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  • Open Access


    Chicken Eggshell as an Innovative Bioflocculant in Harvesting Biofloc for Aquaculture Wastewater Treatment

    Hajjar Hartini Wan Jusoh1, Nor Azman Kasan2,*, Hidayah Manan2, Nurfarahana Mohd Nasir1,3, Fareza Hanis Mohd Yunos1, Sofiah Hamzah1, Ahmad Jusoh1,2,*

    Journal of Renewable Materials, Vol.11, No.5, pp. 2321-2332, 2023, DOI:10.32604/jrm.2023.026086

    Abstract Implementation of biofloc technology (BFT) system in aquaculture industry shows high productivity, low feed conversion ratio, and an optimum culture environment. This study was divided into two phases. The first phase involved maintaining the water quality using the optimum carbon-to-nitrogen ratio by manipulating pH in culture water. The second phase examined the performance of harvesting biofloc (remaining phytoplankton and suspended solids in the system) using chicken eggshell powder (CESP). This study showed that pH 7 to 8 were the best biofloc performance with high removal percentage of ammonia (>99%) with a remaining ammonia concentration of 0.016 mg L−1 and 0.018… More > Graphic Abstract

    Chicken Eggshell as an Innovative Bioflocculant in Harvesting Biofloc for Aquaculture Wastewater Treatment

  • Open Access


    Application of Fe-Based Amorphous Alloy in Industrial Wastewater Treatment: A Review

    Liefei Pei, Xiangyun Zhang, Zizhou Yuan*

    Journal of Renewable Materials, Vol.10, No.4, pp. 969-991, 2022, DOI:10.32604/jrm.2022.017617

    Abstract Amorphous alloy (MGs) is a solid alloy with disordered atomic accumulation obtained by ultra-rapid solidification of alloy melt. The atom deviates from the equilibrium position and is in metastable state. Up to now, a large number of MGs have been applied to the treatment of dye and heavy metal contaminated wastewater and ideal experimental results have been obtained. However, there is no literature to systematically summarize the chemical reaction and degradation mechanism in the process of degradation. On the basis of reviewing the classification, application, and synthesis of MGs, this paper introduces in detail the chemical reactions such as decolorization,… More >

  • Open Access


    Adsorption Properties and Cost of Dicarboxylic Nanocellulose on Copper Ions for Wastewater Treatment

    Xiaozheng Sun1,*, Yu Yang1, Qiang He2, Jianye Li1, Rui Li1, Haitao Chen1

    Journal of Renewable Materials, Vol.10, No.3, pp. 751-766, 2022, DOI:10.32604/jrm.2022.016933

    Abstract The accumulation of Cu2+ in water is a potential threat to human health and environment. Dicarboxylic nanocellulose (DNC) with rich carboxyl groups was prepared through the NaIO4–NaClO2 sequential oxidation method to efficiently remove copper ions, and the Cu2+ adsorption properties and cost were studied. The maximum adsorption capacity reached 184.2 mg/g at pH 6 and an adsorbent dose of 5 g/L. Theoretically, the maximum adsorption capacities of monocarboxylic nanocellulose (MNC), DNC, and tricarboxylic nanocellulose (TNC) with carboxyl groups as the main adsorption sites were calculated to be 228.7, 261.3, and 148.1 mg/g, respectively. The Cu2+ adsorption costs of MNC, DNC, and TNC were… More > Graphic Abstract

    Adsorption Properties and Cost of Dicarboxylic Nanocellulose on Copper Ions for Wastewater Treatment

  • Open Access


    Removal of Cu(II), Pb(II), Mg(II), and Fe(II) by Adsorption onto Alginate/Nanocellulose Beads as Bio-Sorbent

    Ragab E. Abou-Zeid1, Korany A. Ali2, Ramadan M. A. Gawad2, Kholod H. Kamal3, Samir Kamel1, Ramzi Khiari4,5,6,*

    Journal of Renewable Materials, Vol.9, No.4, pp. 601-613, 2021, DOI:10.32604/jrm.2021.014005


    Alginate blended with cellulose nanocrystals (CNC), cellulose nanofibers (CNF), and tri-carboxylate cellulose nanofibers (TPC-CNF) prepared and encapsulated in the form of microcapsules (bio-polymeric beads). The cellulosic nanomaterials that used in this study were investigated as nanomaterials for wastewater treatment applications. Batch experiments were performed to study the removal of copper, lead, magnesium, and iron from aqueous solutions by the prepared beads. The effects of the sorbent dosage and the modified polymers on the removing efficiency of the metal cations were examined. Atomic absorption was used to measure the metal ions concentrations. The modified bio-polymeric beads (Alg-CNF, Alg-CNC, and Alg-TPC-CNF) exhibited… More >

  • Open Access


    Biofilter efficiency of Eichhornia crassipes in wastewater treatment of fish farming in Amazonia

    Rubim MAL1, PR Isolino Sampaio1, P Parolin2,3

    Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 244-251, 2015, DOI:10.32604/phyton.2015.84.244

    Abstract Fish is a very important part of the human diet in Amazonia. Near the growing cities, fish populations and individual size have decreased over the past decades. Alternatives to traditional and industrial fishing arise, including fish farming. Strategies to minimize the impact of fish farms on the environment are needed to have a regular and healthy fish supply. This is to avoid a reduction of biodiversity, a depletion of natural resources, and/or the induction of significant changes in the structure and functioning of adjacent ecosystems. Very little research has been performed on management of effluents as to maintain the quality… More >

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