Micromotors for environmental applications: a review

2018 ◽  
Vol 5 (7) ◽  
pp. 1530-1544 ◽  
Author(s):  
Beatriz Jurado-Sánchez ◽  
Joseph Wang
Keyword(s):  
Water Purification ◽  
Environmental Applications ◽  
Efficient Operation ◽  
Carbon Based

Micromotors and the environment: illustrating the efficient operation of carbon-based micromotors for water purification.

scholarly journals Recent Developments in the Immobilization of Laccase on Carbonaceous Supports for Environmental Applications - A Critical Review

2021 ◽  
Vol 9 ◽  
Author(s):  
Younes Adamian ◽  
Linson Lonappan ◽  
Komla Alokpa ◽  
Spiros N. Agathos ◽  
Hubert Cabana
Keyword(s):  
Culture Media ◽  
High Surface ◽  
High Surface Area ◽  
Catalyst System ◽  
Ligninolytic Enzyme ◽  
Environmental Applications ◽  
Laccase Production ◽  
High Porosity ◽  
Laccase Immobilization ◽  
Carbon Based

Τhe ligninolytic enzyme laccase has proved its potential for environmental applications. However, there is no documented industrial application of free laccase due to low stability, poor reusability, and high costs. Immobilization has been considered as a powerful technique to enhance laccase’s industrial potential. In this technology, appropriate support selection for laccase immobilization is a crucial step since the support could broadly affect the properties of the resulting catalyst system. Through the last decades, a large variety of inorganic, organic, and composite materials have been used in laccase immobilization. Among them, carbon-based materials have been explored as a support candidate for immobilization, due to their properties such as high porosity, high surface area, the existence of functional groups, and their highly aromatic structure. Carbon-based materials have also been used in culture media as supports, sources of nutrients, and inducers, for laccase production. This study aims to review the recent trends in laccase production, immobilization techniques, and essential support properties for enzyme immobilization. More specifically, this review analyzes and presents the significant benefits of carbon-based materials for their key role in laccase production and immobilization.

Sustainable Water Purification Using an Engineered Solvothermal Carbon Based Membrane Derived from a Eutectic System

2019 ◽  
Vol 7 (11) ◽  
pp. 10143-10153 ◽  
Author(s):  
Halanur Mruthunjayappa Manohara ◽  
Kanakaraj Aruchamy ◽  
Supratim Chakraborty ◽  
Nagaraj Radha ◽  
Maalige Rajappa Nidhi ◽  
...  
Keyword(s):  
Water Purification ◽  
Eutectic System ◽  
Carbon Based

Carbon-Based Materials from Borassus flabellifer and their Applications

2021 ◽  
Vol 10 (4) ◽  
pp. 08-12
Author(s):  
C. Thevamirtha ◽  
Sherin Monichan ◽  
P. Mosae Selvakumar
Keyword(s):  
Sustainable Development ◽  
Activated Carbon ◽  
Water Purification ◽  
Anode Materials ◽  
Carbon Materials ◽  
Low Cost ◽  
Carbon Nanodots ◽  
Hard Carbon ◽  
High Demand ◽  
Carbon Based

Plant-based carbon materials are a high-demand source nowadays, as they are low-cost, eco-friendly, easily available, and sustainable.  Borassus flabellifer (Palmyra palm) is a gift of nature that gives numerous benefits, as all parts of the tree can be used for multiple purposes. Palmyraculture is the practice of cultivating Palmyra palms and utilizing them to live a self-reliant life in working towards sustainable development. Due to the advancement of technology, Borassus flabellifer is used to synthesize carbon materials, including hard carbon, carbon nanodots, charcoal, and activated carbon.  These carbon materials can be used in electrochemistry as anode materials, biosensing, bioimaging, catalysts, and water purification. This review mainly focuses on the carbon materials derived from the Borassus flabellifer, their applications in various fields, and further aspects that have to be considered.

DOM affected behavior of manufactured nanoparticles in soil-plant system

2016 ◽  
Author(s):  
Benny Chefetz ◽  
Baoshan Xing ◽  
Leor Eshed-Williams ◽  
Tamara Polubesova ◽  
Jason Unrine
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Root Exudates ◽  
Water Purification ◽  
Defense Mechanisms ◽  
Disease Incidence ◽  
Plant System ◽  
Manufactured Nanoparticles ◽  
Carbon Based

The overall goal of this project was to elucidate the role of dissolved organic matter (DOM) in soil retention, bioavailability and plant uptake of silver and cerium oxide NPs. The environmental risks of manufactured nanoparticles (NPs) are attracting increasing attention from both industrial and scientific communities. These NPs have shown to be taken-up, translocated and bio- accumulated in plant edible parts. However, very little is known about the behavior of NPs in soil-plant system as affected by dissolved organic matter (DOM). Thus DOM effect on NPs behavior is critical to assessing the environmental fate and risks related to NP exposure. Carbon-based nanomaterials embedded with metal NPs demonstrate a great potential to serve as catalyst and disinfectors. Hence, synthesis of novel carbon-based nanocomposites and testing them in the environmentally relevant conditions (particularly in the DOM presence) is important for their implementation in water purification. Sorption of DOM on Ag-Ag₂S NPs, CeO₂ NPs and synthesized Ag-Fe₃O₄-carbon nanotubebifunctional composite has been studied. High DOM concentration (50mg/L) decreased the adsorptive and catalytic efficiencies of all synthesized NPs. Recyclable Ag-Fe₃O₄-carbon nanotube composite exhibited excellent catalytic and anti-bacterial action, providing complete reduction of common pollutants and inactivating gram-negative and gram-positive bacteria at environmentally relevant DOM concentrations (5-10 mg/L). Our composite material may be suitable for water purification ranging from natural to the industrial waste effluents. We also examined the role of maize (Zeamays L.)-derived root exudates (a form of DOM) and their components on the aggregation and dissolution of CuONPs in the rhizosphere. Root exudates (RE) significantly inhibited the aggregation of CuONPs regardless of ionic strength and electrolyte type. With RE, the critical coagulation concentration of CuONPs in NaCl shifted from 30 to 125 mM and the value in CaCl₂ shifted from 4 to 20 mM. This inhibition was correlated with molecular weight (MW) of RE fractions. Higher MW fraction (> 10 kDa) reduced the aggregation most. RE also significantly promoted the dissolution of CuONPs and lower MW fraction (< 3 kDa) RE mainly contributed to this process. Also, Cu accumulation in plant root tissues was significantly enhanced by RE. This study provides useful insights into the interactions between RE and CuONPs, which is of significance for the safe use of CuONPs-based antimicrobial products in agricultural production. Wheat root exudates (RE) had high reducing ability to convert Ag+ to nAg under light exposure. Photo-induced reduction of Ag+ to nAg in pristine RE was mainly attributed to the 0-3 kDa fraction. Quantification of the silver species change over time suggested that Cl⁻ played an important role in photoconversion of Ag+ to nAg through the formation and redox cycling of photoreactiveAgCl. Potential electron donors for the photoreduction of Ag+ were identified to be reducing sugars and organic acids of low MW. Meanwhile, the stabilization of the formed particles was controlled by both low (0-3 kDa) and high (>3 kDa) MW molecules. This work provides new information for the formation mechanism of metal nanoparticles mediated by RE, which may further our understanding of the biogeochemical cycling and toxicity of heavy metal ions in agricultural and environmental systems. Copper sulfide nanoparticles (CuSNPs) at 1:1 and 1:4 ratios of Cu and S were synthesized, and their respective antifungal efficacy was evaluated against the pathogenic activity of Gibberellafujikuroi(Bakanae disease) in rice (Oryza sativa). In a 2-d in vitro study, CuS decreased G. fujikuroiColony- Forming Units (CFU) compared to controls. In a greenhouse study, treating with CuSNPs at 50 mg/L at the seed stage significantly decreased disease incidence on rice while the commercial Cu-based pesticide Kocide 3000 had no impact on disease. Foliar-applied CuONPs and CuS (1:1) NPs decreased disease incidence by 30.0 and 32.5%, respectively, which outperformed CuS (1:4) NPs (15%) and Kocide 3000 (12.5%). CuS (1:4) NPs also modulated the shoot salicylic acid (SA) and Jasmonic acid (JA) production to enhance the plant defense mechanisms against G. fujikuroiinfection. These results are useful for improving the delivery efficiency of agrichemicals via nano-enabled strategies while minimizing their environmental impact, and advance our understanding of the defense mechanisms triggered by the NPs presence in plants. 

All-weather-available electrothermal and solarthermal wood-derived porous carbon-based steam generators for highly efficient water purification

2022 ◽  
Author(s):  
Jing Wu ◽  
Xiaofeng Li ◽  
Tingting Zhang ◽  
Xiao-Peng Li ◽  
Wei Li ◽  
...  
Keyword(s):  
Water Purification ◽  
Porous Carbon ◽  
Light Irradiation ◽  
Solar Light ◽  
Steam Generation ◽  
Steam Generators ◽  
Water Steam ◽  
Solar Light Irradiation ◽  
Solar Steam Generation ◽  
Carbon Based

Solar steam generation devices cannot work properly under weak solar light irradiation and even no solar light. Herein, an all-weather-available electrothermal and solarthermal wood-derived porous carbon-based water steam generation device...

Sign in / Sign up

Export Citation Format

Share Document