scholarly journals Modern Carbon–Based Materials for Adsorptive Removal of Organic and Inorganic Pollutants from Water and Wastewater

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6628
Author(s):  
Vera I. Isaeva ◽  
Marina D. Vedenyapina ◽  
Alexandra Yu. Kurmysheva ◽  
Dirk Weichgrebe ◽  
Rahul Ramesh Nair ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Human Life ◽  
Water Remediation ◽  
Future Research ◽  
Inorganic Pollutants ◽  
Adsorption Mechanisms ◽  
Adsorption Performance ◽  
Oxidized Carbon ◽  
Hazardous Organics ◽  
Carbon Based

Currently, a serious threat for living organisms and human life in particular, is water contamination with persistent organic and inorganic pollutants. To date, several techniques have been adopted to remove/treat organics and toxic contaminants. Adsorption is one of the most effective and economical methods for this purpose. Generally, porous materials are considered as appropriate adsorbents for water purification. Conventional adsorbents such as activated carbons have a limited possibility of surface modification (texture and functionality), and their adsorption capacity is difficult to control. Therefore, despite the significant progress achieved in the development of the systems for water remediation, there is still a need for novel adsorptive materials with tunable functional characteristics. This review addresses the new trends in the development of new adsorbent materials. Herein, modern carbon-based materials, such as graphene, oxidized carbon, carbon nanotubes, biomass-derived carbonaceous matrices—biochars as well as their composites with metal-organic frameworks (MOFs) and MOF-derived highly-ordered carbons are considered as advanced adsorbents for removal of hazardous organics from drinking water, process water, and leachate. The review is focused on the preparation and modification of these next-generation carbon-based adsorbents and analysis of their adsorption performance including possible adsorption mechanisms. Simultaneously, some weak points of modern carbon-based adsorbents are analyzed as well as the routes to conquer them. For instance, for removal of large quantities of pollutants, the combination of adsorption and other methods, like sedimentation may be recommended. A number of efficient strategies for further enhancing the adsorption performance of the carbon-based adsorbents, in particular, integrating approaches and further rational functionalization, including composing these adsorbents (of two or even three types) can be recommended. The cost reduction and efficient regeneration must also be in the focus of future research endeavors. The targeted optimization of the discussed carbon-based adsorbents associated with detailed studies of the adsorption process, especially, for multicomponent adsorbate solution, will pave a bright avenue for efficient water remediation.

scholarly journals Infrastructural nature

2021 ◽  
pp. 030913252199391
Author(s):  
Sara H Nelson ◽  
Patrick Bigger
Keyword(s):  
Political Economy ◽  
Ecosystem Services ◽  
Strategic Management ◽  
Ecosystem Management ◽  
Human Life ◽  
Ecosystem Functions ◽  
Future Research ◽  
The Political ◽  
Conservation Science ◽  
Conservation Investment

The assertion that ‘ecosystems are infrastructure’ is now common in conservation science and ecosystem management. This article interrogates this infrastructural ontology, which we argue underpins diverse practices of conservation investment and ecosystem management focused on the strategic management of ecosystem functions to sustain and secure human life. We trace the genealogies and geographies of infrastructural nature as an ontology and paradigm of investment that coexists (sometimes in tension) with extractivist commodity regimes. We draw links between literatures on the political economy of ecosystem services and infrastructure and highlight three themes that hold promise for future research: labor, territory, and finance.

scholarly journals Mechanisms and adsorption capacities of biochar for the removal of organic and inorganic pollutants from industrial wastewater

2020 ◽  
Author(s):  
T. G. Ambaye ◽  
M. Vaccari ◽  
E. D. van Hullebusch ◽  
A. Amrane ◽  
S. Rtimi
Keyword(s):  
Organic Contaminants ◽  
Pyrolysis Temperature ◽  
Low Cost ◽  
Industrial Effluents ◽  
Economic Benefits ◽  
Inorganic Pollutants ◽  
Solution Ph ◽  
Adsorption Mechanisms ◽  
Adsorption Capacities ◽  
Temperature Solution

AbstractCurrently, due to the rapid growth of urbanization and industrialization in developing countries, a large volume of wastewater is produced from industries that contain chemicals generating high environmental risks affecting human health and the economy if not treated properly. Consequently, the development of a sustainable low-cost wastewater treatment approach has attracted more attention of policymakers and scientists. The present review highlights the recent applications of biochar in removing organic and inorganic pollutants present in industrial effluents. The recent modes of preparation, physicochemical properties and adsorption mechanisms of biochar in removing organic and inorganic industrial pollutants are also reviewed comprehensively. Biochar showed high adsorption of industrial dyes up to 80%. It also discusses the recent application and mechanism of biochar-supported photocatalytic materials for the degradation of organic contaminants in wastewater. We reviewed also the possible optimizations (such as the pyrolysis temperature, solution pH) allowing the increase of the adsorption capabilities of biochar leading to organic contaminants removal. Besides, increasing the pyrolysis temperature of the biochar was seen to lead to an increase in its surface area, while it decreases their amount of oxygen-containing functional groups, consequently leading to a decrease in the adsorption of metal (loid) ions present in the medium. Finally, the review suggests that more research should be carried out to optimize the main parameters involved in biochar production and its regeneration methods. Future efforts should be also carried out towards process engineering to improve its adsorption capacity to increase the economic benefits of its implementation.

scholarly journals Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1280
Author(s):  
Vu Duc Canh ◽  
Seiichiro Tabata ◽  
Shun Yamanoi ◽  
Yoichi Onaka ◽  
Toshiyuki Yokoi ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Activated Carbons ◽  
Carbon Adsorbents ◽  
Rice Husks ◽  
Porous Carbons ◽  
Inorganic Pollutants ◽  
Steam Activation ◽  
Virus Removal ◽  
Silica Removal ◽  
Effective Removal

Porous carbons are well-known efficient adsorbents for a variety of organic and inorganic pollutants; however, they have difficulty in virus removal. In this study, novel porous carbons (NPCs) (NPC-A, NPC-B, and NPC-C) derived from rice husks were compared with commercially available activated carbons (ACs) for their ability to remove MS2 bacteriophages (MS2) in a batch experiment. NPC-A was produced by the silica removal process. NPC-B was prepared with an additional steam activation applied to NPC-A. NPC-C was obtained with an additional acid rinse applied to NPC-B. The NPCs (particularly NPC-C) exhibited effective removal of up to 5.3 log10 of MS2, which was greater than that of less than 2.7 log10 obtained by other ACs under 10 g/L during the same contact time (60 min). The pore size distribution of the porous carbon adsorbents was found to influence their virus removal performance. The adsorbents with a larger proportion of pores ranging from 200–4500 nm in diameter were able to achieve higher virus removal rates. Thus, NPCs (particularly NPC-C), which had a larger volume of pores ranging from 200–4500 nm in size, demonstrated the potential for use as efficient adsorbents for removing viruses during water purification.

Adsorption mechanisms of metal cations from water on an oxidized carbon surface

2010 ◽  
Vol 345 (2) ◽  
pp. 461-466 ◽  
Author(s):  
C. Moreno-Castilla ◽  
M.A. Álvarez-Merino ◽  
L.M. Pastrana-Martínez ◽  
M.V. López-Ramón
Keyword(s):  
Metal Cations ◽  
Carbon Surface ◽  
Adsorption Mechanisms ◽  
Oxidized Carbon

Carbon-Based Sorbents with Three-Dimensional Architectures for Water Remediation

Small ◽  
2015 ◽  
Vol 11 (27) ◽  
pp. 3319-3336 ◽  
Author(s):  
Bo Chen ◽  
Qinglang Ma ◽  
Chaoliang Tan ◽  
Teik-Thye Lim ◽  
Ling Huang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Water Remediation ◽  
Carbon Based

Adsorption Mechanisms of Pentafluoropropanol (5FP) onto Activated Carbons Produced by Tetraethoxysilane Sol–Gel Method

1997 ◽  
Vol 195 (1) ◽  
pp. 164-168 ◽  
Author(s):  
Naohito Kawasaki ◽  
Seiki Tanada ◽  
Takeo Nakamura ◽  
Takashi Ohue ◽  
Ikuo Abe
Keyword(s):  
Activated Carbons ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Adsorption Mechanisms

scholarly journals Spinel Ferrite Based Nanomaterials for Water Remediation Application

2021 ◽  
pp. 218-245
Author(s):  
R. Jasrotia
Keyword(s):  
Wastewater Treatment ◽  
New Technologies ◽  
Spinel Ferrite ◽  
Cost Effective ◽  
Spinel Ferrites ◽  
Water Remediation ◽  
Polluted Water ◽  
Wastewater Remediation ◽  
Inorganic Pollutants

The decreasing levels of consumable water on earth have been a serious issue and this issue makes the researchers and scientists develop new technologies for the purification of polluted water. Several reports have been carried on wastewater remediation by utilizing spinel ferrite-based nanoparticles and their composites. The spinel ferrites-based nanoparticles utilized for wastewater treatment was cost effective, chemically stable, easily retrieved and reusable. The present work addresses the various fabrication techniques for the preparation of spinel ferrite-based nanoparticles and their utilization for the removal of organic and inorganic pollutants through the adsorption paths.

Development and validation of the Mental-Physical Verb Norms (MPVN): A Text Analysis Measure of Mental State Attribution

2021 ◽  
Author(s):  
Ram Isaac Orr ◽  
michael gilead
Keyword(s):  
Text Analysis ◽  
Human Life ◽  
Mental States ◽  
Future Research ◽  
Intentional Stance ◽  
Unique Contribution ◽  
Mental State Attribution ◽  
Text Content ◽  
Normative Ratings ◽  
Development And Validation

Attribution of mental states to self and others, i.e., mentalizing, is central to human life. Current measures are lacking in ability to directly gauge the extent of individuals engage in spontaneous mentalizing. Focusing on natural language use as an expression of inner psychological processes, we developed the Mental-Physical Verb Norms (MPVN). These norms are participant-derived ratings of the extent to which common verbs reflect mental (opposite physical) activities and occurrences, covering ~80% of all verbs appearing within a given English text. Content validity was assessed against existing expert-compiled dictionaries of mental states and cognitive processes, as well as against normative ratings of verb concreteness. Criterion Validity was assessed through natural text analysis of internet comments relating to mental health vs. physical health. Results showcase the unique contribution of the MPVN ratings as a measure of the degree to which individuals adopt the intentional stance in describing targets, by describing both self and others in mental, opposite physical terms. We discuss potential uses for future research across various psychological and neurocognitive disciplines.

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