Nanoparticle fillers obtained from wood processing wastes for reinforcing of paper

2016 ◽  
Author(s):  
Marianna Laka ◽  
Laura Vikele ◽  
Linda Rozenberga ◽  
Sarmite Janceva
Keyword(s):  
Wood Processing ◽  
Processing Wastes

scholarly journals Production of nanoporous carbons from wood processing wastes and their use in supercapacitors and CO2 capture

2012 ◽  
Vol 46 ◽  
pp. 145-154 ◽  
Author(s):  
G. Dobele ◽  
T. Dizhbite ◽  
M.V. Gil ◽  
A. Volperts ◽  
T.A. Centeno
Keyword(s):  
Co2 Capture ◽  
Nanoporous Carbons ◽  
Wood Processing ◽  
Processing Wastes

The effect of industrial effluent from pulp and paper mills on the marine benthic environment

1972 ◽  
Vol 180 (1061) ◽  
pp. 469-485 ◽  
Keyword(s):  
Industrial Effluent ◽  
Organic Pollution ◽  
Moderate Increase ◽  
Organic Input ◽  
Paper Mills ◽  
Wood Processing ◽  
Benthic Environment ◽  
Processing Wastes ◽  
Marine Areas ◽  
Natural Leaf

The types of effluent discharged by wood-processing industries and their effects on the benthic environment are described. A brief summary of the results of the Lochs Linnhe-Eil survey 1964-70 is given. Populations of the molluscs Corbula , Thyasira and Myrtea have increased in most areas, and appear to be favoured by a moderate increase in the organic input to the system. Corbula dominates in the shallower polyhaline areas, and Myrtea in the deeper mixoeuhaline areas. On sediments with a high natural leaf litter content a low diversity fauna occurs, dominated by the annelids Cirriformia , Peloscolex , Capitella and Staurocephalus , and the crustacean Idotea . The predominance of this kind of fauna has increased in its area of occurrence in recent years. Comparisons of these faunal distributions and changes with those found in surveys in other marine areas affected by wood-processing wastes and other types of organic effluents show considerable similarities in the faunal changes occurring under increased organic loading. The utility of ‘indicator’ species in the assessment of organic pollution is briefly discussed. The need for detailed information on the ecological and physiological reasons underlying the varied faunal successions which occur under conditions of pollutional stress is emphasized.

Possibilités, initiatives et calendrier de la mise en valeur des bois feuillus en Suisse au cours des décennies à venir | Possibilities, Initiatives and Timing for an Economic Development of Hardwood Timber in Switzerland for the Coming Decades

2000 ◽  
Vol 151 (7) ◽  
pp. 262-267
Author(s):  
Peter Hofer
Keyword(s):  
Mechanical Properties ◽  
Economic Development ◽  
Working Capacity ◽  
Wood Processing ◽  
Potential Market

Despite the fact that NFI 2 clearly attests that 35% of Swiss forests' increments are produced by hardwoods, only 28% of that volume are harvested yearly. A mere eight percent of the working capacity of Swiss sawmills is used on indigenous hardwoods;imported logs take up an additional 4%. More than 50% of the hardwood sawlogs exploited in Swiss forests is thus exported without any processing. Studies realised by «Forum for wood» have shown that an important potential market exists for local timber and especially for hardwood products. This is due not only to its aesthetic qualities, but also to the mechanical properties which allow uses in construction. The decisive factors for better marketing opportunities for hardwood are mainly found in the wood processing industries. Only a voluntary marketing promotion conducted by the whole woodworking chain can bring about a significant breakthrough for hardwoods.

Das waldreiche obere Theresiental (Transkarpatien, Ukraine) – geografisch-ökologische und sozioökonomische Beschreibung | The forest-rich upper Theresian Valley (Transcarpathia, Ukraine): a geographic-ecological and socio-economical description

2007 ◽  
Vol 158 (1-2) ◽  
pp. 14-21
Author(s):  
Vasyl Sabadosh ◽  
Oleg Suprunenko
Keyword(s):  
Forest Management ◽  
High Water ◽  
The State ◽  
Water Levels ◽  
Private Companies ◽  
Foreign Investors ◽  
Wood Processing ◽  
Job Opportunities ◽  
Orange Revolution

The upper Theresian Valley lies along the southwest-facing ridge of the Ukrainian Carpathians. Despite expansive forestation high water levels are frequent. The forest belongs to the state and is centrally administrated. Felling is sometimes outsourced to private companies and private companies have also been founded to process the timber. Job opportunities have become fewer and illegal work is increasing. A new democratic awareness has emerged since the «Orange Revolution» in 2004. With foreign investors, however, new risks emerge. The authors recommend giving monies from forest management to the communities, the founding of new wood processing enterprises and more transparent information.

Resources provision of woodworking industries in Ukraine: cross-national and inter-regional comparisons

2019 ◽  
pp. 145-154
Author(s):  
Svitlana Ishchuk ◽  
Lyubomyr Sozanskyy
Keyword(s):  
Raw Materials ◽  
Dynamic Assessment ◽  
Timber Harvesting ◽  
Necessary Condition ◽  
The European Union ◽  
Environmental Aspects ◽  
Fuel Wood ◽  
Significant Deterioration ◽  
The Czech Republic ◽  
Wood Processing

Sufficient supply of woodworking with raw materials while preserving the ecology and rational use of wood is a necessary condition for the functioning of the woodworking industry as one of the key segments of the national economy. The issue is of particular importance given the deepening of world integration processes and the introduction of a moratorium on timber exports from Ukraine. It actualizes the study of the state and dynamics of the formation of raw materials potential of domestic woodworks. The purpose of the article is a structural and dynamic assessment of the economic and environmental aspects of formation of the resource potential of Ukrainian woodworks in comparison with the countries of the European Union, as well as in the regional section by types of wood. In the structure of merchantable wood harvested in Ukraine, fuel wood share increased by 4.3 pp. during 2011-2016, whereas in 2017 it increased by 3.8 pp. compared to 2016 and amounted to 61.4%. Unlike in Ukraine, in the vast majority of EU countries business timber is the basis of the structure of harvested merchantable timber. Thus, in the neighboring countries with similar forest landscape – Poland and the Czech Republic – the share of fuel wood in 2017 was 11.6% and 12.3%, in Slovakia – only 6.3%, and in the EU as a whole – 23. 2%. Hence, the significant deterioration of the structure of the harvested merchantable timber in Ukraine can be interpreted as a threat to environmental, and therefore to national security. On the other hand, the results of the assessments revealed an increase in the volume of commercial timber harvesting in Ukraine (in 18 regions) in 2018, as well as in the level of forest reproduction in the leading regions from the harvesting of merchantable timber (Zhytomyr, Kyiv and Rivne regions) and a decrease in the death rate. The restoration of the logical patterns between the dynamics of the loss of stands and the harvesting of commercial and fuel wood are signs of the beginning of positive tendencies in ensuring the preservation and rationalization of raw potential of domestic woodworks and, at the same time, improving the conditions for deepening the level of wood processing. Further authors’ research in this area will be devoted to the search for effective forms of wood industry development in Ukraine, in particular in the Western region.

Production of colored bi-layered bricks from stone processing wastes: Structural and spectroscopic characterization

2021 ◽  
Vol 278 ◽  
pp. 122339
Author(s):  
Vivek Gupta ◽  
Devesh Kumar Pathak ◽  
Rajesh Kumar ◽  
Ankur Miglani ◽  
Salman Siddique ◽  
...  
Keyword(s):  
Spectroscopic Characterization ◽  
Processing Wastes

scholarly journals Increasing the Strength of the Glue Line in the Production of Thermally Modified Wood Paneling

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 253
Author(s):  
Ruslan Rushanovich Safin ◽  
Aigul Ravilevna Shaikhutdinova ◽  
Ruslan Khasanshin ◽  
Shamil Mukhametzyanov ◽  
Albina Safina
Keyword(s):  
Wood Products ◽  
Ultraviolet Rays ◽  
Surface Activation ◽  
Wood Block ◽  
Two Stage ◽  
Adhesion Properties ◽  
Wood Processing ◽  
Ultraviolet Treatment ◽  
Thermally Modified Wood ◽  
Modified Wood

This work is devoted to the study of the effect of ultraviolet rays for the surface activation of pine wood thermally modified at temperatures of 180−240 °C in order to increase the surface roughness, enhance the wettability of thermal wood and the adhesive strength of the glue in the production of wood block furniture panels. Studies were carried out to measure the contact angle of wettability of thermally modified wood samples of pine, as a result of which it was determined that the ultraviolet treatment process contributes to an increase in the adhesion properties of the surface layer of thermally modified wood by more than 13% due to the reactivity of ultraviolet rays to oxidize and degrade ligno-containing wood products. At the same time, the most active process of surface activation takes place during 60 min of ultraviolet irradiation of wood with a total irradiation of at least 125 W/cm2. It was revealed that the combined effect of two-stage wood processing, including preliminary volumetric thermal modification followed by surface ultraviolet treatment, causes an increase in the moisture resistance of glued wood products by 24%. So, if the strength of the glue seam when gluing natural wood samples after boiling decreased by 46%, then the samples that underwent two-stage processing showed a decrease only by 22%. In connection with the results obtained, an improved technology for the production of furniture boards for the manufacture of moisture-resistant wood products is proposed.

scholarly journals Effect of Furfurylation on Hierarchical Porous Structure of Poplar Wood

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 32
Author(s):  
Xiaoshuang Shen ◽  
Pan Jiang ◽  
Dengkang Guo ◽  
Gaiyun Li ◽  
Fuxiang Chu ◽  
...  
Keyword(s):  
Porous Structure ◽  
Value Added ◽  
Untreated Wood ◽  
Weight Percent Gain ◽  
Wood Properties ◽  
Weight Percent ◽  
Acoustic Properties ◽  
Hierarchical Porous Structure ◽  
Wood Processing ◽  
Hierarchical Porous

Some wood properties (such as permeability and acoustic properties) are closely related to its hierarchical porous structure, which is responsible for its potential applications. In this study, the effect of wood impregnation with furfuryl alcohol on its hierarchical porous structure was investigated by microscopy, mercury intrusion porosimetry and nuclear magnetic resonance cryoporometry. Results indicated decreasing lumina diameters and increasing cell wall thickness of various cells after modification. These alterations became serious with enhancing weight percent gain (WPG). Some perforations and pits were also occluded. Compared with those of untreated wood, the porosity and pore volume of two furfurylated woods decreased at most of the pore diameters, which became more remarkable with raising WPG. The majority of pore sizes (diameters of 1000~100,000 nm and 10~80 nm) of macrospores and micro-mesopores of two furfurylated woods were the same as those of untreated wood. This work could offer thorough knowledge of the hierarchical porous structure of impregnatedly modified wood and pore-related properties, thereby providing guidance for subsequent wood processing and value-added applications.

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