Water hyacinth derived biochar for polycyclic aromatic hydrocarbons removal and oxidative stress study

Environmental Technology & Innovation, Год журнала: 2023, Номер 29, С. 103027 - 103027

Опубликована: Янв. 20, 2023

Polycyclic aromatic hydrocarbons (PAHs), highly concerned emerging contaminant, are priority persistent organic pollutants (POPs) adversely affect the ecological health of marine sediments. These have attracted widespread attention because their potential toxicological effects on aquatic organisms and subsequent threats to human health. In this study, an advanced oxidation process for remediation PAH-contaminated sediments was developed by activation calcium peroxide (CaO2; CP) using a green catalyst prepared from water hyacinth biochar (WHBC), associated biochar-driven cellular oxidative stress highlighted. The catalytic capacity WHBC determined at pyrolysis temperature between 300 900 °C. 700 °C (WHBC700) CP removed 74% PAHs sediment matrix. Results antioxidant activity evaluation after exposure doses 400–4000 1000–4000 mg L−1 in hepatocarcinoma cell lines (HepG2) 24 h showed enhanced glutathione peroxidase (GPx) catalase (CAT) activities, respectively. Increase mRNA levels superoxide dismutase (SOD) genes also observed (400–4000 L−1), implying that damage caused reactive oxygen species (ROS) inhibited elevating activity. This study attempted demonstrate effective waste-to-resource strategy remediating PAH-polluted addition understanding environmental gene expression carbon-based catalysts HepG2.

Язык: Английский

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Nitrogen and boron co-doped lignin biochar for enhancing calcium peroxide activation toward organic micropollutants decontamination in waste activated sludge and related microbial structure dynamics

Bioresource Technology, Год журнала: 2023, Номер 372, С. 128673 - 128673

Опубликована: Янв. 23, 2023

Язык: Английский

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The Progress and Prospect of calcium peroxide nanoparticles in antibacterial activity

Colloids and Interface Science Communications, Год журнала: 2024, Номер 61, С. 100793 - 100793

Опубликована: Июль 1, 2024

This review provides a comprehensive overview of the advancements and potential applications calcium peroxide nanoparticles (CaO2 NPs) in combating bacterial infections. With rise antibiotic resistance posing significant global health threat, alternative antibacterial agents like CaO2 NPs have garnered increasing attention. The begins by discussing synthesis functionalization NPs, highlighting recent developments nanoparticle engineering techniques. Subsequently, it explores intricate mechanisms emphasizing their ability to generate reactive oxygen species disrupt biofilms. Evaluation NPs' efficacy against broad spectrum pathogens, coupled with discussions on various fields including biomedical environmental remediation, underscores promising role as effective agents. also addresses challenges such stability biocompatibility, proposes future research directions fully exploit therapeutic NPs. Overall, this consolidates current knowledge advocates for continued exploration

Язык: Английский

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Efficient Adsorption of Tebuconazole in Aqueous Solution by Calcium Modified Water Hyacinth-Based Biochar: Adsorption Kinetics, Mechanism, and Feasibility

Molecules, Год журнала: 2023, Номер 28(8), С. 3478 - 3478

Опубликована: Апрель 14, 2023

The application of fungicides (such as tebuconazole) can impose harmful impacts on the ecosystem and humans. In this study, a new calcium modified water hyacinth-based biochar (WHCBC) was prepared its effectiveness for removing tebuconazole (TE) via adsorption from tested. results showed that Ca loaded chemically (CaC2O4) onto surface WHCBC. capacity increased by 2.5 times in comparison to unmodified hyacinth biochar. enhanced attributed improved chemical through modification. data were better fitted pseudo-second-order kinetics Langmuir isotherm model, indicating process dominated monolayer adsorption. It found liquid film diffusion main rate-limiting step process. maximum WHCBC 40.5 mg/g TE. indicate absorption mechanisms involved complexation, hydrogen bonding, π-π interactions. inhibitory rate Cu2+ Ca2+ TE at 4.05-22.8%. contrast, presence other coexisting cations (Cr6+, K+, Mg2+, Pb2+), well natural organic matter (humic acid), could promote 4.45-20.9%. addition, regeneration able reach up 83.3% after five cycles desorption stirring with 0.2 mol/L HCl (t = 360 min). suggest has potential water.

Язык: Английский

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The effects and mechanism of organic matter degradation in river sediment driven by humic-reducing bacteria

Journal of Water Process Engineering, Год журнала: 2024, Номер 67, С. 106150 - 106150

Опубликована: Сен. 12, 2024

Язык: Английский

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Optimized Degradation of Doxycycline in Aqueous Systems Using Calcium Peroxide Nanoparticles via Response Surface Methodology

ACS Omega, Год журнала: 2025, Номер 10(10), С. 10205 - 10219

Опубликована: Март 7, 2025

The presence of antibiotic residues in aqueous systems, particularly doxycycline (DOX), is harmful to the environment and public health. In this study, dextran-coated calcium peroxide nanoparticles (DEX@nCPs(DEX)), Fe(II), oxalic acid (OA) were combined improve heterogeneous Fenton-like degradation DOX. X-ray photoelectron spectroscopy (XPS) demonstrated successful synthesis DEX@nCPs(DEX), showing Ca, O, C functional groups associated with dextran. Using response surface methodology a central composite design (RSM-CCD), optimal conditions (DEX@nCPs(DEX) dosage: 2 g/L, pH: 5, contact time: 420 min) achieved 90% DOX removal, which was 20% higher than using DEX@nCPs(DEX)/Fe(II) alone. process followed first-order kinetics rate constant k 1 = 0.0047 min-1. Model validation showed high predictive accuracy (R 0.996; adjusted R 0.987). Scavenger photoluminescence analyses revealed hydroxyl radicals (•OH) be primary reactive species, accounting for over 80% activity. DEX@nCPs(DEX)/Fe(II)/OA system offers promising approach mitigating pharmaceutical pollutants water, contributing more sustainable environmental management practices.

Язык: Английский

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The remediation of di-(2-ethylhexyl) phthalate-contaminated sediments by water hyacinth biochar activation of calcium peroxide and its effect on cytotoxicity

Environmental Research, Год журнала: 2022, Номер 216, С. 114656 - 114656

Опубликована: Окт. 30, 2022

Язык: Английский

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Synthesis of Calcium Peroxide Nanoparticles with Starch as a Stabilizer for the Degradation of Organic Dye in an Aqueous Solution

Polymers, Год журнала: 2023, Номер 15(5), С. 1327 - 1327

Опубликована: Март 6, 2023

One of the most significant environmental problems in world is massive release dye wastewater from dyeing industry. Therefore, treatment dyes effluents has received attention researchers recent years. Calcium peroxide (CP) group alkaline earth metal peroxides acts as an oxidizing agent for degradation organic water. It known that commercially available CP a relatively large particle size, which makes reaction rate pollution slow. this study, starch, non-toxic, biodegradable and biocompatible biopolymer, was used stabilizer synthesizing calcium nanoparticles (Starch@CPnps). The Starch@CPnps were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer–Emmet–Teller (BET), dynamic light scattering (DLS), thermogravimetric analysis (TGA), energy dispersive (EDX) scanning electron microscopy (SEM). dyes, methylene blue (MB), using novel oxidant studied three different parameters: initial pH MB solution, dosage contact time. carried out via Fenton reaction, efficiency successfully achieved up to 99%. This study shows potential application starch can reduce size it prevents agglomeration during synthesis.

Язык: Английский

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Grafting with an invasive Xanthium strumarium improves tolerance and phytoremediation of native congener X. sibiricum to cadmium/copper/nickel tailings

Chemosphere, Год журнала: 2022, Номер 308, С. 136561 - 136561

Опубликована: Сен. 22, 2022

Язык: Английский

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Bioremediation pretreatment of waste-activated sludge using microalgae Spirulina platensis derived biochar coupled with sodium sulfite: Performance and microbial community dynamics

Bioresource Technology, Год журнала: 2022, Номер 362, С. 127867 - 127867

Опубликована: Авг. 29, 2022

Язык: Английский

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