Готові списки джерел за темами / Chromate Copper Boron

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Добірка наукової літератури з теми "Chromate Copper Boron"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 22 червня 2025

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Статті в журналах з теми "Chromate Copper Boron"

Muslich, Mohammad, and Nurwati Hadjib. "THE POSSIBILITY OF USING TIMBER FROM PLANTATION FOREST TREATED WITH PLASTIC AND CCB FOR MARINE CONSTRUCTION." JOURNAL OF FORESTRY RESEARCH 5, no. 1 (2008): 65–72. https://doi.org/10.20886/ijfr.2008.5.1.65-72.

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  Recently, timber  estate or plantation forest plays an important role on wooden based industries.  However, the  plantation timber  quality is relatively low.  Some treatments  have been developed to improve  its low quality, such as preservation with CCB (Chromate Copper Boron) and impregnation with plastic compounds. This study is to compare the durability of timber treated with  plastic and CCB,  non-treated from plantation forest timber  as well  as from natural  forest. The plantation timber  studied were  jeungjing  (Paraserianthes falcataria), damar  (Agathis sp.), pinus  (Pinus merkusii), and rubberwood (Hevea brasilliensis). Non-treated timbers that usually used for marine construction were ulin (Eusideroxylon zwageri), jati/teak  (Tectona grandis), laban (Vitex pubescens) and merbau  (Instia bijuga). After  6 and 12 months,  the results showed that CCB  preserved  timber  were  more durable  than plastic  impregnated timber  and non- treated timber. Wood samples were mostly attacked by marine borer organisms from the family of  Pholadidae  and Teredinidae. The experiment results revealed the possibility of using those plantation forest timber species for marine construction purposes.

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Shanu, SA, AK Das, MM Rahman, and M. Ashaduzzaman. "Effect of Chromate-Copper-Boron preservative treatment on physical and mechanical properties of Raj koroi (Albizia richardiana) wood." Bangladesh Journal of Scientific and Industrial Research 50, no. 3 (2015): 189–92. http://dx.doi.org/10.3329/bjsir.v50i3.25583.

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This experiment was carried out to analyze the effects of CCB (chromate-copper-boron) preservative treatment on physical and mechanical properties of Albizia richardiana wood using dipping method. Retention of preservative was maximum at 8% concentration of the preservatives. Based on the retention at this concentration, the physical and mechanical properties of the treated wood were examined. The density of untreated A. richardiana wood was 521 kg/m3. It changed to 542 kg/m3 on treatment. This increase in density by 2.30% for treated wood was significant. On the other hand, modulus of rupture (MOR) increased significantly from 93 to 107 N/mm2 on treatment of the wood. The modulus of elasticity (MOE) increased from 3205 to 4861 N/mm2. Physical and mechanical properties of the wood improved by treating with CCB preservative.Bangladesh J. Sci. Ind. Res. 50(3), 189-192, 2015

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Al-tememe, Zeinab A. M., Adnan A. Lahuf, Ali A. Kareem, Ali A. Kadhim, and Muntather M. AL-Mosawy. "A survey and molecular identification of Aspergillus versicolor causing brown rot on imported spruce (Picea canadensis) wood in Karbala province, Iraq and control it using Copper Boron Chromate." IOP Conference Series: Earth and Environmental Science 388 (December 5, 2019): 012010. http://dx.doi.org/10.1088/1755-1315/388/1/012010.

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Waldron, Levi, Paul A. Cooper, and Tony Y. Ung. "Prediction of long-term leaching potential of preservative-treated wood by diffusion modeling." Holzforschung 59, no. 5 (2005): 581–88. http://dx.doi.org/10.1515/hf.2005.095.

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Abstract An approach to modeling leaching and leaching impacts of preservative components from treated wood is presented based on three simple laboratory determinations: the amount of preservative component available for leaching (Le), equilibrium dissociation of preservative into free water in wood (Di) and diffusion coefficients for component leaching in different wood directions (D). In this study, the following inorganic wood preservative systems were investigated: chromated copper arsenate (CCA), the copper component of copper azole (CA) and alkaline copper quaternary (ACQ), and boron in disodium octaborate tetrahydrate (DOT). Aggressive leaching of finely ground wood showed that amounts of preservative compounds available for leaching were highest for borates, followed by copper in copper amine systems and arsenic in CCA, copper in CCA and chromium in CCA. The equilibrium dissociation or solubility of components in free water in the wood was much higher for borates and copper amine, followed by copper and arsenic in CCA and chromium in CCA. Use of the applicable diffusion coefficient (D) and Di or Le values in a diffusion model allows the prediction of total amount leached and emission or flux rate at different times of exposure for products with different dimensions and geometries. The approach was tested and generally validated through application of the model to results of laboratory water spray leaching of full-size lumber samples. The approach explains the rapid leaching of boron compounds (large diffusion coefficient and high initial dissociated concentration) compared to other preservative components and predicts that ACQ will have higher initial leaching rates compared to CCA and CA, but the latter preservatives will continue to leach copper at a measurable rate for a much longer time. The practical implications and limitations of the approach are discussed.

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Lima, Pedro Augusto Fonseca, Cassiano Pacheco da Silva, Fernando Nunes Gouveia, et al. "Eucalyptus wood treatment and leaching behavior of CCB (Chromated Copper Borate): a field test in Brazilian Midwest." Research, Society and Development 10, no. 11 (2021): e421101119746. http://dx.doi.org/10.33448/rsd-v10i11.19746.

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The use of Chromated Copper Borate (CCB) for wood treatment is known with several studies on a laboratory scale. However, there is a lack of field studies to analyze the effect of the CCB over time. This study aimed to evaluate the wood properties of Eucalyptus urophylla S.T. Blake x Eucalyptus grandis W. Mill ex Maiden (called E. urograndis), treated with CCB as well evaluate the leaching of chromium, copper and bore (Cr/Cu/B) in field test. The field experiment, with wood treated and untreated (no CCB application), was installed in 2016 and remained until 2018. Wood physico-mechanical properties were evaluated for each condition (treated and untreated) and at three different time: at 0, 1 and 2 years of field exposure. The elements (Cr/Cu/B) losses (leaching) were determined by the difference in the quantification of each element retained in the wood (retention), from year 0 (amount of original elements) in relation to years 1 and 2 of field exposure. The preservative treatment of E. urograndis wood with CCB was efficient to maintain its physical and mechanical properties (mass loss, basic density, rupture and elasticity modulus) during the 2 years of field exposure. The E. urograndis wood without CCB treatment showed reductions in the physical-mechanical properties, indicating their low natural durability. High leaching (close to 100%) for boron was observed. In addition, the total of CCB retention has not changed (statistically) after 2 years.

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Hatefi, Raheleh, Morteza Razmara Farzaghi, and Seyed Mohammad Zamanzadeh. "Evaluation of Ophiolite Complex Impact and Pollution Indices of Groundwater Resources in Jovein Area (NE Iran)." Journal of Advances in Environmental Health Research 13, no. 2 (2025): 121–28. https://doi.org/10.34172/jaehr.1389.

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Background: Potential ore deposits and mining activities can cause soil and groundwater pollution with heavy metals, posing risks to human health. This study aimed to identify heavy metal sources, their transfer patterns, and contamination levels in the Jovein aquifer (NW Sabzevar, Iran). Methods: The groundwater samples were analyzed using inductively coupled plasma mass spectroscopy (ICP-MS). Pollution indices, including the heavy metal pollution index (HPI) and heavy metal evaluation index (HEI), were calculated. Statistical analyses such as principal component analysis (PCA) and cluster analysis (CA) were applied, and results were mapped using ArcGIS software. Results: The average element concentrations followed the order: Boron (B)>chromium (Cr)>barium (Ba)>vanadium (V)>arsenic (As)>aluminum (Al)>lithium (Li)>selenium (Se)>molybdenum (Mo)>copper (Cu)>zinc (Zn)>uranium (U)>tungsten (W)>antimony (Sb). PCA showed Cr and nickel (Ni) originated from weathering of chromite ores and ultramafic rocks, while As and Cu were linked to sulfide mineralization. Although HPI levels were elevated, they remained below critical thresholds. CA grouped samples into two clusters: one with Ni, Cr, and Cu, and the other with As and Sb. Conclusion: Geogenic processes are the main contributors to groundwater contamination, while mining activities have minimal influence in the Jovein aquifer. Overall, the assessment reveals poor groundwater quality due to heavy metal pollution.

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Тези доповідей конференцій з теми "Chromate Copper Boron"

Arslan, Fatma, and Gülay Bulut. "Evaluation of mineral processing and metallurgical plants wastes." In Proceedings of XVI International Mineral Processing and Recycling Conference, Belgrade, 28-30.05.2025. University of Belgrade, Technical Faculty, Bor, 2024. https://doi.org/10.5937/imprc25196a.

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Анотація:

The mining process generates substantial waste containing various amounts of valuable metals. The conventional method for the disposal of waste is usually dumping. Mineral processing, pyrometallurgical, hydrometallurgical, and pyro-hydrometallurgical processes are applied to recover these metallic values. This study provides examples of studies conducted on evaluating wastes from some mineral processing and metallurgical plants in Turkey. Evaluation studies on mineral processing tailings such as iron, boron, and chromite, together with copper smelting and refining slags, are summarized. Related flow sheets developed as a result of experimental studies are also presented.

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