scholarly journals Cascading Recycling of Wood Waste: A Review

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1752
Author(s):  
Arnaud Besserer ◽  
Sarah Troilo ◽  
Pierre Girods ◽  
Yann Rogaume ◽  
Nicolas Brosse
Keyword(s):  
Renewable Resource ◽  
Waste Recycling ◽  
Chemical Processes ◽  
Wood Waste ◽  
Raw Material ◽  
New Materials ◽  
Waste Wood ◽  
Physical Chemical ◽  
Wood Particles ◽  
Bioremediation Processes

Wood is an increasingly demanded renewable resource and an important raw material for construction and materials. In addition, new consumption habits are leading to the production of ever greater volumes of waste wood, which constitutes a feedstock that can be mobilized for the cascade production of new materials such as particleboard. However, current legislation and wood waste recycling processes need to be improved in order to maximize the volumes that can be reused and to upgrade the properties of the recycled wood. This review describes wood waste flows and volumes available in Europe, the current French and European legislation, and the innovations under development in this field: innovative automated sorting techniques, physical-chemical processes for cleaning residual glue from the surface of wood particles, cleaning of MDF, and bioremediation processes for cleaning hazardous wood contaminated by heavy metals or creosote.

Recycling Waste Wood of Construction

2016 ◽  
Vol 871 ◽  
pp. 126-131 ◽  
Author(s):  
Larisa Grigorieva ◽  
Pavel Oleinik
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Wood Waste ◽  
Raw Material ◽  
Polymer Composite Materials ◽  
Comparative Characteristic ◽  
Complicated Shape ◽  
Waste Wood ◽  
Wood Polymer ◽  
Wood Polymer Composite

The article considers contemporary methods and especially recycling of wood waste. The volume of wood waste is constantly growing due to the increase in the number of buildings subject to demolition or dismantling, reconstruction and repair works. The article contains the main requirements to the raw material derived from waste. Advantages of products made from wood-polymer composite materials on physic mechanical parameters. The comparative characteristic of cost for the production of wood-polymer plastic. It is noted that production made from wood polymer composite materials has unlimited product range, including boards, various profiled molded and moulded details with complicated shape (the board for the floor, skirting board, baguette, etc).

Characterization of Waste from the Production of Titanium Dioxide (UOW) for Reuse in Other Processes

2021 ◽  
Vol 47 (3) ◽  
pp. 590-600
Author(s):  
José da Silva Andrade Neto ◽  
Nilson Santana de Amorim Júnior ◽  
Vitor Souza Santos ◽  
Bruna Bueno Mariani ◽  
Diana Dayse Mariano de Albuquerque ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Environmental Issues ◽  
Ceramic Materials ◽  
Raw Material ◽  
Industrial Processes ◽  
New Materials ◽  
Physical Chemical ◽  
Expected Performance ◽  
Starting Point

The reuse of waste generated in several industrial processes through the development of new materials for civil construction has been shown to be a viable alternative to meet environmental issues. New products can be developed that satisfy the expected performance and durability requirements while including this material. The main starting point for the development of projects that seek the safe use of these wastes is an extensive characterization. Unreacted Ore Waste (UOW), a waste generated during the production of titanium dioxide (TiO2), was characterized in terms of its physical, chemical, mineralogical, environmental, and radiological, as well as thermal properties. There is currently no effective reuse plan for UOW and it is disposed of in industrial landfills. From the characterization, possible routes for using UOW are identified, such as its addition to mortars with photocatalytic potential, and its use as a raw material in the production of Portland cement and ceramic materials.

Research of recycling process of wood processing industry wastes

2020 ◽  
Vol 04 (05) ◽  
pp. 33-36
Author(s):  
Afet Anvar Khalilova ◽  
◽  
Dilara Ilham Mammadova ◽  
Keyword(s):  
Western Europe ◽  
Waste Recycling ◽  
Wood Waste ◽  
Ecological Problem ◽  
Recycling Process ◽  
Waste Wood ◽  
Processing Industry ◽  
Wood Processing ◽  
Global Demand ◽  
Industry Needs

An analysis of the literature and statistics suggests that in Western Europe and many other countries, people have turned to clean fuels and waste-free production in the last decade. With the active support of governments and subsidies to support the work, commercial projects based on wood waste recycling are expected to develop more actively over time.Developing trends in the West always or almost always seem to be ambassadors of trade trends. For this reason, they are worth paying attention to in our country. The growing global demand for environmentally friendly and affordable energy sources must be taken into account. The wood processing industry needs a wider budget and more attention to the recycling process. Key words: Waste, ecological problem, solid waste, wood waste, wood processing

scholarly journals PHYSICAL AND CHEMICAL PROCESSES OCCURRING IN THE GRANULATED PHOSPHORUS SLAG DUMPS

2020 ◽  
Vol 2 (440) ◽  
pp. 47-55
Author(s):  
Z.A. Estemesov ◽  
P.I. Sadykov ◽  
A.V. Barvinov ◽  
N. B. Sarsenbaev ◽  
M.Z. Estemesov ◽  
...  
Keyword(s):  
Construction Industry ◽  
Carbon Oxide ◽  
Chemical Processes ◽  
Raw Material ◽  
Anthropogenic Effect ◽  
Disposal Area ◽  
Physical Chemical ◽  
Hazardous Gases ◽  
Physical And Chemical ◽  
Ash Disposal

One of the most dangerous man-made mineral formations located in the territory of Kazakhstan is disposal areas for granulated phosphorus slag, since its shells contain initially the dangerous gases such as PH3, H2S, HF, etc. Permanent sources of such gases are also Ca3P2 (intrinsically poisonous gas), CaS and CaF2. In the structures of phosphorous ash disposal areas, the chemical and physical-chemical processes contain initially gases, which may be in different modifications. For example: • Phosphene (PH3) in the form: PH3→P2O5→HPO3→H3PO4; • Hydrogen sulfide (H2S): H2S→H2SO3→ H2SO4; • Hydrogen fluoride and silicon tetrafluoride: HF→SiF4→H2SiF6→H2SiO3; • Carbon oxide (СО): СО→СО2→СОСl2. Such chemical processes intensify greatly the anthropogenic effect of phosphorous ash disposal areas on the environment – biogeocoenosis. In addition to the processes related to gas components, in the phosphorous ash disposal areas, the hydration processes occur as a result of interaction of slag with water. Thereat, sub-microcrystalline CSH(I) and calcium are generated. Depth of slag hydration reaches 1…3 μm. Such processes form a thin layer on the surface of slag particles resulting in linking of separate grains into a whole. Therefore, the surface of phosphorous ash disposal areas has the certain strength with cracks, through which water, air, snow, etc. are penetrating into the disposal area. It is evident that granulated phosphorus slag in the form of disposal areas has very adverse impact on the biogeocoenosis, causing the pressing need for their disposal; moreover, such slags are valuable raw material for the construction industry and agriculture only after their decontamination from dangerous gases. Keywords. Granular phosphorus slag, dumps, hazardous gases, chemical reactions.

scholarly journals Hybrid Manufacturing based on the combination of Mechanical and Electro Physical–Chemical Processes

Procedia CIRP ◽  
2020 ◽  
Vol 95 ◽  
pp. 649-661
Author(s):  
Bert Lauwers ◽  
Nataliia Chernovol ◽  
Benjamin Peeters ◽  
Dries Van Camp ◽  
Thomas Van Riel ◽  
...  
Keyword(s):  
Chemical Processes ◽  
Hybrid Manufacturing ◽  
Physical Chemical

scholarly journals INVESTIGATION OF SOLID PARTICLES UNDER THE ACTION OF AN ACOUSTIC FIELD / SKYSTYJE ESANČIŲ KIETŲJŲ DALELIŲ SĄVEIKOS AKUSTINIAME LAUKE TYRIMAS

2013 ◽  
Vol 5 (6) ◽  
pp. 655-658
Author(s):  
Egidijus Mykolaitis ◽  
Andrius Styra ◽  
Vladas Vekteris
Keyword(s):  
Water Treatment ◽  
Ground Water ◽  
Acoustic Field ◽  
Chemical Industry ◽  
Iron Concentration ◽  
Chemical Processes ◽  
Solid Particles ◽  
Common Elements ◽  
Physical Chemical

Iron is one of the most common elements in ground water. Bythe HN 24:2003 iron concentration in water can‘t be higher than200 μg/l. Water treatment with an acoustic field is a very relevanttopic. Acoustic field is widely used in industrion, medicine,chemical industry and manufacturing. When water is affectedby ultrasound, physical-chemical processes begin. Ultrasoundvibrations lead to dispersion, degasation and coagulation. Ironparticles connect to each other when distance between them istwo times bigger then their own radius. R = 2R. And if thisprocess continues particles connect one by one. In this article teststand and methodics using ultrasonic piezoceramic are shown. Santrauka Geležis – dažniausiai požeminiuose vandenyse aptinkama priemaiša, kuri prastina geriamojo vandens savybes, todėl būtina bendrosios geležies koncentraciją sumažinti iki 0,2 mg/l. Vienas iš geležies šalinimo būdu yra paremtas ultragarso panaudojimu. Straipsnyje glaustai aptarti bendrosios geležies būviai vandenyje, jos šalinimo metodai ir pateikta eksperimentinė metodika. Eksperimentas atliktas naudojant skirtingų dažnių garso bangas nuo 8 kHz iki 20 kHz diapazone. Akustinio lauko daromai įtakai nustatyti, naudojant skirtingų dažnių garso bangas, buvo panaudoti trys skirtingi vandens debitai. Iš gautų rezultatų suformuluotos išvados.

Possible Causes in Breaking of Dental Implants Research

2017 ◽  
Vol 907 ◽  
pp. 104-118
Author(s):  
Maria Stoicănescu ◽  
Eliza Buzamet ◽  
Dragos Vladimir Budei ◽  
Valentin Craciun ◽  
Roxana Budei ◽  
...  
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Scientific Literature ◽  
Surface Characteristics ◽  
Raw Material ◽  
New Materials ◽  
Materials Used ◽  
Type Of Failure ◽  
First Time ◽  
Consequent Increase

Dental implants are becoming increasingly used in current dental practice. This increased demand has motivated manufacturers to develop varieties of product through design, but also looking for new materials used to improve surface characteristics in order to obtain a better osseointegration. But the increase in the use of implants goes to a consequent increase in the number of failures. These failures are caused either by treatment complications (peri-implantitis), by fatigue breakage under mechanical over-stress, by defective raw material, or due to errors during the insertion procedures. Although they are rare, these complications are serious in dentistry. Before to market a dental implant to clinical practitioners, the product is validated among other determinations in number of biocompatibility research. Raw material issues, details about its structure and properties are less published by the scientific literature, but all this are subject of a carefully analysis of the producers. Breaking of dental implants during surgical procedures, during the prosthetic procedures or during use (chewing, bruxism, accidents, etc.), is the second most common cause of loss of an implant after consecutive peri-implantitis rejection. Although the frequency of this type of failure for a dental implant is much smaller than those caused by the peri-implantitis, a detailed study of broken implants can explain possible causes. The use of scanning electron microscopy (SEM) in the study of the cleave areas explain the production mechanism of cleavages, starting from micro-fissures in the alloy used for the production of dental implants. These micro-fissures in weak areas of the implant (anti-rotational corners of the polygons, etc.) could generate a serious risk of cleavage first time when a higher force is applied.

Rapid microwave-assisted acid extraction of southern pine waste wood to remove metals from chromated copper arsenate (CCA) treatment

Holzforschung ◽  
2013 ◽  
Vol 67 (3) ◽  
pp. 285-290 ◽  
Author(s):  
Chung Y. Hse ◽  
Todd F. Shupe ◽  
Bin Yu
Keyword(s):  
Recovery Rate ◽  
Chromated Copper Arsenate ◽  
Copper Extraction ◽  
Acid Extraction ◽  
Southern Pine ◽  
Waste Wood ◽  
Total Recovery ◽  
Wood Particles ◽  
One Step ◽  
Copper Arsenate

Abstract Recovery of metals from chromated copper arsenate (CCA)-treated southern pine wood particles was investigated by extraction in a microwave reactor with binary combinations of acetic acid (AA), oxalic acid (OxA), and phosphoric acid (PhA). Use of OxA was not successful, as insoluble copper oxalate complexes impeded copper removal. The combination of OxA and AA also had adverse effects on copper extraction. In contrast, the combination of AA and PhA enhanced the chromium recovery rate. The highest recovery rate of metals could be achieved with a mixture of 2.75% PhA and 0.5% AA at 130°C for 10 min in the microwave oven. The total recovery rate approached 100% for arsenic, 96.7% for chromium, and 98.6% for copper in a one-step process.

Material Properties and Design Aspects of Folding Bicycle Frame

2011 ◽  
Vol 264-265 ◽  
pp. 777-782 ◽  
Author(s):  
M.A. Maleque ◽  
M.S. Hossain ◽  
S. Dyuti
Keyword(s):  
Material Properties ◽  
Raw Material ◽  
New Materials ◽  
Materials Properties ◽  
Advantages And Disadvantages ◽  
Bicycle Frame ◽  
Successful Design ◽  
Future Direction ◽  
The Relationship ◽  
Comprehensive Study

successful design of folding bicycle should take into account the function, material properties, and fabrication process. There are some other factors that should be considered in anticipating the behavior of materials for folding bicycle. In order to understand the relationship between material properties and design of a folding bicycle and also for the future direction in new materials with new design, a comprehensive study on the design under different conditions are essential. Therefore, a systematic study on the relationship between material properties and design for folding bicycle has been performed. The advantages and disadvantages matrix between conventional bicycle and folding bicycle is presented for better understanding of the materials properties and design. It was found that the materials properties of the folding bicycle frame such as fatigue and tensile strength are the important properties for the better performance of the frame. The relationship between materials properties and design is not straight forward because the behavior of the material in the finished product could be different from that of the raw material. The swing hinge technique could be a better technique in the design for the folding bicycle frame.

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