Humic substances alleviate the aquatic toxicity of polyvinylpyrrolidone-coated silver nanoparticles to organisms of different trophic levels

2015 ◽  
Vol 34 (6) ◽  
pp. 1239-1245 ◽  
Author(s):  
Zhuang Wang ◽  
Joris T.K. Quik ◽  
Lan Song ◽  
Evert-Jan Van Den Brandhof ◽  
Marja Wouterse ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Humic Substances ◽  
Aquatic Toxicity ◽  
Trophic Levels

scholarly journals Aquatic Toxicity Comparison of Silver Nanoparticles and Silver Nanowires

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Eun Kyung Sohn ◽  
Seyed Ali Johari ◽  
Tae Gyu Kim ◽  
Jin Kwon Kim ◽  
Ellen Kim ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Daphnia Magna ◽  
Silver Nanowires ◽  
Aquatic Toxicity ◽  
Oryzias Latipes ◽  
Aquatic Environments ◽  
Silver Nanomaterials ◽  
Raphidocelis Subcapitata ◽  
Test Organisms ◽  
Test Fish

To better understand the potential ecotoxicological impact of silver nanoparticles (AgNPs) and silver nanowires (AgNWs) released into freshwater environments, the toxicities of these nanomaterials were assessed and compared using Organization for Economic Cooperation and Development (OECD) test guidelines, including a “Daphniasp., acute immobilization test,” “Fish, acute toxicity test,” and “freshwater alga and cyanobacteria, growth inhibition test.” Based on the estimated median lethal/effective concentrations of AgNPs and AgNWs, the susceptibility to the nanomaterials was different among test organisms (daphnia > algae > fish), suggesting that the AgNPs are classified as “category acute 1” forDaphnia magna, “category acute 2” forOryzias latipes, and “category acute 1” forRaphidocelis subcapitata, while the AgNWs are classified as “category acute 1” forDaphnia magna, “category acute 2” forOryzias latipes, and “category acute 2” forRaphidocelis subcapitata, according to the GHS (Globally Harmonized System of Classification and Labelling of Chemicals). In conclusion, the present results suggest that more attention should be paid to prevent the accidental or intentional release of silver nanomaterials into freshwater aquatic environments.

Silver nanoparticles stabilized by humic substances adversely affect wheat plants and soil

2020 ◽  
Vol 22 (5) ◽  
Author(s):  
Natalia A. Kulikova ◽  
Dmitry S. Volkov ◽  
Alexander B. Volikov ◽  
Dmitry P. Abroskin ◽  
Alexey I. Krepak ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Humic Substances

scholarly journals Toxicity of leachates from pilot reactors simulating a landfill with different concentrations of AgNP

2019 ◽  
Vol 24 (6) ◽  
pp. 1089-1094
Author(s):  
Raphael Zanelato ◽  
Isabela da Cruz Bonatto ◽  
José Julio Barrios Restrepo ◽  
Rodrigo Costa Puerari ◽  
William Gerson Matias ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Acute Toxicity ◽  
Aquatic Ecosystems ◽  
Aquatic Invertebrates ◽  
Trophic Levels ◽  
Toxicity Tests ◽  
Treatment Efficiency ◽  
Landfill Leachates ◽  
Acute Toxicity Tests

ABSTRACT This work’s objective was to verify the leachates toxicity from pilot reactors (PR) simulating a landfill containing different concentrations of silver nanoparticles (AgNP). Acute toxicity tests (48 h) with Daphnia magna were carried out in leachates containing 50, 150 and 450 mg AgNP.kg-1, in addition to a blank for control. Toxicity tests with the pure solution of silver nanoparticle and leachates resulted by the reactors were performed. The acute toxicity tests performed with D. magna confirmed the toxicity of the leachates, as well as confirmed that the silver nanoparticles are toxic, presenting EC50 (48 h) of 0.63 µg.L-1 of pure nanoparticle and ranging from 1.52 to 3.37% for the leachates. Overall, the results from the present study indicate that exposures of aquatic invertebrates to silver nanoparticles could have important ecological effects on lower trophic levels in aquatic ecosystems. The results may contribute to a better understanding of the quality of municipal solid waste (MSW) landfill leachates, with reference to nanoparticle interference and consequent treatment efficiency.

scholarly journals Effect of UV-A, UV-B and UV-C irradiation of glyphosate on photolysis and mitigation of aquatic toxicity

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Dimitra Papagiannaki ◽  
Claudio Medana ◽  
Rita Binetti ◽  
Paola Calza ◽  
Peter Roslev
Keyword(s):  
High Resolution Mass Spectrometry ◽  
Aquatic Toxicity ◽  
Aquatic Organisms ◽  
Transformation Products ◽  
Trophic Levels ◽  
Indirect Photolysis ◽  
Before And After ◽  
Test Organisms ◽  
Inorganic Constituents ◽  
Uv C

AbstractThe active herbicide ingredient glyphosate [N-(phosphonomethyl)glycine] is frequently detected as a contaminant in groundwater and surface waters. This study investigated effects of UV-A (365 nm), UV-B (302 nm) and UV-C (254 nm) irradiation of glyphosate in water on photolysis and toxicity to aquatic organisms from different trophic levels. A test battery with bacteria (Bacillus subtilis, Aliivibrio fischeri), a green microalga (Raphidocelis subcapitata), and a crustacean (Daphnia magna) was used to assess biological effect of glyphosate and bioactive transformation products before and after UV irradiation (4.7–70 J/cm2). UV-C irradiation at 20 J/cm2 resulted in a 2–23-fold decrease in toxicity of glyphosate to aquatic test organisms. UV-B irradiation at 70 J/cm2 caused a twofold decrease whereas UV-A did not affect glyphosate toxicity at doses ≤ 70 J/cm2. UV-C irradiation of glyphosate in drinking water and groundwater with naturally occurring organic and inorganic constituents showed comparable or greater reduction in toxicity compared to irradiation in deionized water. High-resolution mass spectrometry analyses of samples after UV-C irradiation showed > 90% decreases in glyphosate concentrations and the presence of multiple transformation products. The study suggests that UV mediated indirect photolysis can decrease concentrations of glyphosate and generate less toxic products with decreased overall toxicity to aquatic organisms.

Disulfide Oil Hazard Assessment Using Categorical Analysis and a Mode of Action Determination

2013 ◽  
Vol 33 (1_suppl) ◽  
pp. 181S-198S ◽  
Author(s):  
David Morgott ◽  
Christopher Lewis ◽  
James Bootman ◽  
Marcy Banton
Keyword(s):  
Mode Of Action ◽  
Chemical Constituents ◽  
Bond Cleavage ◽  
Aquatic Toxicity ◽  
Dimethyl Disulfide ◽  
Trophic Levels ◽  
Hazard Evaluation ◽  
Radical Intermediate ◽  
Worst Case ◽  
Categorical Analysis

Diethyl and diphenyl disulfides, naphtha sweetening (Chemical Abstracts Service [CAS] # 68955-96-4), are primarily composed of low-molecular-weight dialkyl disulfides extracted from C4 to C5 light hydrocarbon streams during the refining of crude oil. The substance, commonly known as disulfide oil (DSO), can be composed of up to 17 different disulfides and trisulfides with monoalkyl chain lengths no greater than C4. The disulfides in DSO constitute a homologous series of chemical constituents that are perfectly suited for a hazard evaluation using a read-across/worst-case approach. The DSO constituents exhibit a common mode of action that is operable at all trophic levels. The observed oxidative stress response is mediated by reactive oxygen species and free radical intermediates generated after disulfide bond cleavage and subsequent redox cycling of the resulting mercaptan. Evidence indicates that the lowest series member, dimethyl disulfide (DMDS), can operate as a worst-case surrogate for other members of the series, since it displays the highest toxicity. Increasing the alkyl chain length or degree of substitution has been shown to serially reduce disulfide toxicity through resonance stabilization of the radical intermediate or steric inhibition of the initial enzymatic step. The following case study examines the mode of action for dialkyl disulfide toxicity and documents the use of read-across information from DMDS to assess the hazards of DSO. The results indicate that DSO possesses high aquatic toxicity, moderate environmental persistence, low to moderate acute toxicity, high repeated dose toxicity, and a low potential for genotoxicity, carcinogenicity, and reproductive/developmental effects.

ACUTE TO CHRONIC RATIOS IN AQUATIC TOXICITY—VARIATION ACROSS TROPHIC LEVELS AND RELATIONSHIP WITH CHEMICAL STRUCTURE

2006 ◽  
Vol 25 (11) ◽  
pp. 2937 ◽  
Author(s):  
Jan Ahlers ◽  
Caroline Riedhammer ◽  
Michaela Vogliano ◽  
Ralf-Uwe Ebert ◽  
Ralph Kühne ◽  
...  
Keyword(s):  
Chemical Structure ◽  
Aquatic Toxicity ◽  
Trophic Levels

scholarly journals Effect of Silver Nanoparticles on Aquatic Organisms

2020 ◽  
Vol 10 (1) ◽  
pp. 2012-2015
Keyword(s):  
Silver Nanoparticles ◽  
Aquatic Ecosystem ◽  
Aquatic Invertebrates ◽  
Aquatic Organisms ◽  
Aquatic Organism ◽  
Neurological Impairment ◽  
Trophic Levels ◽  
Direct Impact ◽  
The Past ◽  
The Impact

Silver nanoparticles are extensively used in the past few years. The presence of these silver nanoparticles concerns the risks they pose to the environment as a whole. Their tiny size and higher surface area make them a very potent threat in the aquatic ecosystem. The interactions and bioaccumulation in the aquatic ecosystem have led to disturbances in the food chain of the aquatic organism. The silver nanoparticles have caused biochemical, physiological, morphological, and neurological impairment in the aquatic organisms. There are several studies that not only report the direct impact of these AgNPs on the water bodies but also report the impact of ligand-bound AgNPs on aquatic invertebrates at different trophic levels and different medium. This literature review attempts to integrate recent findings on the impact of silver nanoparticles and associated studies on aquatic organisms.

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