Zhijian Zhou¹, Jie Yan^1,*, Xinxiang Du¹, Qiulin Xu¹, Zijun Wu², Jinlan Yang³, Xitong Fang¹, Qiuling Zhong², Qiaoguang Li^1,*

Journal of Renewable Materials, Vol.11, No.9, pp. 3501-3515, 2023, DOI:10.32604/jrm.2023.027852 - 20 July 2023

Abstract Iron-pillared bentonite (FB) was prepared by Fe(III) modified bentonite, and then the composites (FB-OS) were prepared by iron-pillared bentonite and oyster shell powder. The composites were characterized by FTIR, SEM, TGA, and EDS, and the phosphorus removal test was carried out. The results showed that FB-OS contained a large amount of CaO. Its structure was compact, but there were gaps in it. The maximum bending stress and compressive strength were 43.7 N and 0.927 MPa, respectively. The phosphorus removal test showed that the phosphorus removal rate of FB-OS was more than 90%, and measured the More > Graphic Abstract

Yalin Li^1,*, Lei Liu¹, Wenbao Huang¹, Junpu Xie², Zhaoxia Song¹, Shuna Guo¹, Enci Wang¹

Journal of Renewable Materials, Vol.11, No.7, pp. 3001-3023, 2023, DOI:10.32604/jrm.2023.026604 - 05 June 2023

Abstract To achieve optimal recovery and value-added utilisation of cellulose in peanut shells, the cellulose in peanut shells was first extracted using the sodium hydroxide-sodium chlorite method. Then, cellulose hydrogel was prepared by graft copolymerisation using N, N’-methylenebisacrylamide as the cross-linking agent, sodium persulfate as the initiator, and acrylic acid as the monomer. Orthogonal optimisation experiments were designed to obtain optimal process parameters for hydrogel preparation with the cellulose dosage of 0.40 g, initiator dosage of 0.20 g, polymerisation temperature of 70°C, cross-linking agent of 0.25 g, and monomer dosage of 3.0 mL. The effect of initiator… More > Graphic Abstract

S. E. Burruel-Ibarra¹, R. A. Esquer-Osuna², R. G. Valdez-Melchor², D. A. Cuevas-Acuña², L. QuihuiCota³, J. Juárez⁴, J. C. Campos-García², E. Valbuena-Gregorio², M. A. López-Mata^2,*

Journal of Renewable Materials, Vol.11, No.6, pp. 2647-2663, 2023, DOI:10.32604/jrm.2023.027372 - 27 April 2023

Abstract This study aimed to characterize the physical-chemical and biological properties of pectin (PC)/chia seed mucilage (CM) membranes. PC/CM [100/0 (control), 80/20%, 60/40%, and 40/60% w/w] membranes were prepared using the casting method. The membranes (PC/CM) were thin, yellow, lightly opaque (≈10%) and capable of blocking light UVB (between 66 at 52%). SEM analysis showed the presence of aggregates in the shape of a sphere (≈13 µm) and ovoid (≈25 µm). The proportion of 80/20 showed an increase in tensile strength (29%) and elastic modulus (19%) when compared to the control. FTIR analysis exhibited intermolecular interactions More > Graphic Abstract

Yatim Lailun Ni’mah^*, Nabila Eka Yuningsih, Suprapto Suprapto

Journal of Renewable Materials, Vol.11, No.6, pp. 2913-2924, 2023, DOI:10.32604/jrm.2023.025431 - 27 April 2023

Abstract The adsorption of Pb(II) on silica gel synthesized from chemical glass bottle waste has been studied. The effect of independent variables (adsorbent dose, initial concentration of Pb(II), contact time, and pH) on the Pb(II) removal from water was evaluated and optimized using the Response Surface Methodology (RSM). Under optimized conditions (adsorbent dose: 20 mg; contact time: 30 min; initial Pb(II) concentration: 120 mg. L⁻¹ ; and pH: 8), the removal of Pb(II) was 99.77%. The adsorption equilibrium data obtained from the batch experiment were investigated using different isotherm models. The Langmuir isotherm model fits the experimental More >

Junzhen Di, Xueying Sun^*, Siyi Zhang, Yanrong Dong, Bofu Yuan

Journal of Renewable Materials, Vol.11, No.5, pp. 2209-2232, 2023, DOI:10.32604/jrm.2023.025241 - 13 February 2023

Abstract To address the serious pollution of heavy metals in AMD, the difficulty and the high cost of treatment, Fe₃O₄-L was prepared by the chemical co-precipitation method. Based on the single-factor and RSM, the effects of particle size, total Fe concentration, the molar ratio of Fe²⁺ to Fe³⁺ and water bath temperature on the removal of AMD by Fe₃O₄-L prepared by chemical co-precipitation method were analyzed. Static adsorption experiments were conducted on Cu²⁺, Zn²⁺ and Pb²⁺ using Fe₃O₄-L prepared under optimal conditions as adsorbents. The adsorption properties and mechanisms were analyzed by combining SEM-EDS, XRD and FTIR for characterization. The… More > Graphic Abstract

Xiang Zhang^1,*, Miao Su¹, Wenjie Yu², Zhen Lei¹, Jun Ren¹, Juntong Qu¹

CMES-Computer Modeling in Engineering & Sciences, Vol.136, No.2, pp. 1487-1507, 2023, DOI:10.32604/cmes.2023.025799 - 06 February 2023

Abstract The durability of cement-based materials is related to water transport and storage in their pore network under different humidity conditions. To understand the mechanism and characteristics of water adsorption and desorption processes from the microscopic scale, this study introduces different points of view for the pore space model generation and numerical simulation of water transport by considering the “ink-bottle” effect. On the basis of the pore structure parameters (i.e., pore size distribution and porosity) of cement paste and mortar with water-binder ratios of 0.3, 0.4 and 0.5 obtained via mercury intrusion porosimetry, randomly formed 3D… More >

Ahmad S. Awad^1.*, Banan Hudaib², Waid Omar²

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.6, pp. 1535-1549, 2023, DOI:10.32604/fdmp.2023.024300 - 30 January 2023

Abstract In this study, the potential of a low-cost bio-adsorbent, taken directly from Date Palm Trunk Fibers (DPTF) agricultural wastes, for cadmium ions removal from wastewaters is examined. The performances of this adsorbent are evaluated by building breakthrough curves at different bed heights and flow rates while keeping other parameters, such as the initial feed concentration, pH, and particle size, constant. The results indicate that the maximum cadmium adsorption capacity of DTPF can be obtained from the Thomas model as 51.5 mg/g with the most extended mass transfer zone of 83 min at the lowest flow More > Graphic Abstract

Chao Wang, Xuezhen Feng, Wanbing Li, Shibin Shang^*, Haibo Zhang^*

Journal of Renewable Materials, Vol.11, No.4, pp. 1793-1805, 2023, DOI:10.32604/jrm.2023.024521 - 01 December 2022

Abstract Due to the low content of adsorption-active groups in lignin, its application in the field of adsorption is limited. Herein, we first prepared cationic kraft lignin acrylate, from which a cationic lignin (CKLA) hydrogel was further prepared by cationic kraft lignin acrylate, acrylamide, and N, N’-methylenebisacrylamide. The morphology, compression properties and swelling properties of CKLA hydrogels were investigated. The prepared CKLA hydrogel was applied as an adsorbent for Congo red. The effect of CKLA hydrogel dosages, initial concentration of Congo red, and pH on adsorption efficiency was investigated. The maximum Congo red removal efficiency was More >

Lijing Huang, Penghui Li, Kangjie Jiang, Wenjuan Wu^*

Journal of Renewable Materials, Vol.11, No.4, pp. 1613-1626, 2023, DOI:10.32604/jrm.2022.023605 - 01 December 2022

Abstract The effect of lignin structural units on enzymatic hydrolysis of lignocellulosic biomass was investigated, especially the inhibitory role of lignin in non-productive adsorption with enzymes. Milled wood lignin (MWL) was isolated from different hardwoods of poplar, eucalyptus and acacia. The isolated lignin samples were characterized by elemental analysis, gel permeation chromatography, nitrobenzene oxidation and fourier infrared spectroscopy. The mechanism of lignin structural units on enzymatic hydrolysis of cellulose was studied by quartz crystal microbalance (QCM). The results showed that different structural units of lignin had different adsorption capacity for enzymes. The results of nitrobenzene oxidation… More > Graphic Abstract

Najeh Ghilen^1,3,*, Mohammed El Ganaoui³, Slimane Gabsi^1,2, Riad Benelmir³

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 1015-1026, 2023, DOI:10.32604/fdmp.2022.022285 - 02 November 2022

Abstract A dynamic model is presented for a chiller working with a composite adsorbent (silica activated carbon/CaCl₂)–water pair in a solar-biomass cooling installation. The main objective is determining a link between two possible evaporator configurations and the refrigerator’s performances. The two considered evaporators work at different pressure levels. The related time evolution profiles of temperature, pressure and water content are studied. Moreover, the effects of hot water inlet temperature and cooling water inlet temperature on the specific cooling capacity (SCP) and coefficient of performance (COP) are predicted by means of numerical simulations. The results show that an More >