Humic acid regulation of the environmental behavior and phytotoxicity of silver nanoparticles to <i>Lemna minor</i>

Ding, Yuanyuan; Bai, Xue; Ye, Zhengfang; Gong, Dongqing; Cao, Jiajing; Hua, Zulin

doi:10.1039/c9en00980a

Cited by 23 publications

(17 citation statements)

References 27 publications

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“…Some critical issues emerged from the literature about the protocols proposed by the standardized ISO and OECD guidelines. Methodologies and conditions are not always suitable for the optimal application of ecotoxicological tests based on freshwater plants (e.g., Cairns and Niederlehner, 1995 ; Navarro et al 2002 ; Gubbins et al 2011 ; Pereira et al 2018 ; Ding et al 2019 ) mainly due to the following limitations: Ecosystem complexity . Most of these guidelines refer to experimental tests carried out exclusively under controlled laboratory conditions; this obviously involves some problems (e.g., short time frame, small scale, lack of synergic effects, and complexity of interaction found in nature) that restrict the capability to extrapolate the real status of a natural system from controlled experiments (Carpenter 1996 ; Petersen et al 1997 ; Schindler 1998 ).…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the outputs obtained do not fully reflect the actual harmful effects of tested contaminants on plants in nature. For example, the toxic effects of silver nanoparticles (AgNPs) on Lemna minor (Ding et al 2019 ) are mitigated by the presence of natural suspended substances such as humic acids (HA). HA appear to reduce the absorption capacity of AgNPs in Lemna , therefore limiting the phytotoxical effects in the plant.…”

Section: Resultsmentioning

confidence: 99%

Section: Critical Issues In Standardized Plant-based Ecotoxicologicalmentioning

confidence: 99%

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Aquatic plants and ecotoxicological assessment in freshwater ecosystems: a review

Ceschin

Bellini

Scalici

2020

Environ Sci Pollut Res

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This paper reviews the current state-of-the-art, limitations, critical issues, and new directions in freshwater plant ecotoxicology. We selected peer-reviewed studies using relevant databases and for each (1) publication year, (2) test plant species, (3) reference plant group (microalgae, macroalgae, bryophytes, pteridophytes, flowering plants), (4) toxicant tested (heavy metal, pharmaceutical product, hydrocarbon, pesticide, surfactant, plastic), (5) experiment site (laboratory, field), and (6) toxicant exposure duration. Although aquatic plant organisms play a key role in the functioning of freshwater ecosystems, mainly linked to their primary productivity, their use as biological models in ecotoxicological tests was limited if compared to animals. Also, toxicant effects on freshwater plants were scarcely investigated and limited to studies on microalgae (80%), or only to a certain number of recurrent species (Pseudokirchneriella subcapitata, Chlorella vulgaris, Lemna minor, Myriophyllum spicatum). The most widely tested toxicants on plants were heavy metals (74%), followed by pharmaceutical products and hydrocarbons (7%), while the most commonly utilized endpoints in tests were plant growth inhibition, variations in dry or fresh weight, morpho-structural alterations, chlorosis, and/or necrosis. The main critical issues emerged from plant-based ecotoxicological tests were the narrow range of species and endpoints considered, the lack of environmental relevance, the excessively short exposure times, and the culture media potentially reacting with toxicants. Proposals to overcome these issues are discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Critical Issues In Standardized Plant-based Ecotoxicologicalmentioning

confidence: 99%

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Aquatic plants and ecotoxicological assessment in freshwater ecosystems: a review

Ceschin

Bellini

Scalici

2020

Environ Sci Pollut Res

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“…That is the case of molecules with a high reduced sulfur content that bind metal ions with high affinity [149]. The toxicity of AgNPs for both microbes and non-target species has been shown to decrease following the addition of molecules rich in thiol groups in solution, such as natural organic matter or cysteine [18,[150][151][152].…”

Section: Role Of the Surface Coating In Agnps Ecotoxicitymentioning

confidence: 99%

“…Removal efficacy and ecotoxicity are tested in parallel in order to obtain best adsorption performances with no risk for the exposed organisms (Figure 4). following the addition of molecules rich in thiol groups in solution, such as natural organic matter or cysteine [18,[150][151][152]. Several studies have assessed the toxicity of sulfur functionalized AgNPs, and always reported a reduction in toxicity compared to pristine AgNPs.…”

Section: Ecosafe By Design Approachmentioning

confidence: 99%

Silver Nanoparticles for Water Pollution Monitoring and Treatments: Ecosafety Challenge and Cellulose-Based Hybrids Solution

et al. 2020

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Silver nanoparticles (AgNPs) are widely used as engineered nanomaterials (ENMs) in many advanced nanotechnologies, due to their versatile, easy and cheap preparations combined with peculiar chemical-physical properties. Their increased production and integration in environmental applications including water treatment raise concerns for their impact on humans and the environment. An eco-design strategy that makes it possible to combine the best material performances with no risk for the natural ecosystems and living beings has been recently proposed. This review envisages potential hybrid solutions of AgNPs for water pollution monitoring and remediation to satisfy their successful, environmentally safe (ecosafe) application. Being extremely efficient in pollutants sensing and degradation, their ecosafe application can be achieved in combination with polymeric-based materials, especially with cellulose, by following an eco-design approach. In fact, (AgNPs)–cellulose hybrids have the double advantage of being easily produced using recycled material, with low costs and possible reuse, and of being ecosafe, if properly designed. An updated view of the use and prospects of these advanced hybrids AgNP-based materials is provided, which will surely speed their environmental application with consequent significant economic and environmental impact.

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Contribution of Chemometric Modeling to Chemical Risks Assessment for Aquatic Plants

Hamadache

Amrane

Benkortbi

et al. 2021

Chemometrics and Cheminformatics in Aquatic Toxicology

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Humic acid regulation of the environmental behavior and phytotoxicity of silver nanoparticles to Lemna minor

Abstract: Results suggest that molecular interaction occurs between AgNPs and HA functional groups and HA can reduce the toxicity of AgNPs to Lemna minor.

Cited by 23 publications

References 27 publications

Aquatic plants and ecotoxicological assessment in freshwater ecosystems: a review

Aquatic plants and ecotoxicological assessment in freshwater ecosystems: a review

Silver Nanoparticles for Water Pollution Monitoring and Treatments: Ecosafety Challenge and Cellulose-Based Hybrids Solution

Contribution of Chemometric Modeling to Chemical Risks Assessment for Aquatic Plants

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