NIKITA GUPTA, SARITA KALLA, Z.V.P. MURTHY^*

Journal of Polymer Materials, Vol.40, No.3-4, pp. 317-328, 2023, DOI:10.32381/JPM.2023.40.3-4.12

Abstract Tetramethylurea (TMU) is a good solvent for organic substances and has received little attention as compared to other solvents. The TMU is a polar solution and is one of the molecules with an amphiphilic character. In the present work, an attempt has been made to use TMU as an additive in the preparation of nanofiltration membranes to improve the hydrophilicity of the membrane. The polysulfone membrane has been modified by incorporating different concentrations of TMU (0, 0.5, and 1 wt.%) in order to check the rejection of atrazine in water. This study aim is to optimize the conditions to enhance… More >

Hajjar Hartini Wan Jusoh¹, Nor Azman Kasan^2,*, Hidayah Manan², Nurfarahana Mohd Nasir^1,3, Fareza Hanis Mohd Yunos¹, Sofiah Hamzah¹, Ahmad Jusoh^1,2,*

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

Hebat-Allah S. Tohamy, Mohamed El-Sakhawy, Samir Kamel^*

Journal of Renewable Materials, Vol.10, No.7, pp. 1889-1909, 2022, DOI: 10.32604/jrm.2022.019211

Abstract A novel magnetic hydrogel loaded with graphene oxide (GO) was developed in this study. Firstly, GO was prepared from bagasse through a single step via oxidation in the presence of ferrocene under muffled atmospheric conditions, followed by the loading of different amounts of magnetite onto GO via co-precipitation reaction of iron onto GO sheets. Finally, the 2-acrylamido-2-methyl-1-propane sulfonic acid was grafted onto carboxymethyl cellulose in the presence of magnetite GO and N, N′-methylenebisacrylamide as crosslinker yielded hydrogel. The structure, morphological, and thermal behavior of the prepared hydrogels were investigated. In addition, the adsorption performance of Ni(II) ions from aqueous media… More > Graphic Abstract

F. Kavin^1,*, R. Senthilkumar²

CMC-Computers, Materials & Continua, Vol.71, No.2, pp. 2789-2806, 2022, DOI:10.32604/cmc.2022.021577

Abstract The main aim of this work is to design a suitable Fractional Order Proportionl Integral Derivative (FOPID) controller with Chaotic Whale Optimization Algorithm (CWOA) for a RO desalination system. Continuous research on Reverse Osmosis (RO) desalination plants is a promising technique for satisfaction with sustainable and efficient RO plants. This work implements CWOA based FOPID for the simulation of reverse osmosis (RO) desalination process for both servo and regulatory problems. Mathematical modeling is a vital constituent of designing advanced and developed engineering processes, which helps to gain a deep study of processes to predict the performance, more efficiently. Numerous approaches… More >

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 >

Abderrezzaq Benalia^1,2, Kerroum Derbal^2,*, Amel Khalfaoui¹, Antonio Pizzi³, Ghouti Medjahdi⁴

Journal of Renewable Materials, Vol.10, No.3, pp. 625-637, 2022, DOI:10.32604/jrm.2022.017848

Abstract The purpose of this work is the study the ability of the plant material Aloe vera to act as natural coagulant using raw water obtained from a drinking water treatment plant (Mila, Algeria). Different solvents such as: NaCl; NaOH and HCl were used as chemical activators to extract the active components from the Aloe vera plant, and different coagulation-flocculation experiments were conducted in a jar test apparatus to evaluate the performance of the extracted coagulant. Also, the effect of coagulant dose on some water parameters such as turbidity, pH, total alkalinity and organic matter were investigated. The results showed that… More > Graphic Abstract

Xiaozheng Sun^1,*, 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

Ragab E. Abou-Zeid¹, Korany A. Ali², Ramadan M. A. Gawad², Kholod H. Kamal³, Samir Kamel¹, Ramzi Khiari^4,5,6,*

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

Abstract

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 >

Rubim MAL¹, PR Isolino Sampaio¹, P Parolin^2,3

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 >

MAHMOUD MOUSTAFA^1,2*, TAREK TAHA³, MOHAMED ELNOUBY⁴, NEHAL EL-DEEB⁵, GAMAL HAMAD⁶, M.A. ABUSAIED⁷, SULAIMAN ALRUMMAN¹

BIOCELL, Vol.41, No.2-3, pp. 67-73, 2017, DOI:10.32604/biocell.2017.41.067

Abstract Current investigation has shown that human exposure to aflatoxins is not limited to the administration of contaminated cereals, but water is another possible source. This study was aimed to design easily applicable method to eliminate aflatoxin B2 (AFB2) from contaminated drinking water. Electrospinning has been used for preparation of probiotic-coated polyvinyl alcohol (PVA) and cellulose acetate (CA) nanofibers. Both of these hybrid nanofibers were studied by scanning electron microscopy (SEM) and Fourier-transformed infrared spectroscopy (FT-IR). SEM showed the proper coating of probiotic strains (Kluyveromyces lactis CBS 2359 and Saccharomyces cerevisiae ATCC 9763) on both nanofiber types. Different areas (1-5 cm²)… More >