Article
Engineering, Environmental
Rennan Felix da Silva Barbosa, Noelle Cardoso Zanini, Daniella Regina Mulinari, Derval dos Santos Rosa
Summary: This study obtains macro and nanoscale cellulose samples from eucalyptus by-products through ball milling and modification processes, and characterizes their structural features and adsorption performance. The results show that the nanoscale structure has a higher modification degree and thermal stability, and exhibits better chromium adsorption capacity.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Energy & Fuels
Ying Chen, Jinjin Cui, Yuning Liang, Xuesong Chen, Yuan Li
Summary: In this study, a green and high-efficiency adsorbent was synthesized and characterized. The adsorption properties of the composite material towards Cu(2+) were investigated, showing a high adsorption capacity and rate under certain conditions. The adsorption process was found to be consistent with pseudo-second-order kinetic model and Langmuir model, and the overall process was spontaneous and endothermic.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Jingjing Wang, Jun Wei
Summary: Zr(IV)-crosslinked carboxymethyl cellulose/carboxymethyl chitosan hydrogels were prepared as adsorbents for phosphate removal. The adsorption capacity of the hydrogel for PO4 increased with the content of PEG, reaching equilibrium within 400 minutes. The adsorption mechanism involved electrostatic interaction and ion exchange.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Engineering, Environmental
Miaoyang Huang, Wenjing Yan, Linye Zhang, Zehua He, Jiahao Ma, Yifu Ding, Junjin Ou, Shenggui Chen, Wenli Jiang, Xiyi Dai, Zhongmin Li, Guangtao Wei
Summary: A novel cation-anion adsorbent based on DCMC and TA was produced and characterized. The effects of absorbent dosage, pH values, initial concentration, and temperature on the adsorption of Cr(VI) and Ni(II) were studied. The results showed that the absorbent has great potential in water treatment.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Chemical
Ahmed El Nemr, Ahmed Eleryan, Safaa Ragab
Summary: In this study, a cellulose-triethylenetetramine glutaraldehyde (CTG) compound was prepared from dissolved rice husk cellulose. The CTG was evaluated as a valuable material for the adsorption of toxic chromium from an aquatic environment, with a maximum adsorption capacity of 188.68 mg/g according to the Langmuir model. The adsorption process followed the kinetic model of pseudo-second-order, and the mechanism was identified as heterogeneous adsorption.
DESALINATION AND WATER TREATMENT
(2022)
Article
Polymer Science
Ali Olad, Maryam Bastanian, Soheil Aber, Hamid Zebhi
Summary: A simple, cheap, and environmentally friendly bio-conducting interpenetrated polymer blend network was prepared as an efficient system for the industrial removal of toxic Cr(VI) ions from aqueous solution. The CMC/PANI blend, ion-cross-linked by Al(3+)cations, showed good stability and high surface area, suitable for the removal of toxic Cr(VI) ions. Removal experiments were conducted, revealing that the removal of Cr(VI) ions strongly depends on solution pH, with the maximum monolayer adsorption capacity at pH 2 being 136.98 mg/g at 25 degrees C.
IRANIAN POLYMER JOURNAL
(2021)
Article
Materials Science, Paper & Wood
A. Abd-Elhamid, E. M. Abu Elgoud, H. F. Aly
Summary: This research presents a simple method to functionalize graphene oxide with sodium carboxymethyl cellulose using tetraethyl orthosilicate as a linker for the rapid and significant removal of Nd(III) and Ce(III) from aqueous solutions. The prepared composite (GO-CMC) demonstrates excellent adsorption performance, fitting well with pseudo-second-order kinetic model and Langmuir isotherm model.
Article
Engineering, Environmental
Karthik Rathinam, Raji Atchudan, Thomas Nesakumar Jebakumar Immanuel Edison
Summary: This study successfully developed a ZrO2-NaMMT@700 composite with excellent adsorption performance and easy regeneration, which can effectively remove phosphate and Cr(VI) anions from water. The composite demonstrated superior adsorption capacity in experiments and conformed to the Langmuir isotherm and pseudo-second-order kinetic models.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Inorganic & Nuclear
Sarat Kanrar, Abir Ghosh, Ayan Ghosh, Mriganka Sadhukhan, Tanmay Bhowmik, Uday Chand Ghosh, Palani Sasikumar
Summary: Chromium(III)/zirconium(IV) impregnated chitosan-beta-cyclodextrin bio-composite (CB@CZ) was fabricated successfully using a simple chemical method. The material shows selective adsorption of Cu(II) ions and has potential for removing Cu(II) from contaminated waste-water.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Rongrong Si, Yehong Chen, Daiqi Wang, Dongmei Yu, Qijun Ding, Ronggang Li, Chaojun Wu
Summary: Carboxymethyl cellulose nanofibrils (CMCNFs) with different carboxyl content were prepared and used to prepare CMCFs-PEI aerogels. The adsorption capacity of CMCFs-PEI aerogels for Cu2+ was found to be efficient, suggesting their potential application in wastewater treatment.
Article
Engineering, Environmental
Hebat-Allah S. Tohamy, Mohamed El-Sakhawy, Samir Kamel
Summary: A composite hydrogel was prepared by grafting carboxymethyl cellulose onto graphene oxide and blending it with polyethylene glycol for the removal of Ni ions from aqueous solution. The hydrogel exhibited promising properties fitting with the Langmuir isotherm model and pseudo-second order kinetics, indicating an endothermic adsorption process.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Engineering, Environmental
Meisam Sadeghi, Zahra Moghimifar, Hamedreza Javadian, Mohsen Jahanshahi, Majid Farsadrooh
Summary: In this study, spherical CMC-C-Ni composite beads were synthesized as an adsorbent for the treatment of oily wastewater from rapeseed industry. The beads exhibited a porous structure and stable physical characteristics. Results showed that increasing fluid viscosity led to a reduction in terminal settling velocity.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Hua-Rong Yang, Shan-Shan Li, Qing-Da An, Shang-Ru Zhai, Zuo-Yi Xiao, Li-Ping Zhang
Summary: Novel millimeter hollow microspheres were fabricated from carboxymethyl cellulose microspheres and polyethyleneimine using glutaraldehyde as a crosslinking agent. The usage and treatment time of polyethyleneimine can distinctly tailor the structure of the carboxymethyl cellulose microspheres, resulting in the formation of different hollow microspheres with varied shell thickness and size. The prepared hollow microspheres have excellent adsorption performance toward targeted methyl blue under testing conditions, indicating broad application prospects in the treatment of emerging contaminants in wastewater.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Applied
Vipawan Pitpisutkul, Jutarat Prachayawarakorn
Summary: Incorporating carboxymethyl starch and zinc oxide nanoparticles into hydroxypropyl methylcellulose film can improve its limitations for wound dressing application. The resulting films have increased moisture uptake, water vapor transmission rate, oxygen transmission rate, and antibacterial activity.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Physical
Xiong Peng, Shujun Liu, Zhijia Luo, Xiwen Yu, Wanwen Liang
Summary: In this study, a novel nitrogen and sulfur functionalized 3D macroporous cellulose material (MPS) was successfully prepared and showed high removal efficiency and selectivity towards Cr(VI) in wastewater treatment. The presence of MoS42- in MPS contributed significantly to the selectivity. The results provide a new idea for the design of adsorbents with superior selectivity for removing Cr(VI).
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.