Bio-Based Substances from the Compost of Bio-Waste for Decontamination of Waste Water
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Bio-based Materials: Smart and Packaging Applications
Submission Deadline: October 15, 2022 (Open) Submit Now
Consuelo Fritz, PhD
Universidad de Chile, Santiago, Chile
Research Interests: bio-based and composite materials; nanotechnology; nanocellulose; interfacial chemistry; surface active components; characterization and analysis of biopolymers
About this topic
Currently, the consumers and regulatory agencies demand the utilization of more environmentally friendly packaging. The development of bio-based materials for packaging applications has gained interest due to the concerns regarding petroleum-based plastic packaging materials.
The necessity for a sophisticated packaging involves achieving a component with at least equal performance of existing materials in terms of mechanical and thermal properties, barrier properties (liquid, water vapor, oxygen, UV light, and CO2 barriers), antimicrobial properties, and transparency and edibility (for certain applications). The improvement of biomaterials with novel functionalities has been focused for food packaging, but it should also be extended to other packaging applications.
Several advantages have been identified in the use of bio-based materials: lesser amount of energy in the production of biodegradable plastics compared to conventional petroleum-derived plastics; recyclability, compostability, and biodegradability. Therefore, the utilization of packaging materials such as polypropylene, polyethylene and polyvinyl chloride should be restricted to avoid their accumulation into the environment.
In this special issue we will pursue to those articles including the use of nanotechnology; development of bio-based bioplastics; new strategies for compatibilization between different polymer matrices (melt compounding, emulsion polymerization, among others); development of active packaging containing encapsulated natural components; or other related studies.
Title: Food-grade PE recycling: the effect of nanoclays on decontamination efficacy
Authors: François Touchaleaume, Stéphane Peyron, Yannick Laridon
Although PE-based nanocomposites are gaining interest within the food packaging industry for their outstanding functional properties, their end-of-life has been poorly studied. The lack of identification of such materials suggests that they could end-up in the recycling pathway optimized for the decontamination of un-filled PE. The objective of the present work is to understand and quantify the mechanisms involved in the high temperature desorption of surrogates for PE nanocomposites filled with organo-modified montmorillonite (PNC), compared to conventional PE. An original experimental setup was coupled with a modelling approach to identify the two phenomena involved in the decontamination process: diffusion of the surrogate into the bulk and its evaporation at the surface. A sweep of experimental temperatures enabled the determination of diffusion and evaporation parameters for PE and PNC and the activation energies related to the diffusivity among those two materials. The effects of the introduction of clay nanofillers onto the decontamination process have been explained and recommendations for the recycling pathway have been put forward.
Title: Bio-Based Substances from composted bio-waste used for decontamination of wastewater
Authors: Razieh Sadraei1*
1Faculty of Science and Engineering, University of Wolverhampton, Wulfruna Street, Wolverhampton, WV1 1LY, United Kingdom
As widely discussed in the literature, the valorization of urban and/or agricultural biowastes into chemicals (re-entering them into the economic cycle) is becoming an increasingly important issue, which has caught the attention of experts worldwide. In this review, the application of the Bio-Based Substances (BBS) isolated from the compost of urban gardening and park trimming residues, was studied. The non-cost BBS was previously characterized in the literature. Regarding the results, BBS are biological macromolecules with a complex lignin-derived structure containing several functionalities (namely, acid and basic functional groups bonded to aromatic and aliphatic chains. It has mainly acidic behavior and therefore, it is possible to employ it for the surface functionalization of specific oxide inorganic materials in order to produce new hybrid materials. Therefore, the surface character (surface charge) of new hybrid materials has been modified and developed through a very easy and green way for the application in the removal of the pollutant from wastewater.
bio-based substances, green surface functionalization, removal of pollutant, water treatment, wastewater treatment
Title: A NEW PROGRESS IN RANDOM HYDRODYNAMIC LUBRICATION FOR NON-ROTATIONAL CURVILINEAR BIO-SURFACES WITH PHOSPHOLIPID BILAYERS
Authors: Krzysztof Wierzcholski*
Consulting Editor and Research Advisor of the American Biographical Institute NY, University of Economy in Bydgoszcz (WSG-85229-Bydgoszcz) Poland
This paper presents a new progression of mathematical estimation methods of stochastic fluid bio-hydrodynamic lubrication parameters for real arbitrary curvilinear non-rotational living biological surfaces coated with phospholipid bi-layers. Non-rotational cooperating surfaces take the place in various biological friction nods for example in collar bone, blade bone, jump joint, wrist joint.
In particular case the author presents a synthetic, comprehensive estimation of stochastic bio-hydrodynamic lubrication parameters for the cooperating, rotational cartilage bio-surfaces with phospholipid bi-layers occurring in human spherical hip joints, cylindrical elbow joints for rotational cooperating cartilage surfaces.
The paper focuses on a new review of stochastic analytical considerations performed by the author on the ground of measurements of the gap height between two movable bio-surfaces. The gap is restricted between two cooperating biological surfaces. After numerous experimental measurements, it directly follows that we have the symmetrical as well as unsymmetrical random increments and decrements of the gap height. Such changes imply on the hydrodynamic pressure, load-carrying capacity, friction forces, and wear of the cooperating biological surfaces in human friction nods and contact. The main focus of the paper was to demonstrate the influence of variations in the expected values and standard deviation of gap height on the hydrodynamic lubrication parameters occurring during the friction process.
It is very important to notice that the new form of apparent dynamic viscosity of biological in particular case synovial fluid formulated by the authors depends on ultra thin gap height variations.
The new results presented in this paper were obtained taking into account 3D variations in the dynamic viscosity of biological fluid, particularly random variations crosswise the film thickness for non-Newtonian biological fluid properties.
Two movable non-rotational cooperating bio-surfaces, hydrodynamic random lubrication, non-Newtonian physiological bio-fluid, phospholipids bilayer, apparent viscosity depended on the gap height variations, analytical stochastic principles and approximately solutions
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Bio-Based Substances from the Compost of Bio-Waste for Decontamination of Waste Water
Received: 25 April 2020; Published: 01 July 2020; doi: 10.21926/rpm.2003017
A literature survey shows that the valorization of urban and/or agricultural biowastes into chemicals has caught the attention of experts and is gradually becoming quite an important issue. This review presents the application of the Bio-Based Substances (BBS) isolated from the compost of bio-wastes from urban gardening and park trimming resid [...]
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