improve significantly when transitioning adsorbent one: increasing 50 800 b.v. 2700 4000 8. These results indicate sorbents are promising removal media, suitable both purification recovery radionuclides as valuable raw

Язык: Английский

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Ca2 + substitution synergises zeolite physisorption accelerated Na+ substitution to improve saline soils

Soil and Tillage Research, Год журнала: 2025, Номер 248, С. 106461 - 106461

Опубликована: Янв. 18, 2025

Язык: Английский

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Harnessing the potential of zeolites for effective fluoride removal from wastewater: a review

Environmental Science and Pollution Research, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Язык: Английский

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Scalable wastewater treatment: Performance of zeolite and bentonite in a fixed-bed reactor for textile effluents

Journal of Water Process Engineering, Год журнала: 2025, Номер 71, С. 107349 - 107349

Опубликована: Март 1, 2025

Язык: Английский

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Global Advances and Innovations in Bacteria-Based Biosorption for Heavy Metal Remediation: A Bibliometric and Analytical Perspective

Integrated Environmental Assessment and Management, Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 2025

Abstract Industrialization and urbanization have significantly escalated the discharge of heavy metals into aquatic environments, posing serious ecological public health risks. This study explores global research landscape bacterial biosorption for metal removal, emphasizing advancements in methodologies technologies that redefined this field. A bibliometric analysis 298 publications (1987–2024) was conducted to identify key trends, collaboration networks, innovations. Notable include integration nanotechnology, which has enhanced adsorption efficiency selectivity specific metals, genetic engineering approaches optimize strains higher capacity. Furthermore, these developments transformed traditional remediation strategies by providing cost-effective, sustainable, scalable solutions industries such as textiles, mining, energy production. underscores practical relevance wastewater treatment, achieving removal efficiencies exceeding 99% some cases, demonstrated Aspergillus versicolor Shewanella oneidensis MR-1. By bridging scientific innovation with environmental sustainability, highlights a pivotal green technology, offering actionable insights industrial applications sustainability goals.

Язык: Английский

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Photocatalytic Degradation of Rhodamine B Over Clinoptilolite Modified with Transition Metals

Journal of Cluster Science, Год журнала: 2025, Номер 36(2)

Опубликована: Фев. 2, 2025

Язык: Английский

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Coal Fly Ash and Acid Mine Drainage-Based Fe-BEA Catalysts for the Friedel–Crafts Alkylation of Benzene

Catalysts, Год журнала: 2025, Номер 15(2), С. 155 - 155

Опубликована: Фев. 7, 2025

Coal fly ash and acid mine drainage are significant environmental issues in South Africa, causing storage constraints impacting water quality. This study explores the use of coal preparing zeolite HBEA-supported Fe catalysts. The Na-BEA parent catalysts were synthesised hydrothermally using as a feedstock. was loaded upon H-BEA form liquid-phase ion exchange or wet impregnation, Fe-rich metal precursor. ion-exchanged Fe-BEA exhibited excellent activity, with highest selectivity achieved over 25 AHW after 0.5 h on stream. also found that when impregnation used to load onto support, other metals present AMD affected overall Mn, Ca, Mg, Na decreasing conversion selectivity, while Ni had promoting effect. demonstrates green solid high catalytic activity can be prepared two waste materials, drainage. To best our knowledge, we reporting for first time precursor catalyst preparation.

Язык: Английский

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