Article
Chemistry, Multidisciplinary
E. G. Saad, T. M. Zewail, A. A. Zatout, E. -S. Z. El-Ashtoukhy, M. H. Abdel-Aziz
Summary: In this study, a two-compartment galvanic cell was tested using two types of cation exchange membranes to treat sulfide waste and recover elemental sulfur. The optimal conditions for highest performance were determined through investigating various parameters, leading to high selectivity in sulfide removal and sulfur recovery with minimal interference with other contaminants.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Amit N. Shocron, Eric N. Guyes, Huub H. M. Rijnaarts, P. M. Biesheuvel, Matthew E. Suss, Jouke E. Dykstra
Summary: Harmful or valuable ionic species in seawater, brackish water, and wastewater are often amphoteric, weak acids or bases, making their removal challenging for conventional membrane technologies. Capacitive deionization (CDI) is an emerging membraneless technique that shows potential for removing pH-dependent species without chemical dosing, but its development is hindered by the complexities of pH dynamics and ion properties in a charging CDI cell. This study presents a theoretical framework for predicting the electrosorption of pH-dependent species in CDI cells and highlights counterintuitive design rules for efficient removal of amphoteric species like boron.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Multidisciplinary
Elzbieta Sobiecka
Summary: Chlorine is a common macronutrient found in nature. Human activities can disrupt its natural cycle and have negative effects on the environment. In order to restore natural balance, various biological processes for water and soil remediation have been studied. This research focuses on two chlorine conversion processes: anaerobic dechlorination of polychlorinated biphenyls (PCBs) and chloride elimination from aquatic environments.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Environmental
Kangning Gao, Jie Lu, Xi Wang, Dengxin Li, Shihong Xu
Summary: The presence of Fe3+ and hexavalent chromium have different effects on the removal of chlorine ions, while ferrous and manganese do not have a notable impact on chlorine removal.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Mukhethwa Netshia, Mandlenkosi G. R. Mahlobo, Mary A. Awotunde, Peter A. Olubambi
Summary: Various electrochemical techniques were used to study the corrosion behavior of CNT-reinforced NiAl alloys in NaCl and Na2SO4 environments. The addition of CNT increased the corrosion rate of NiAl in both NaCl and Na2SO4 environments. The corrosion products consisted of Al2O3 in NaCl environment and a porous passive layer was observed on the surface of the alloy specimens in Na2SO4 solution.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Environmental
Mengke Zhu, Zhiyou Tan, Xinghu Ji, Zhike He
Summary: This study investigated the removal of SO42 and Cl from RO concentrate and the improvement of water quality using a two-stage UHLA process and carbonation post-process. The results showed that the two-stage UHLA process achieved high removal efficiency for SO42 and Cl, and the carbonation post-process further improved the quality of the treated water. The study demonstrated the feasibility and effectiveness of the two-stage UHLA process for treating saline wastewater with high concentrations of SO42 and Cl.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Editorial Material
Chemistry, Multidisciplinary
Pania Newell
Summary: The collapse of Champlain Towers South in South Florida was a shock to the world. Factors such as oxidation, chloride, and sulfate attack can pose a threat to the safety of structures.
NATURE REVIEWS CHEMISTRY
(2021)
Article
Construction & Building Technology
Arya Anuj Jee, Bulu Pradhan
Summary: This study explores the impact of sulfate ions on the corrosion behavior of reinforced concrete induced by chloride, showing that sulfate ions can slow down chloride ingress and enhance corrosion activity, particularly when allied with sodium cation. The findings also indicate that Portland pozzolana cement concrete performs well against surrounding rebar corrosion.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Arya Anuj Jee, Bulu Pradhan
Summary: This study evaluated the influence of chloride and sulfate ions on the corrosion of reinforced concrete. The presence of sulfate ions delayed the ingress of chloride ions and resulted in lower chloride content on the rebar surface. Sulfate ions allied with sodium cation had the greatest impact on corrosion activity. Concrete with fly ash exhibited excellent resistance to corrosion, with Portland pozzolana cement performing better than ordinary Portland cement. Ammonium nitrate had a significant effect on chloride content and corrosion current density on the rebar surface.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Environmental
Do-Hwan Nam, Dongho Lee, Kyoung-Shin Choi
Summary: This study introduces new electrochemical and photoelectrochemical strategies for selectively removing Cl- from water and recovering it as Cl-2, HOCl, and ClO-. These methods rely on Bi as a Cl-storage/release electrode for the construction of Cl-removal and Cl-recovery cells, demonstrating the potential for generating electricity, fuels, and chemicals.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Biochemistry & Molecular Biology
Sabbir Ahmed, Joost C. de Vries, Jingyi Lu, Milan H. Verrijn Stuart, Silvia M. Mihaila, Robin W. M. Vernooij, Rosalinde Masereeuw, Karin G. F. Gerritsen
Summary: Protein-bound uremic toxins (PBUTs) are associated with the progression of chronic kidney disease (CKD) and its associated morbidity and mortality. Conventional dialysis techniques are not efficient in removing PBUTs due to their plasma protein binding. Therefore, novel approaches are being developed and validated in animal models before clinical trials.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Food Science & Technology
Vaibhav Maheshwari, Xia Tao, Stephan Thijssen, Peter Kotanko
Summary: The traditional dialysis method is insufficient for removing protein-bound uremic toxins (PBUTs). A novel approach of using binding competitors to enhance dialysis efficiency by increasing the free PBUT fraction has shown promising results in in silico, ex vivo, and in vivo studies. Further research is needed to identify ideal binding competitors for routine clinical use.
Article
Construction & Building Technology
Xuandong Chen, Feng Fu, Hai Wang, Qiuqun Liang, Aiping Yu, Kai Qian, Ping Chen
Summary: Electrochemical chloride extraction (ECE) is an effective method to remove chloride and extend the service life of reinforced concrete (RC) structures. A multi-phase mesoscopic numerical model is proposed to understand the mechanisms of long-term chloride ingress and subsequent ECE treatment. Factors such as ECE treatment time, current density, and concrete protective cover significantly influence the treatment efficiency.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Hongqiang Chu, Tao Wang, Lin Han, Li Cao, Ming-Zhi Guo, Yunchao Liang, Linhua Jiang
Summary: This study investigated the changes in local mechanical properties of cement paste under sulfate erosion by measuring micro-Vickers hardness. Factors such as water-to-cement ratio, sulfate concentration, chloride concentration, and current intensity were explored in relation to Vickers hardness. A prediction model was established to successfully predict Vickers hardness changes under varying conditions with high confidence.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Zhongtao Luo, Tianyi Zhi, Xiaohai Liu, Kunpeng Yin, Han Pan, Hongbo Tan, Hu Feng
Summary: In this study, Ba/EP composites were prepared by loading barium ions onto expanded perlite (EP) and added to Portland cement paste to investigate their effects on chloride binding capacity and setting time. The results showed that the addition of Ba/EP composites reduced the negative effect on setting time and improved chloride binding capacity, thus enhancing the performance of Portland cement paste.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yuehui Sun, Jiang-shan Li, Xin Chen, Xiao Huang, Mingzhi Guo, Yong Wan, Longzhao Lu, Zhen Chen, Zihan Ma
Summary: This study improved the pozzolanic activity of red mud and municipal solid waste incineration bottom ash through thermal modification, developing a binder with low CRM content that holds great potential for applications in the construction industry. The overall findings provide new insights into low carbon and green recycling of RM and MSWIBA with wide application potential.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Yujia Xiao, Ming-Zhi Guo, Ba Tung Pham, Tung-Chai Ling
Summary: This study investigates the feasibility of using luminescent material on recycled glass aggregate for decorative architectural mortar. The study finds that the luminescent-glass aggregate (LGA) can enhance the properties of architectural luminescent-glass mortars (ALM), such as compressive strength and resistance to alkali-silica reaction. The luminescent surface emits yellowish-green light and remains bright for 8 hours in a dark environment.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Xiaoli Wang, Ming-Zhi Guo, Gongbing Yue, Qiuyi Li, Tung-Chai Ling
Summary: This study investigated the synthesis of high belite sulfoaluminate cement using petroleum coke desulfurization residue, fly ash, carbide slag, and bauxite at low sintering temperatures. The thermal behavior, mechanical properties, heat of hydration, and hydration products of the cement were studied. The results showed successful production of the desired phases at low sintering temperatures, and the industrial solid wastes can be utilized up to 80%. The developed cement exhibited satisfactory clinker strength and had lower cumulative heat release compared to traditional sulfoaluminate cement.
CEMENT AND CONCRETE RESEARCH
(2022)
Review
Construction & Building Technology
Qifeng Song, Ming-Zhi Guo, Tung-Chai Ling
Summary: This paper investigates the development and mechanism of alternative binders in high temperature performance. It is found that different types and contents of supplementary cementitious materials have significant effects on high temperature properties, and the alteration of minerals and microstructure changes are summarized.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Wenhao Xu, Zijian Song, Ming-Zhi Guo, Linhua Jiang, Hongqiang Chu
Summary: In this study, magnesium oxychloride cement (MOC) was used as a sustainable carrier for effective recycling of dredged sediment (DS). The research found that DS can enhance the water resistance of MOC pastes, despite the negative influence of dilution on their mechanical properties. Strength retention tests showed that the compressive strength retention rate of MOC pastes blended with 10%-40% DS positively correlated with the DS content, and the modification induced by DS was superior to that by calcined dredged sediment (CDS). Multiple microscopic approaches were adopted to elucidate the modification of MOC by DS, and it was found that the addition of DS increased the porosity of the modified MOC pastes, thereby providing more channels for water intrusion and improving the water resistance of the MOC pastes.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Guohui Yang, Linhua Jiang, Fangfang Zhi, Weizhun Jin, Geyang Li
Summary: This study aims to evaluate the influence of cation types on the rust resistance performance of new nucleic acid corrosion inhibitors in simulated concrete pore solution. The results show that cation types affect the thickness and compactness of the passivated film on the steel surface, and also impact the critical chloride concentration of the nucleic acid inhibitor.
MAGAZINE OF CONCRETE RESEARCH
(2023)
Article
Chemistry, Physical
Saddick Donkor, Zijian Song, Linhua Jiang, Honqiang Chu
Summary: The adsorption mechanisms of inhibitor molecules at the metal-electrolyte interface play a significant role in metallic corrosion control in aqueous conditions. Computational techniques are increasingly used in metal corrosion inhibition research due to their advantages in time, cost, and environmental constraints, as well as the limitations of experimental techniques. This paper discusses the fundamental principles of MD simulation, adsorption mechanism, quantum calculations, and major publications in anticorrosive studies, highlighting the necessity of computational and theoretical approaches to substantiate experimental results.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Construction & Building Technology
Lei Chen, LinHua Jiang, Weizhun Jin, Ming-Zhi Guo, Yalu Niu, Hongqiang Chu, Zijian Song
Summary: This paper investigated the effects of citric acid and its salts on the properties of light-burned magnesia cement-based materials. The results showed that citric acid inhibited the expansion of the materials, while magnesium citrate and lithium citrate promoted expansion. The study also observed aggregation, dissolution, and precipitation of crystals during hydration.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Zijian Song, Na Xu, Lin Yu, Ming-Zhi Guo
Summary: The study found that ultrasonic trigger mode is more effective in repairing cement mortar, there is a threshold for ultrasonic power density to affect the repair efficiency, and increasing the ultrasonic frequency appropriately can enhance the repair efficiency.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Hongjie Xue, Haoyu Zhu, Mingzhi Guo, Shuwen Shao, Shiyi Zhang, Yan Zhang
Summary: In this study, four series of samples with different recycled aggregate (RA) replacement ratios were prepared to investigate the triaxial mechanical behavior of recycled aggregate concrete (RAC). Experimental results showed that the failure stress difference decreased with increasing confining pressure for the concrete samples. Based on the test results, a modified elastoplastic model was developed to accurately predict the mechanical behavior of RAC.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Qifeng Song, Ming-Zhi Guo, Yue Gu, Tung-Chai Ling
Summary: This study examines the impact of CO2 curing on the high-temperature performance of cement paste blended with different supplementary cementitious materials (SCMs). The results indicate that the carbonated samples cured for 2 days and then standard-cured for 26 days (CS curing) exhibited the best high-temperature resistance, as evidenced by higher compressive strength, lower water absorption, and decreased water sorptivity. Moreover, the use of CS curing with SCM blended cement blocks has the potential to reduce carbon footprint and improve performance under elevated temperatures, making it an environmentally friendly option.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Zijian Song, Yingjie Zhang, Lang Liu
Summary: This study used diatomite-based materials to prepare a rapid test bar for chloride ions in fresh concrete. The preparation was optimized considering liquid uptake efficiency and coloring consistency. Microscopic properties were examined to understand the mechanisms and a relationship between indicator numbers and chloride contents was established. The environmental stability of the test bars was examined to ensure their reliability. The test bars, composed mainly of diatomite and portlandite with a mesoporous structure, showed applicability and stability in detecting chloride content in fresh concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Jie Luo, Yi Xu, Hongqiang Chu, Lu Yang, Zijian Song, Weizhun Jin, Xiaowen Wang, Yuan Xue
Summary: The utilization of a novel monolithic superhydrophobic cement material effectively prevents water infiltration and enhances the longevity of the material. A method for improving superhydrophobic concrete was investigated with the aim of increasing its strength and reducing its cost by compounding superhydrophobic substances with water repellents. The findings demonstrate that the contact angle of the specimen increases with an increase in the dosage of isobutyltriethoxysilane (IBTES), but its compressive strength decreases significantly. The water absorption of the cementitious materials is influenced by the combined effect of porosity and superhydrophobicity.
Article
Construction & Building Technology
Yi Xu, Songru Tong, Xu Xu, Juntao Mao, Xuan Kang, Jie Luo, Linhua Jiang, Ming-Zhi Guo
Summary: This study aimed to investigate the impact of mixing expanded polystyrene (EPS) particles on foamed concrete. By comparing the modified EPS foamed concrete with ordinary foamed concrete, the influence of EPS particle dosage and size on the mechanical properties and thermal conductivity was analyzed. The pore structures of the two types of foamed concrete were characterized and compared using SEM, MIP, and IPP. The results showed that replacing 60% foam with large and small EPS particles led to lower water absorption and increased compressive strength. The thermal conductivity of the EPS modified foamed concrete was similar to/even slightly lower than that of the ordinary foamed concrete. The addition of EPS in foamed concrete increased the proportion of small connected pores and reduced the proportion of medium and large pores, effectively improving the stability.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)