scholarly journals Microbial Degradation of Synthetic Biopolymers Waste

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1066 ◽  
Author(s):  
Valentina Siracusa
Keyword(s):  
Environmental Impact ◽  
Renewable Resources ◽  
High Performance ◽  
Raw Materials ◽  
Industrial Wastes ◽  
Renewable Raw Materials ◽  
Oilseed Crops ◽  
Petroleum Resources ◽  
Minimal Environmental Impact ◽  
Future Growth

Over the last ten years, the demand of biodegradable polymers has grown at an annual rate of 20–30%. However, the market share is about less than 0.1% of the total plastic production due to their lower performances, higher price and limited legislative attention in respect to the standard materials. The biodegradability as a functional added property is often not completely perceived from the final consumers. However, the opportunity to use renewable resources and to reduce the dependency from petroleum resources could become an incentive to accelerate their future growth. Renewable raw materials, coming from industrial wastes such as oilseed crops, starch from cereals and potatoes, cellulose from straw and wood, etc., can be converted into chemical intermediates and polymers, in order to substitute fossil fuel feedstock. The introduction of these new products could represent a significant contribution to sustainable development. However, the use of renewable resources and the production of the bioplastics are no longer a guarantee for a minimal environmental impact. The production process as well as their technical performances and their ultimate disposal has to be carefully considered. Bioplastics are generally biodegradable, but the diffusion of the composting technology is a prerequisite for their development. Efforts are required at industry level in order to develop less expensive and high performance products, with minimal environmental impact technologies.

scholarly journals Analysis of Selected Building Constructions Used in Industrial Construction in Terms of Sustainability Benefits

2018 ◽  
Vol 10 (12) ◽  
pp. 4394 ◽  
Author(s):  
Jozef Švajlenka ◽  
Mária Kozlovská ◽  
Terézia Pošiváková
Keyword(s):  
Environmental Impact ◽  
Primary Production ◽  
Raw Materials ◽  
Industrial Building ◽  
Industrial Construction ◽  
Renewable Raw Materials ◽  
The Past ◽  
Harmful Emissions ◽  
Cradle To Gate ◽  
The Right

Enormous development of technology over the past two centuries has been associated with a considerable drawdown of non-renewable raw materials and an increase in the amount of harmful emissions. Thus, building direction in the field of construction implies a significant implementation of sustainability. The preference for environmentally friendly technology solutions is the right way to meet the sustainability trend. The main aim of this study was to analyze and verify selected construction systems of buildings designed for agricultural primary production in terms of their environmental impacts. The supporting construction systems of the comparative design variants was designed from a variety of material bases (concrete, steel, and wood). To evaluate environmental construction systems, the LCA methodology in mode “Cradle to Gate” was used. Parameters of sustainability related to the environmental impact were analyzed. These results could be a useful tool for the evaluation and comparison to an appropriate choice of the design option for an industrial building designed for agricultural primary production in terms of environmental impact.

scholarly journals Synthetic Slag Production Method Based on a Solid Waste Mix Vitrification for the Manufacturing of Slag-Cement

Materials ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 208 ◽  
Author(s):  
Mónica Rodríguez-Galán ◽  
Bernabé Alonso-Fariñas ◽  
Francisco Baena-Moreno ◽  
Carlos Leiva ◽  
Benito Navarrete ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Raw Materials ◽  
Production Method ◽  
Cement Industry ◽  
Industrial Wastes ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Slag Production ◽  
Novel Material ◽  
Furnace Slag

Herein an innovative process to develop a potential vitreous material with cementing properties is proposed. This process paves a production path through melting industrial waste and subsequently cooling the casting in water. The idea erases the need to reduce the environmental impact of the cement industry in terms of natural resources consumption as well as the re-utilization of abandoned wastes from other industries. The recycled industrial wastes were selected according to the amount of waste produced in the industrial field and its suitable chemical composition, such as construction and demolition waste and/or shells from shellfish. As a main result, the mechanical properties showed by our novel material were worse than those reported by blast furnace slag (25–28 MPa for two different proportions) for seven days and better (43–52 MPa for two different proportions) for 28 days. The rest of the properties evaluated were in agreement with the standards’ requirements. Hence, this novel process would help to minimize the environmental impact of these wastes at the same time that their use in the cement industry would reduce the consumption of raw materials.

scholarly journals Production of environmentally friendly aerated concrete with required construction and operational properties

2018 ◽  
Vol 143 ◽  
pp. 02010 ◽  
Author(s):  
Evgeniya Tkach ◽  
Vladimir Solovyov ◽  
Semen Tkach
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Building Materials ◽  
Raw Materials ◽  
Environmentally Friendly ◽  
Industrial Wastes ◽  
Hazard Class ◽  
Concrete Production ◽  
Aerated Concrete ◽  
The Impact

The purpose of these studies is to justify the feasibility of recycling different types of industrial waste instead of conventional expensive raw materials in production of environmentally friendly aerated concrete with required construction and operational properties. The impact of wastes from various industries on the environmental condition of affected areas, as well as the results of their environmental assessment were analyzed to determine whether these wastes could be used in production of high-performance building materials. The assessment of industrial wastes in aerated concrete production suggests that industrial wastes of hazard class IV can be recycled to produce aerated concrete. An environmentally friendly method for large-scale waste recycling, including a two-step environmentally sustainable mechanism, was developed. The basic quality indicators of the modified aerated concrete proved that the environmental safety could be enhanced by strengthening the structure, increasing its uniformity and improving thermal insulation properties. The modified non-autoclaved aerated concrete products with improved physical and operational properties were developed. They have the following properties: density – D700; class of concrete – B3.5; thermal transmittance coefficient – 0.143 W/(m·°C); frost resistance – F75.

scholarly journals Waste-Based Pigments for Application in Ceramic Glazes and Stoneware Bodies

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3396 ◽  
Author(s):  
Jorge Carneiro ◽  
David Maria Tobaldi ◽  
Marinélia Neto Capela ◽  
Maria Paula Seabra ◽  
João António Labrincha
Keyword(s):  
Thermal Stability ◽  
Environmental Impact ◽  
Raw Materials ◽  
Ceramic Materials ◽  
Industrial Wastes ◽  
Ceramic Pigments ◽  
Thermally Stable ◽  
Ceramic Substrates ◽  
Natural Stones

The use of wastes, some of them hazards, as raw materials of ceramic pigments has been a way to diminish their environmental impact, to economically valorize them, and to face the depletion of virgin raw materials. In this work were prepared pigments having in their composition only industrial wastes: Cr/Ni electroplating (ES), and sludges from the cutting of natural stones—marble (MS) and granite (GS). The prepared mixtures were calcined at three temperatures (1100, 1200, and 1300 °C) and the obtained powders were characterized by XRD and UV-vis. Their coloring strength and thermal stability were assessed by adding them to different ceramic substrates: glazes (transparent bright and opaque matte) and a stoneware paste. The CIEL*a*b* coordinates of the fired materials were measured. The developed pigments are thermally stable and exhibit good tinting power, originating nicely colored and defect-free ceramic materials.

Characterization of Cellulosic Fibres Properties for their Using in Composites

2015 ◽  
Vol 244 ◽  
pp. 146-152 ◽  
Author(s):  
Viola Hospodarova ◽  
Eva Singovszka ◽  
Nadežda Števulová
Keyword(s):  
Renewable Resources ◽  
Building Materials ◽  
Raw Materials ◽  
Strength Parameters ◽  
Cellulose Fibres ◽  
Renewable Raw Materials ◽  
Material Recycling ◽  
Recycled Fibres ◽  
Cellulosic Fibres

Nowadays, the material recycling is growing trend in development of building materials and therefore using of secondary raw materials for production of new building materials. Transition from application non-renewable sources of raw materials to renewable raw materials in terms of sustainable composite is required. Renewable raw materials include organic sources of raw materials coming from natural plant fibres. This material is used to contribute environmental protection and to save non-renewable resources of raw materials. Wood fibres and cellulose fibres made from waste paper were selected for reinforcing cement-based materials. Application of cellulosic fibres into composites depends on their properties. Therefore, this paper is aimed to study of morphology and properties of cellulosic fibres. The comparison of strength parameters of 28 days hardened composites with 5% adding bleached wood and unbleached recycled fibres with those of reference composite without fibres showed that the values of compressive strength of fibrous cement based specimens were lower by 17 to 29 %.

scholarly journals THE INFLUENCE OF BIO-BASED CHAIN EXTENDER ON THE POLYURETHANE PROPERTIES

2017 ◽  
Vol 8 (2) ◽  
Author(s):  
Vladan Mićić ◽  
Milojko Jokić ◽  
Milovan Jotanović ◽  
Ivan Ristić ◽  
Suzana Cakić ◽  
...  
Keyword(s):  
Renewable Resources ◽  
Raw Materials ◽  
Chain Extender ◽  
Hexamethylene Diisocyanate ◽  
Scanning Calorimetry ◽  
Polyurethane Elastomers ◽  
Renewable Raw Materials ◽  
Stage Process ◽  
Poly Propylene

The development of polymers obtained from renewable raw materials is important because it is known that the fossil sources will be depleted in the future. Due to this fact, the possibilities for the synthesis of polyurethanes based on renewable resources increases. This work analyzes the properties of polyurethane materials obtained from the renewable resources. Polyurethane elastomers were prepared by a two stage process in solution, which involved the synthesis of the pre-polymer and synthesis of the polyurethane elastomer. As a polyol component, poly (propylene glycol) was used. Isophorone-diisocyanate and hexamethylene diisocyanate were employed as isocyanate components. For some samples, petrochemically obtained chain extender, butanediol, was replaced by biobased product isosorbide. Characterization of polyurethane materials was carried out by infrared spectroscopy with Fourier transformation, thermogravimetric analysis and differential scanning calorimetry. The properties of synthesized polyurethane materials were improved by adding the nanoparticles in various proportions.

scholarly journals Diamine Biosynthesis: Research Progress and Application Prospects

2020 ◽  
Vol 86 (23) ◽  
Author(s):  
Li Wang ◽  
Guohui Li ◽  
Yu Deng
Keyword(s):  
Escherichia Coli ◽  
Sustainable Development ◽  
High Performance ◽  
Raw Materials ◽  
Research Progress ◽  
Renewable Raw Materials ◽  
Content Type ◽  
Challenges And Opportunities ◽  
Plastics Industry ◽  
Application Prospects

ABSTRACT Diamines are important monomers for polyamide plastics; they include 1,3-diaminopropane, 1,4-diaminobutane, 1,5-diaminopentane, and 1,6-diaminohexane, among others. With increasing attention on environmental problems and green sustainable development, utilizing renewable raw materials for the synthesis of diamines is crucial for the establishment of a sustainable plastics industry. Recently, high-performance microbial factories, such as Escherichia coli and Corynebacterium glutamicum, have been widely used in the production of diamines. In particular, several synthetic pathways of 1,6-diaminohexane have been proposed based on glutamate or adipic acid. Here, we reviewed approaches for the biosynthesis of diamines, including metabolic engineering and biocatalysis, and the application of bio-based diamines in nylon materials. The related challenges and opportunities in the development of renewable bio-based diamines and nylon materials are also discussed.

scholarly journals Biopolymers: Impact of Polymers that Replace Conventional Plastics, An Option for a Sustainable Future

2021 ◽  
Vol 10 (9) ◽  
pp. 492-497
Author(s):  
E. Andrango J. E. Apugllon ◽  
A. D Durán P. J. Nazareno ◽  
Carlos Jácome
Keyword(s):  
Quality Control ◽  
Production Process ◽  
Solid Waste ◽  
Renewable Resources ◽  
Raw Materials ◽  
Biodegradable Plastics ◽  
Renewable Raw Materials ◽  
Sustainable Future ◽  
Sanitary Landfills

The work carried out focuses on the importance and characteristics of bioplastics, which is why the bibliographic sources consulted recall that the plastic manufactured from biopolymers has been increasing due to its practicality and in supporting the reduction of pollution of solid waste worldwide. Viable alternatives are currently being sought to replace packaging and coatings made from non-renewable raw materials, as these cause millions of tons of waste each year, damaging the environment. The production process of biodegradable plastics has a certain resemblance to the production of conventional plastics, it consists of a mixer of raw materials with additional components, for a subsequent blowing and sealing, passing through a quality control. One of the problems with conventional plastics is that they are manufactured from raw materials obtained from non-renewable resources, which each day becomes scarcer and therefore more expensive. Also the problem of persistence in the medium for very long times, which cause them to occupy space in sanitary landfills, which are causing problems in the country due to lack of space.

Sign in / Sign up

Export Citation Format

Share Document