Maya Ismayati^1,*, Nissa Nurfajrin Solihat¹, Fifi Melinda Setiawati², Wasrin Syafii², Yuki Tobimatsu³, Deni Zulfiana⁴

Journal of Renewable Materials, Vol.12, No.9, pp. 1625-1637, 2024, DOI:10.32604/jrm.2024.054739 - 25 September 2024

Abstract Tannins are capable of producing natural dyes with antioxidant and antibacterial propertis, while synthetic dyes are commonly used in the textile industry, causing environmental issues like water pollution. This research aims to utilize waste tannins as natural dyes as an alternative to synthetic dyes. This study examined the effect of the extraction method on tannin properties such as phenolic content, antioxidants, and antibacterial activity. In addition, Pyrolysis Gas Chromatography‒Mass Spectrometry (Py-GCMS) analysis was used to identify the effect of extraction temperature on the chemical elucidation of tannin. The effect of tannin concentration was evaluated against… More > Graphic Abstract

I. Putu Mahendra^*, Kartika Dinita

Journal of Renewable Materials, Vol.12, No.8, pp. 1369-1382, 2024, DOI:10.32604/jrm.2024.053001 - 06 September 2024

Abstract TEMPO/NaOCl/NaBr treatment significantly increased the number of negative charges on the cellulose surface. Two concentrations of NaOCl, 5 and 30 mmol/g of cellulose, were used in this study. The number of carboxyl groups in the two cellulosic samples oxidized using TEMPO/NaOCl/NaBr was 0.5160 and 1.8461 mmol/g of cellulose, respectively. The oxidized cellulose samples treated with 5 and 30 mmol/g NaOCl exhibited higher crystallinity, at 81.15% and 80.14%, respectively, compared to untreated cellulose, which had a crystallinity of 75.95%. The pH effect indicated that the highest adsorption capacity for methylene blue was achieved under alkaline conditions… More > Graphic Abstract

Nabila Eka Yuningsih, Latifa Ariani, Suprapto Suprapto, Ita Ulfin, Harmami Harmami, Hendro Juwono, Yatim Lailun Ni’mah^*

Journal of Renewable Materials, Vol.12, No.5, pp. 981-992, 2024, DOI:10.32604/jrm.2024.049109 - 17 July 2024

Abstract In this research, activated carbon from mangosteen peel has been synthesized using sulfuric acid as an activator. The adsorption performance of the activated carbon was optimized using malachite green dye as absorbate. Malachite green dye waste is a toxic and non-biodegradable material that damages the environment. Optimization of adsorption processes was carried out using Response Surface Methodology (RSM) with a Box-Behnken Design (BBD). The synthesized activated carbon was characterized using FTIR and SEM instruments. The FTIR spectra confirmed the presence of a sulfonate group (-SOH) in the activated carbon, indicating that the activation process using… More >

Annisa Ardiyanti, Suprapto Suprapto, Yatim Lailun Ni’mah^*

Journal of Renewable Materials, Vol.11, No.11, pp. 3789-3806, 2023, DOI:10.32604/jrm.2023.031354 - 31 October 2023

Abstract Dyes are pervasive contaminants in wastewater, posing significant health risks to both humans and animals. Among the various methods employed for effective dye removal, adsorption has emerged as a highly promising approach due to its notable advantages, including high efficiency, cost-effectiveness, low energy consumption, and operational simplicity compared to alternative treatments. This comprehensive review focuses on investigating adsorbents derived from biowastes and biomass, specifically carbon-based and non-conventional adsorbents, for the removal of malachite green, a widely used dye known for its toxic and carcinogenic properties. Carbon-based adsorbents encompass two main types: activated carbon and biochar, More > Graphic Abstract

Arpita Roy^1,*, H. C. Ananda Murthy² , Hiwa M. Ahmed^3,4, Mohammad Nazmul Islam⁵, Ram Prasad^6,*

Journal of Renewable Materials, Vol.10, No.7, pp. 1911-1930, 2022, DOI:10.32604/jrm.2022.019410 - 08 March 2022

Abstract Now-a-days nanotechnology is one of the booming fields for the researchers. With the increase in industrialization mainly textile, paper, medicine, plastic industry, there is an increase in concentration of organic dyes as pollutant. Release of harmful dyes in water bodies has become a serious issue, as most of the dyes are carcinogenic and mutagenic in nature and causes various diseases. Therefore, there is a requirement to find out new approaches for efficient treatment of effluent containing dyes. Nanoparticles are one of the potential solutions to this problem. They can be synthesized from different methods, however More >

Ibtissem Moussa¹, Noureddine Baaka¹, Ramzi Khiari^1,2,3*, Ali Moussa⁴, Gérard Mortha³, Mohamed Farouk Mhenni¹

Journal of Renewable Materials, Vol.6, No.1, pp. 55-67, 2018, DOI:10.7569/JRM.2017.634141

Abstract Natural dyes have become an interesting subject of study because of their better ecological properties in comparison to their synthetic counterparts. This article concerns the dyeing of wool, silk, and polyamide fabrics with natural dyes extracted from almond shells and stems. The developed method of dyeing by these extracts is interesting and very attractive for several reasons: firstly, the extracts used are the black liquor discharged from the industries of delignification, which is a chemical process for removing lignin from agricultural wastes to produce a cellulosic fiber; (ii) these natural dyes are renewable and available More >

Mario Alejandro Mejía Escobar^*, Franklin Jaramillo^*

Journal of Renewable Materials, Vol.3, No.4, pp. 302-317, 2015, DOI:10.7569/JRM.2014.634121

Abstract Energy alternatives have been one of the most important research focal areas of the last decade due to the imminent lack of fossil fuels. This motivation has allowed the evolution of the materials science field in areas such as electrochemistry, where high availability, low cost and negligible environmental impact are the desired principal qualities. For this reason, as an example of a photoelectrochemical device, we have proposed the use of natural dyes from 37 agro-industrial wastes in dye-sensitized solar cells. We obtained dyes from red cabbage, radish and roselle wastes with a good stability for More >

Mario Alejandro Mejía Escobar^*, Frankin Jaramillo^*

Journal of Renewable Materials, Vol.3, No.4, pp. 281-291, 2015, DOI:10.7569/JRM.2014.634142

Abstract In recent years, the development of new materials has contributed markedly to improving the efficiency of dye-sensitized solar cells (DSSCs). Mesoporous semiconductors, solid electrolyte, non-conventional catalysts and synthetic dyes without ruthenium have been the focus of study. With respect to the last, lanthanides and porphyrins have presented good properties, but these elements have the same disadvantage as rutheniumbased dyes; being complicated to synthesize and very expensive. These limitations have stimulated much research in the use of natural dyes as sensitizers due to their exceptional photoelectochemical properties and low cost. Furthermore, they are regarded as renewable More >