Environment friendly MOF-MoS2 composite for Cr(VI) and Pb(II) capture from paint industry wastewater: sequestration, regeneration and toxicity

Inorganica Chimica Acta, Journal Year: 2024, Volume and Issue: 570, P. 122165 - 122165

Published: May 26, 2024

Language: Английский

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Non-essential metal contamination in Ecuadorian agricultural production: A critical review

Journal of Food Composition and Analysis, Journal Year: 2022, Volume and Issue: 115, P. 104932 - 104932

Published: Sept. 24, 2022

Language: Английский

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Hexavalent Chromium Removal from Industrial Wastewater by Adsorption and Reduction onto Cationic Cellulose Nanocrystals

Nanomaterials, Journal Year: 2022, Volume and Issue: 12(23), P. 4172 - 4172

Published: Nov. 24, 2022

Cationic cellulose nanocrystals (CCNC) are lignocellulosic bio-nanomaterials that present large, specific areas rich with active surface cationic groups. This study shows the adsorption removal of hexavalent chromium (Cr(VI)) from industrial wastewaters by CCNC. The CCNC were synthetized through periodate oxidation and Girard's reagent-T cationization. high value CCNCs groups anionic demand reveal probable nanocrystal-Cr(VI) attraction. Adsorption was performed synthetic Cr(VI) water at different pH, dosage, concentration temperature. Fast found while operating pH 3 100 mg·L-1 dosage. Nevertheless, a first slower complete achieved lower dosage (40 mg·L-1). fully converted into less-toxic trivalent species, kept mainly attached to material surface. maximum capacity 44 mg·g-1. Two mechanisms for low concentrations (Pseudo-first pseudo-second kinetic models continuous growth multi-step intraparticle) (Elovich model sequential fast growth-plateau-slow intraparticle steps). Sips best-fitting isotherm. Isotherm thermodynamic analysis indicated dominant physical sorption. Arrhenius equation revealed an activation energy between chemical adsorption. application selected conditions in wastewater legal discharge limit 40 min.

Language: Английский

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Brassica juncea and the Se-hyperaccumulator Stanleya pinnata exhibit a different pattern of chromium and selenium accumulation and distribution while activating distinct oxidative stress-response signatures

Environmental Pollution, Journal Year: 2023, Volume and Issue: 320, P. 121048 - 121048

Published: Jan. 9, 2023

Soils high in chromium and selenium exist some countries, like China, India the US. In forms of chromate selenate, these elements can compete during uptake by plants lead to secondary effects on absorption essential nutrient sulfur. this study, we evaluated potential Brassica juncea Se-hyperaccumulator Stanleya pinnata take-up store when applied individually or jointly, effect sulfur content, plant antioxidant responses. The aim is advise best use species phytotechnologies. Plants were grown hydroponically with 50 μM chromate, selenate equimolar concentrations both (50 + selenate). Our results suggest that B. S. possess transport systems different affinity for selenate. joint application restricted accumulation elements, but reduction was more evident juncea. On other hand, decreased juncea, whereas such only roots. stored than due higher biomass produced, less treated elements. Chromate species, sensitive their toxicity individually, as revealed increased lipid peroxidation, hydrogen peroxide content roots enzyme activity. This still be efficient phytoextraction soil are available hydroponics. soils low selenium, preferred could used crop biofortification its negligible content.

Language: Английский

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Reducing Chromium Toxicity in Chinese Cabbage through Synergistic Effects of Silicon and Selenium: A Study of Plant Growth, Chromium Content, and Biochemical Parameters

Sustainability, Journal Year: 2023, Volume and Issue: 15(6), P. 5361 - 5361

Published: March 17, 2023

Silicon (Si) and selenium (Se) have been found to reduce chromium (Cr) toxicity in plants, which is important for crop production human health. However, there limited understanding of the interaction between Si Se mitigating Cr its mechanisms. This study investigated impact on Cr-treated Chinese cabbage growth, content, biochemical parameters a hydroponic experiment. The results showed that both effectively alleviate strong synergistic effect. They reduced content by 73.99% increased photosynthetic pigments 62.50% 47.51%, respectively. Antioxidant enzyme activity 28.20 21.37%, while non-enzyme antioxidants such as proline GSH decreased 27.44 28.51%. It was observed addition under stress resulted 29.58 134.37% increase soluble protein sugar, respectively, well improved nutrient contents (N, P, K, Ca, Mg). suggests can improve physiological ecology cabbage, reducing effects contributing global control heavy metal pollution food crops.

Language: Английский

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