Environmental behavior and associated plant accumulation of silver nanoparticles in the presence of dissolved humic and fulvic acid

Li, Yong; Chen, Haiyan; Wang, Fei; Zhao, Furong; Han, Xiaomin; Geng, Huanhuan; Gao, Ling; Chen, Huilun; Yuan, Rongfang; Yao, Jun

doi:10.1016/j.envpol.2018.09.077

Cited by 32 publications

(12 citation statements)

References 56 publications

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“…[ 226 ] Humic acid has been reported to function as a reducing agent for the synthesis of AgNPs at room temperature and as a capping agent to enhance the colloidal stability of the nanoparticles by preventing them from aggregating into a larger mass of silver. [ 248 ] Compared with chemically synthesized nanoparticles, biogenic AgNPs are generally less toxic to the human body.…”

Section: Microbes As Tiny Cell Factories For Biosynthesis Of Inorganimentioning

confidence: 99%

Microbe‐Mediated Extracellular and Intracellular Mineralization: Environmental, Industrial, and Biotechnological Applications

et al. 2020

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Bacteria play an important role in the calcification process of natural minerals and within organisms ( Table 1). It is Microbe-mediated mineralization is ubiquitous in nature, involving bacteria, fungi, viruses, and algae. These mineralization processes comprise calcification, silicification, and iron mineralization. The mechanisms for mineral formation include extracellular and intracellular biomineralization. The mineral precipitating capability of microbes is often harnessed for green synthesis of metal nanoparticles, which are relatively less toxic compared with those synthesized through physical or chemical methods. Microbe-mediated mineralization has important applications ranging from pollutant removal and nonreactive carriers, to other industrial and biomedical applications. Herein, the different types of microbe-mediated biomineralization that occur in nature, their mechanisms, as well as their applications are elucidated to create a backdrop for future research.

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Section: Microbes As Tiny Cell Factories For Biosynthesis Of Inorganimentioning

confidence: 99%

Microbe‐Mediated Extracellular and Intracellular Mineralization: Environmental, Industrial, and Biotechnological Applications

et al. 2020

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“…Since plants can uptake Ag 2 S-NPs directly without substantial transformation (Wang et al, 2017), the observed phytotoxicity of Ag 2 S-NPs was caused by their nano effects (e.g. reactive oxygen radicals) rather than the released Ag + (Li et al, 2018b). In this study, it was observed that B. subtilis EPS could aggravate Ag 2 S-NP toxicity without significantly decreasing the dissolved Ag Fig.…”

Section: Impact Of Eps On Ag-nps/ag 2 S-nps Dissolutionmentioning

confidence: 65%

“…3A). Because NOM can affect the stability and biotransformation of nanoparticles in aqueous environment (Li et al, 2018b), the enhanced effect of EPS on wheat roots growth was probably not caused by its potential role as a growth matrix, but due to the complexation property of EPS with Ag ions or form EPS-NPs complex (Glenn and Klaine, 2013;Li et al, 2018a), Fig. 1.…”

Section: Ag Bioaccumulation and Phytotoxicity To Wheat Affected By Epsmentioning

confidence: 99%

Effects of extracellular polymeric substances on silver nanoparticle bioaccumulation and toxicity to Triticum aestivum L.

Zhong

Qing

et al. 2021

Chemosphere

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“…Nonetheless, the size exclusion of plant roots may be overcome by endocytosis (Kurepa et al 2010;Liu et al 2009;Pérez-de-Luque 2017), and additional entry points due to physical and disease damage to roots and new emergence of secondary roots (Lv et al 2019;Su et al 2019). Overall, plant uptake of Ag NPs largely depends on the bioavailability of Ag in soils (Li et al 2018;Saleeb et al 2019;Zhang et al 2017). The enhanced aggregation and/or interaction with soil moieties, e.g., iron oxides or organic matters (OM), could decrease the bioavailability of Ag NPs in soils.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the presence of soil OM increased the amount of Ag retained in the solid phase and decreased the dissolved Ag levels (Li et al 2017b). Natural OM decreased the accumulation of Ag in wheat by strongly binding to dissolved Ag + (Li et al 2018). Of particular importance is, therefore, to determine the fractions and bioavailability of Ag NPs associated with soils.…”

Section: Introductionmentioning

confidence: 99%

Biochar amendment changed soil-bound fractions of silver nanoparticles and ions but not their uptake by radish at an environmentally-relevant concentration

et al. 2020

Biochar

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Plant uptake of silver nanoparticles (Ag NPs) and ions (Ag +) largely depends on their exchangeable and soil-bound fractions in soils, which may be influenced by biochar amendment. This study investigated the effects of biochar amendment (0.1% and 1.0%) on soil sorption of Ag NPs and Ag + , their soil-bound fractions, and their uptake and translocation by radish grown in a loamy sand soil spiked with 1 mg/kg Ag NPs or Ag +. Sorption of Ag + to the soils was much greater than that of Ag NPs, mainly because negatively charged soil particles would attract Ag + , but repel negatively charged Ag NPs. Biochar amendment at 1.0% (by weight) significantly decreased the reducible fraction of Ag + in the soils with and without radish plants and increased the oxidisable fraction of Ag NPs in the soils with radish plants. Biochar amendment had no significant effect on Ag uptake by radish plants (p > 0.05), probably due to low exchangeable Ag fractions in all experimental treatments. In this short-term experiment (35 days), the addition of 1 mg/kg Ag NPs or Ag + did not substantially elevate the level of Ag in radish roots (0.05 ± 0.02-1.06 ± 0.98 mg/kg) and shoots (0.01 ± 0.00-0.03 ± 0.01 mg/kg), compared to the blank control (p > 0.05). Radish uptake of Ag NPs and Ag + at the environmentally-relevant concentration was low with root concentration factors between 0.03 ± 0.03 to 0.29 ± 0.21 and root-to-shoot translocation factors between 0.08 ± 0.10 to 0.89 ± 1.21, which may partially explain the non-significant effect of biochar amendment on Ag uptake.

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Environmental behavior and associated plant accumulation of silver nanoparticles in the presence of dissolved humic and fulvic acid

Cited by 32 publications

References 56 publications

Microbe‐Mediated Extracellular and Intracellular Mineralization: Environmental, Industrial, and Biotechnological Applications

Microbe‐Mediated Extracellular and Intracellular Mineralization: Environmental, Industrial, and Biotechnological Applications

Effects of extracellular polymeric substances on silver nanoparticle bioaccumulation and toxicity to Triticum aestivum L.

Biochar amendment changed soil-bound fractions of silver nanoparticles and ions but not their uptake by radish at an environmentally-relevant concentration

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