scholarly journals Selenium Nanoparticles as an Innovative Selenium Fertilizer Exert Less Disturbance to Soil Microorganisms

2021 ◽  
Vol 12 ◽  
Author(s):  
Jun Liu ◽  
Wen-Yu Qi ◽  
Hui Chen ◽  
Chao Song ◽  
Qiang Li ◽  
...  
Keyword(s):  
Soil Microorganisms ◽  
Environmental Fate ◽  
Slow Release ◽  
Selenium Nanoparticles ◽  
Environment Friendly ◽  
Soil Microbial ◽  
Abundance And Diversity ◽  
And Behavior ◽  
Fate And Behavior ◽  
Typical Soil

Selenium (Se) is an essential trace element in the human body. Se-enriched agricultural products, obtained by applying Se fertilizer, are important sources of Se supplement. However, Se fertilizer may cause a series of environmental problems. This study investigated the transformation of exogenous selenium nanoparticles (SeNPs) and selenite (SeO32–) in soil and explored their effects on soil microbial community and typical microorganisms. SeNPs exhibited a slow-release effect in soil, which promoted the growth of soil microorganisms and enriched soil probiotics. SeO32– was converted to a stable and low toxic state in soil, increasing persistent free radicals and decreasing microbial abundance and diversity. The influences of SeNPs and SeO32– on two typical soil microorganisms (Bacillus sp. and Escherichia coli) were also evaluated, and SeNPs were more difficult to enter into microorganisms directly, with lower toxicity and higher safety. These results indicated that SeNPs were a more environment-friendly Se additive for agriculture applications. This work provides useful information for better understanding the environmental fate and behavior of Se fertilizer in the soil.

Environmental fate and behavior of silver nanoparticles in natural estuarine systems

2020 ◽  
Vol 88 ◽  
pp. 248-259
Author(s):  
Penghui Li ◽  
Min Su ◽  
Xiaodan Wang ◽  
Xiaoyan Zou ◽  
Xia Sun ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Environmental Fate ◽  
Estuarine Systems ◽  
And Behavior ◽  
Fate And Behavior

scholarly journals An Insight into Ingredients of Toxicological Interest in Personal Care Products and A Small–Scale Sampling Survey of the Greek Market: Delineating a Potential Contamination Source for Water Resources

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2501 ◽  
Author(s):  
C. Emmanouil ◽  
M. Bekyrou ◽  
C. Psomopoulos ◽  
A. Kungolos
Keyword(s):  
Environmental Fate ◽  
Wastewater Treatment Plants ◽  
Personal Care Products ◽  
Small Scale ◽  
Personal Care ◽  
Toxicological Profile ◽  
Microbiological Parameters ◽  
Main Activity ◽  
And Behavior ◽  
Fate And Behavior

Wastewater is not a waste but a valuable resource that should be reused. Nevertheless, it should be devoid of physical, chemical, and microbiological parameters that can harm the consumer. Along with the multitude of possible pollutants found in wastewater treatment plants (WWTPs), emerging pollutants, such as Personal Care Products (PCPs), have arisen. The present research examines some of the main ingredients commonly found in PCPs, focusing on their toxicological profile on their occurrence in WWTPs influents and effluents worldwide and on their persistence and biodegradability. A small-scale market sampling of PCPs was performed in Athens, Greece, in June 2019, and their individual ingredients were recorded, coded according to their main activity, scanned for the presence of ingredients of important toxicological profile, and finally analyzed for the presence of other candidates of toxicological interest. Results show that some ingredients of concern (i.e., parabens and triclosan) are a decreasing trend. On the other hand, information on the presence of synthetic musks and perfume synthesis is scarce and encumbered by brand protection. Finally, UV filters are numerous, and they are used in various combinations, while other ingredients of toxicological interest are also present. Since the reclaimed water may well be used to cover irrigation needs in Greek areas with water deficiency or to enrich bodies of surface water, it is important to know what PCP ingredients are on the rise in the market, to monitor their presence in WWTPs influents and effluents and to extend research on their environmental fate and behavior.

scholarly journals An evaluation of the environmental fate and behavior of munitions materiel (TNT, RDX) in soil and plant systems

1989 ◽  
Author(s):  
D.A. Cataldo ◽  
S.D. Harvey ◽  
R.J. Fellows ◽  
R.M. Bean ◽  
B.D. McVeety
Keyword(s):  
Environmental Fate ◽  
And Behavior ◽  
Fate And Behavior

scholarly journals Heteroaggregates of Polystyrene Nanospheres and Organic Matter: Preparation, Characterization and Evaluation of Their Toxicity to Algae in Environmentally Relevant Conditions

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 482
Author(s):  
Laura Rowenczyk ◽  
Joséphine Leflaive ◽  
Fanny Clergeaud ◽  
Antoine Minet ◽  
Jessica Ferriol ◽  
...  
Keyword(s):  
Organic Matter ◽  
Environmental Fate ◽  
Algal Species ◽  
Aquatic Organisms ◽  
Polystyrene Nanospheres ◽  
Other Substances ◽  
The Media ◽  
Low Sensitivity ◽  
And Behavior ◽  
Fate And Behavior

The environmental fate and behavior of nanoplastics (NPs) and their toxicity against aquatic organisms are under current investigation. In this work, relevant physicochemical characterizations were provided to analyze the ecotoxicological risk of NPs in the aquatic compartment. For this purpose, heteroaggregates of 50 nm polystyrene nanospheres and natural organic matter were prepared and characterized. The kinetic of aggregation was assimilated to a reaction-limited colloid aggregation mode and led to the formation of heteroaggregates in the range of 100–500 nm. Toxicities of these heteroaggregates and polystyrene nanospheres (50 and 350 nm) were assessed for a large range of concentrations using four benthic and one planktonic algal species, in regards to particle states in the media. Heteroaggregates and nanospheres were shown to be stable in the exposure media during the ecotoxity tests. The algal species exhibited very low sensitivity (growth and photosynthetic activity), with the noteworthy exception of the planktonic alga, whose growth increased by more than 150% with the heteroaggregates at 1 µg L−1. Despite the lack of a strong direct effect of the NPs, they may still impair the functioning of aquatic ecosystems by destabilizing the competitive interactions between species. Moreover, further work should assess the toxicity of NPs associated with other substances (adsorbed pollutants or additives) that could enhance the NP effects.

scholarly journals Environmental Fate and Behavior of the Herbicide Glyphosate in Sandy Soils of Florida Under Citrus Production

2021 ◽  
Vol 2 ◽  
Author(s):  
Biwek Gairhe ◽  
Wenwen Liu ◽  
Ozgur Batuman ◽  
Peter Dittmar ◽  
Davie Kadyampakeni ◽  
...  
Keyword(s):  
Environmental Fate ◽  
Soil Column ◽  
Sandy Soils ◽  
Vertical Movement ◽  
Citrus Production ◽  
Citrus Orchards ◽  
And Behavior ◽  
Adsorption Desorption ◽  
Fate And Behavior ◽  
Herbicide Glyphosate

Chemical weed control using herbicide glyphosate to manage emerged weeds is an important production practice in Florida citrus. Despite the extensive use of glyphosate in citrus orchards, very limited information is available on its environmental fate and behavior in Florida soils that are predominantly sandy in nature. Hence, the study’s objective was to understand the adsorption-desorption, dissipation dynamics, and vertical movement or leaching of glyphosate in sandy soils in citrus orchards. Laboratory, field, and greenhouse experiments were conducted at Southwest Florida Research and Education Center in Immokalee, Florida. The adsorption-desorption behavior of glyphosate in the soils from three major citrus production areas in Florida was studied utilizing a batch equilibrium method. The dissipation of glyphosate was tracked in the field following its application at the rate of 4.20 kg ae ha−1. Soil leaching columns in greenhouse conditions were used to study the vertical movement of glyphosate. The results suggest that glyphosate has a relatively lower range of adsorption or binding (Kads = 14.28–30.88) in the tested soil types. The field dissipation half-life (DT50) of glyphosate from surface soil was found to be ∼26 days. Glyphosate moved vertically or leached into the soil profile, up to 40 cm in the soil column, when analyzed 40 days after herbicide application. The primary degradation product of glyphosate, i.e., aminomethyl phosphonic acid (AMPA), was also detected up to the depth of 30 cm below the soil surface, indicating the presence of microbial metabolism of glyphosate in the soil.

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