Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
Activated carbon sourced biomass materials widely applied as the energy storage supercapacitors possess high porosity, large specific surface area, controllable surface morphology as well as low-cost. In addition, chemical activation agents are very significant in the process, which are adopted in the opening of active sites and pore structures of activated carbon. This study is aimed at combining a single-step activating process with the carbonization and activation, using KOH, NaOH, and ZnCl2 as agents in the preparation of carbon from low-cost reeds wastes. Furthermore, the resulting thermal stability, density of the electrodes, surface of morphology, microstructure, specific surface area and pore size distribution were investigated. The results show variation in surface area, where the largest was observed in KOH-activated carbon electrode at 1183.540 m² g-1, alongside high fibers density and low crystallinity properties. This was followed by the treatment with ZnCl2 and NaOH, showing 768.301 m² g-1 and 284.823 m² g-1, respectively. Subsequently, the symmetric supercapacitor cells produced with KOH-activated carbon electrode exhibited a high specific capacitance of 141 F g-1, and maximum energy density of 4.89 Wh kg-1, at the power density of 35.32 W kg-1
Reclamation land is the final step of the nickel mining activity that needs the land management and selection of a suitable plant. Reclamation land has soil characteristics to meet the sufficient conditions in adaption and selection of the plant. So that, it is important to establish the pattern of soil properties and plant growth to guarantee the sustainability function of post-mining land reclamation. This research was the field experiment by conducting determination and observation of the plant growth in reclaimed plant blocks. Plants were observed for sengon (Albizia chinensis), acacia (Acacia mangium), monkeypod tree (Albizia saman), and nedun tree (Pericopsis mooniana). Samples data were collected from 10 trees on each block and observed of height and circular of the trunk. Soil composite samples were collected for soil volume weight (SWG) analysis, soil texture, permeability, pH, C-Organic, and P content. The result showed that (1) the soil characteristic changed the pattern of plant growth in the reclamation area by indicating different variation between plants, (2) the soil characteristic was more affected by chemical than physical properties as shown by plant growth, and (3) sengon and monkeypod trees followed the pattern of changed soil characteristic, while acacia and nedun tree did not change. However, of the four plants mentioned, sengon had the best plant performances in the soil physical and chemical properties at the study site, it could grow and adapt well to nickel ex-mining land even with limited organic matter content. With the results that the contribution to future research on the existence of a selected plant with a low dose of organic matter, can be used as the basis for the management of land reclamation of nickel ex-mining.
