Relative importance of humic and fulvic acid on ROS generation, dissolution, and toxicity of sulfide nanoparticles

Shang, Enxiang; Li, Yang; Niu, Junfeng; Zhou, Yijing; Wang, Tianyu; Crittenden, John C.

doi:10.1016/j.watres.2017.08.001

Cited by 85 publications

(42 citation statements)

References 51 publications

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“…under ultraviolet irradiation have been compared. [201] Results show that HA and FA decreased •O 2 − , •OH, and 1 O 2 concentrations generated by WS 2 and MoS 2 NPs while promoting the •O 2 − generated by the CdS NPs. As a result, HA and FA exhibited limited alteration of the toxicity of CdS NPs toward E. coli, whilst decreasing the toxicity of WS 2 and MoS 2 NPs.…”

Section: Oxidative Stressmentioning

confidence: 84%

“…[200] It has been reported that NOM is able to influence the photochemical reactions of ENMs through direct surface binding or indirectly generating highly reactive intermediates as a photosensitizer or a ROS quencher. [201,202] To address this issue, the effects of HA and FA on the ROS generation of sulfide NPs including WS 2 , MoS 2 , and CdS NPs Figure 6. Altered interactions between ENMs and cell membrane by the acquisition of an environmental corona.…”

Section: Oxidative Stressmentioning

confidence: 99%

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The Crucial Role of Environmental Coronas in Determining the Biological Effects of Engineered Nanomaterials

Wang

et al. 2020

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In aquatic environments, a large number of ecological macromolecules (e.g., natural organic matter (NOM), extracellular polymeric substances (EPS), and proteins) can adsorb onto the surface of engineered nanomaterials (ENMs) to form a unique environmental corona. The presence of environmental corona as an eco–nano interface can significantly alter the bioavailability, biocompatibility, and toxicity of pristine ENMs to aquatic organisms. However, as an emerging field, research on the impact of the environmental corona on the fate and behavior of ENMs in aquatic environments is still in its infancy. To promote a deeper understanding of its importance in driving or moderating ENM toxicity, this study systemically recapitulates the literature of representative types of macromolecules that are adsorbed onto ENMs; these constitute the environmental corona, including NOM, EPS, proteins, and surfactants. Next, the ecotoxicological effects of environmental corona‐coated ENMs on representative aquatic organisms at different trophic levels are discussed in comparison to pristine ENMs, based on the reported studies. According to this analysis, molecular mechanisms triggered by pristine and environmental corona‐coated ENMs are compared, including membrane adhesion, membrane damage, cellular internalization, oxidative stress, immunotoxicity, genotoxicity, and reproductive toxicity. Finally, current knowledge gaps and challenges in this field are discussed from the ecotoxicology perspective.

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Section: Oxidative Stressmentioning

confidence: 84%

Section: Oxidative Stressmentioning

confidence: 99%

The Crucial Role of Environmental Coronas in Determining the Biological Effects of Engineered Nanomaterials

Wang

et al. 2020

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“…The reactivity of HAs has been attributed to the presence of phenolic and quinoid moieties [ 27 ], and HAs can behave as electron donors or acceptors, depending on the redox state of the system [ 27 ]. Thus, each HA macromolecule contains multiple antioxidant sites, a property that makes them very attractive from the environmental and biomedical point of view [ 28 ]. Considering that HAs have significant antioxidant capacity and do not have toxicity for living organisms, they have significant potential for use in the pharmaceutical or food industries [ 29 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Characterization and Antioxidant Activity of Humic Acids Isolated from Peat of Various Origins

et al. 2018

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Although humic acids (HAs) from peat exhibit various therapeutic properties, there is little information available concerning their physicochemical and antioxidant properties. To address this issue, nine different types of peat, including oligotrophic, mesotrophic, and minerotrophic peat samples, were used for isolation of HA fractions by basic (HAb) and pyrophosphate (HAp) extractions. Physical parameters of the HAs were analyzed by UV-Vis, fluorescent, infrared (IR), and electron paramagnetic resonance (EPR) spectroscopy. Average Mr of the fractions ranged from 17.2 to 39.7 kDa, while their humification index (HIX) varied from 0.49 to 1.21. HAp fractions had a higher content of aromatic structures compared to HAb fractions. Moreover, HAp fractions had a significantly higher content of phenolic OH groups (3.6 ± 0.5 mmol/g) versus HAb (3.1 ± 0.5 mmol/g). All HA fractions exhibited antioxidant activity in radical scavenging and electrochemical assays, and their EPR signal had a single line with g = 2.0035, which is consistent with semiquinone type radicals. Furthermore, the HIX was found to be important in determining the number of semiquinone-type free radicals in the HA structures. Overall, these data provide a molecular basis to explain at least part of the beneficial therapeutic properties of peat-derived HAs.

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“…The zeta potentials of PVP‐AgNPs were less than −33 mV in all concentrations of FA solutions. This phenomenon occurred because AgNPs with large surface area could adsorb FA and the carboxylic acid and phenolic functional groups could render negative charges (Adegboyega et al, ; Shang et al, ). The negative zeta potential of PVP‐AgNPs decreased from −23.6 mV in DI water to −38 to −33 mV after addition of 5–50 mg/L FA.…”

Section: Results and Disscussionmentioning

confidence: 99%

“…PVP‐AgNPs was selected as model nanoparticle due to their wide applications. Fulvic acid (FA) is selected because it is the main component of NOM (Shang et al, ). The amphiphilic sodium dodecylbenzenesulfonate (SDBS) is selected to represent an anionic surfactant because it is one of the most common laundry detergent formulas (Skoglund et al, ).…”

Section: Introductionmentioning

confidence: 99%

Aggregation kinetics and mechanisms of silver nanoparticles in simulated pollution water under UV light irradiation

Zhang

Shang

et al. 2019

Water Environment Research

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This paper investigated the effect mechanism of complex components (fulvic acid [FA], sodium dodecylbenzene sulfonate [SDBS], and sodium nitrate [NaNO 3 ]) on the aggregation kinetics of polyvinylpyrrolidone-modified silver nanoparticles (PVP-AgNPs) under UV irradiation. The results showed that FA and NaNO 3 alone did not cause aggregation due to the high steric hindrance and/or electrostatic repulsive forces. In high concentration of SDBS solution (20-50 mM), the stability of PVP-AgNPs was reduced by adsorbing SDBS on nanoparticle surface and replacing their PVP coatings. A mixed system of two pollutants had a synergistic effect on PVP-AgNPs aggregation. In the mixed system of SDBS and FA, the interaction of SDBS and PVP-AgNPs dominated the aggregation of PVP-AgNPs. NaNO 3 significantly improved the aggregation rate of PVP-AgNPs in SDBS solution due to the charge neutralization effect of electrolyte. In 20 mg/L FA solution, the aggregation rate increased slightly with increasing NaNO 3 concentration from 50 to 200 mM due to the charge neutralization effect, while the hydrodynamic diameters of PVP-AgNPs increased linearly and rapidly to micrometer size because the spatial conformation of adsorbed FA became compact in high-salinity solution. The calculation results of eDLVO theory were basically consistent with most of the experimental results. © 2019 Water Environment Federation • Practitioner points• PVP-AgNPs was uniformly dispersed in NaNO 3 or FA solution under UV irradiation. • PVP-AgNPs formed aggregates in SDBS solutions under UV irradiation.• A system with two mixed pollutants had a synergistic effect on promoting aggregation of PVP-AgNPs. • eDLVO theory could explain the aggregation results in different chemical conditions except in NaNO 3 solution.

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Relative importance of humic and fulvic acid on ROS generation, dissolution, and toxicity of sulfide nanoparticles

Cited by 85 publications

References 51 publications

The Crucial Role of Environmental Coronas in Determining the Biological Effects of Engineered Nanomaterials

The Crucial Role of Environmental Coronas in Determining the Biological Effects of Engineered Nanomaterials

Physicochemical Characterization and Antioxidant Activity of Humic Acids Isolated from Peat of Various Origins

Aggregation kinetics and mechanisms of silver nanoparticles in simulated pollution water under UV light irradiation

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