Bamboo charcoal blocking electromagnetic waves

Bamboo charcoal was successfully carbonized at 500 °C and 800 °C using Malaysia buluh madu (Gigantochloa albociliata). Structural analysis was done using Atomic Force Microscopy (AFM) in two different solvents; ethanol and DI water. The functional groups of bamboo charcoal were confirmed using Fourier Transform Infrared Spectroscopy (FTIR). The adsorption property of bamboo charcoal solution was investigated at different concentrations of 0.2, 0.4 and 0.7 mg/mL, using methylene blue test and characterized using UV-Vis Spectroscopy. Based on the adsorption investigation, it shows that the adsorption was increased as the concentration increased. It was also shown that at higher temperature and longer duration time, the adsorption process is improved.

BioResources

The carbonization of five Malaysian bamboo species, namely Bambusa vulgaris, Dendrocalamus asper, Gigantochloa hasskarliana, Gigantochloa levis, and Schizostachyum brachycladum, was conducted to investigate the charcoal properties and compare the quality of bamboo charcoal produced based on proximate analysis. Carbonization at 750 °C using a modified Iwasaki steel drum kiln was successful for all bamboo species. Bamboo morphological features varied and basic density increased with culm height. A charcoal yield of more than 30% was recorded in all bamboo species except for B. vulgaris and D. asper. Charcoals made from D. asper and G. hasskarliana could serve as the alternative raw material for charcoal production in charcoal industries due to their low moisture, low volatile matter, low ash, and high fixed carbon content. All species had a mean gross calorific value between 24.4 and 29.2 MJ/kg. Among different culm sections, the bottom section produced the best quality charcoal. The ...

Journal of Chemical Engineering and Industrial Biotechnology

Bamboo has a very rapid growth rate and has been considered a promising non-wood biomass material that has the potential as a feedstock for charcoal production. This study was carried out to elucidate the physico-chemical and energy characteristic of bamboo charcoal produced from two (2) different species which were Aur Kuning Bamboo and Beting Bamboo. Each bamboo was carbonized at a temperature of 300 to 400oC for a duration of two hours. It was found that the density and volatile matter content of bamboo charcoal have decreased, while the ash content, fixed carbon (FC) content and calorific value (CV) have increased after being converted into charcoal. The results show that Aur Kuning Bamboo has good quality bamboo charcoal in comparison with Beting Bamboo in terms of its FC and CV content. Based on the average value, the FC (82.10%) and CV of Aur Kuning Bamboo (27.23%) were higher than FC (70.42%) and CV (26.05%) of Beting Bamboo with 16.59% (FC) and 4.53% (CV) different. Statist...

Energy Procedia, 2015

The purpose of this study was to assign the utilization of Asper Backer bamboo charcoal as activated carbon and pyroligneous acid as an alternative coagulating and antifungal agents for natural rubber sheet production. The effect of chemical activation process of bamboo charcoal was investigated. The physical properties like iodine number, moisture, ash, volatile and fixed carbon contents were measured. The results were found that the bamboo activated carbon has the highest iodine number value of 1398 mg/g which indicating a large of adsorption capacity at the optimum conditions as microwave power of 360 watts, activation time of 15 mins and the ratio of charcoal : phosphoric acid as 1 : 4. In addition, the effect of coagulating and anti-fungal activities of pyroligneous acid that is a by-product of Dendrocalamus Asper Backer bamboo charcoal burning was also observed. The comparison properties of pyroligneous acid with the commercial wood vinegar, formic and acetic acids have been measured. The coagulating efficiency of pyroligneous acid exhibited the shortest possible coagulation time at 18.30 mins between acids and latex. Herein, the antifungal efficiency was determined from a fungi growth area only 5% on air dried sheet rubber surfaces. The results were found that the coagulating and anti-fungal properties showed in the following order of commercial wood vinegar > bamboo pyroligneous acid > formic acid > acetic acid according to their acidic and phenolic compound contents.

BioResources

Bamboo biomass is known for its low cost, abundance, fast growth rate, low weight-to-height ratio, and load-bearing abilities, making it an attractive alternative to materials such as wood, metal, steel, and plastic for multiple applications. Bamboo is traditionally used in handicrafts, food, building, construction, pulp, and paper. The production of energy and green adsorbents with unique properties are a few emerging applications of bamboo. Porous structured, bamboo-based charcoal allows the separation of solute from solvent and can be used to detoxify the air, water, and soil. The surface functional groups can be enhanced during thermal processing, yielding activated carbon products and serving greenhouse gas capturing applications. Nanoparticle particles (Ni0.5Zn0.5Fe2O4 and silver) coated bamboo charcoal has shown microwave and Infrared energy shielding effects. Bamboo-based charcoal also has exceptional medicinal values, is an efficient drug-delivery agent, and has tremendous ...

AIP Conference Proceedings, 2010

This study evaluatedt he effect of microwave treatmento n densityo f Gigantochloa scortechinii (Semantan) bamboo strips. Gigantochloa scortechinii bamboo specimens were subjected to microwave radiation with varying power intensities and durations. Six combinations of power intensities and time were used in this study. After the microwave treatment,o ven-dry density of the bamboo specimens was determinedi n accordance with ASTM D 2395-93 and comparison was made with untreated specimens. The results in generals howed that densityi ncreased when exposing bamboo to microwave fields of varying intensities. Microwave combinations of 500 watts and 6 minutes exposure time was found having the greatest effect on bamboo internodes with density increase of about 23.3%. At medium power intensity (430 watts), increasing exposure time from 6 minutes to 10 minutes generally increased bamboo internodes density by 11.6%. However, at medium-high power intensity (500 watts), increasing exposure time did not contribute to largerpercentage of density increase.

Academia Letters, 2021

Bamboo (Bambusa) is divided into few subfamilies, with thousands of different species ranging from wood to bamboo and herb (Bakri et al. 2021). Bamboo products have been produced for thousands of years, thus it is rich in traditional features. As a result, the bamboo plant is considered to have beneficial characteristics such as propriety, serenity, and kindness. Also, each species of bamboo has unique traits and qualities (Emamverdian et al, 2020; Zakikhani et al. 2017). Bamboo is commonly utilized as a building material or a raw material for the manufacturing of paper sheets, erosion control and decoration. Bamboo is widely available across the world, with 64% of bamboo plantations coming from Southeast Asia, 33% from South America, and the remainder from Africa, and Oceania (Bonilla et al. 2010; Mohd et al. 2012). Bamboo is a natural product that has a wide range of uses and advantages. Increased logging operations for several reasons have led to the forest's inability of absorbing carbon dioxide emissions. This results in an enormous amount of CO2 being released into the sky, trapping heat inside the atmosphere (greenhouse effect), and causing global warming. Environmental concerns have recently posed a danger to the environment's life cycle throughout the world, owing to countries use of non-biodegradable materials in industrial sectors around the world (Abdel-Shafy and Mansour, 2018). It has become a major issue since it is linked to the product lifecycle phase and is caused by the extraction or deposition of waste elements that are not properly disposed of.

2014

Key parameters of colloids are often directly related to or can be derived from permittivity or conductivity. Dielectric dispersion analysis (dielectric spectroscopy) yields insights into colloidal properties. A dielectric meter using a new sensing technique has been developed. by Hideki Wakamatsu Dielectric spectroscopy is useful for the characterization of colloidal dispersions. In the past, dielectric spectroscopy has been attempted using parallel metal electrodes to measure the permittivity and conductivity of colloids. However, it is difficult in practice to make these measurements in conductive solutions because large measurement errors can be caused by electrode polarization, which is a kind of contact impedance between the electrode and the solution. Electrode polarization behaves like a capacitance and masks the true properties of the solution at low frequencies. The HP E5050A colloid dielectric probe was developed for colloidal liquid evaluation. Its electromagnetic induct...

Journal of the Textile Institute, 2012

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Materials Research Express, 2019

Electromagnetic waves emitted by electrical and electronic devices constitute interference with each other, which becomes a problem for security devices, space vehicles, ships, electronics or even human beings. Electromagnetic interference (EMI) protective materials are being developed to eliminate such negative effects of electromagnetic waves. Especially carbon-based ones are becoming increasingly important. The carbonized material biochar, derived from biomass, emerges as a sustainable, renewable, environmentally friendly and inexpensive EMI material. In this study EMI protective effect of biochar derived from industrial tea waste biomass and its iron composite was investigated. The effect values of the samples were found to be greater than 10 dB.