Article
Green & Sustainable Science & Technology
Raja Zmemla, Mounir Benjdidia, Ikram Naifar, Chaouki Sadik, Boubaker Elleuch, Ali Sdiri
Summary: An integrated approach for sustainable use of phosphogypsum byproducts as road materials has been developed, focusing on evaluating the potential application of phosphogypsum-based material for road base layers. The study addressed physico-chemical properties, mechanical strengths, and environmental aspects, indicating that cement-stabilized material showed higher strength values and potential environmental remediation benefits.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2022)
Article
Environmental Sciences
Sarra Meskini, Issam Mechnou, Moncef Benmansour, Toufik Remmal, Azzeddine Samdi
Summary: The transformation of phosphate ore into phosphoric acid generates large amounts of phosphogypsum, which is a widely stockpiled industrial by-product. Despite being considered the least damaging solution to the environment, its presence of harmful impurities such as heavy metals and radionuclides poses a risk for the receiving environment. This study explores the environmental characterization of Moroccan phosphogypsum and evaluates the environmental performance of a new lime-fly ash treated phosphogypsum based road material.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Materials Science, Multidisciplinary
Fang Deng, Jian Ye, Yanling Liu, Tianxiao Zhang, Yishun Liao, Shengwen Tang
Summary: Phosphogypsum is an industrial waste that causes environmental problems and is mainly used for producing building materials. However, the mechanical strength and water resistance of phosphogypsum-based materials are poor, resulting in low utilization in the construction industry. To address this issue, various additives were mixed with phosphogypsum to enhance the water resistance and mechanical strength of the composite cementitious materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Green & Sustainable Science & Technology
Tomasz Zdeb, Tomasz Tracz, Marcin Adamczyk
Summary: According to EU regulations, waste from municipal sewage treatment should be managed in an environmentally friendly manner. A preliminary verification was conducted to determine if this waste could be disposed of by including it in cement composites. Test results showed that replacing 10% of the cement with this waste had a positive effect on its mechanical and durability properties, but higher proportions led to a clear deterioration.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
H. Majdoubi, R. Makhlouf, Y. Haddaji, M. Nadi, S. Mansouri, N. Semllal, M. Oumam, B. Manoun, J. Alami, H. Hannache, Y. Tamraoui
Summary: Phosphogypsum (PG) is a major by-product of the phosphate industry, which limits its wide development. Incorporating PG as a reinforcement agent into geopolymer cement can significantly enhance its mechanical and microstructural properties, contributing to a sustainable geopolymer-PG based circular economy. In this study, geopolymer reinforced PG composites were prepared at different PG contents, and their mechanical properties were tested. The results showed a significant improvement in compressive and flexural strength with the addition of PG, attributed to the crack self-healing mechanism and the high adhesion between PG and the geopolymer matrix.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Environmental Sciences
Yuwei Yan, Yulu Yu, Jingke Sima, Chunnu Geng, Jie Yang
Summary: Microplastics (MPs) undergo aging processes in the environment, but the mechanical fragmentation behavior of MPs and their interaction with heavy metals remained unclear. This study simulated mild and severe mechanical fragmentation of MPs (PS, PP, PET) and found that it significantly affected their morphology. The aging degree of MPs was influenced by particle size, surface area, heat resistance, hydrophilicity, and oxygen-containing functional groups. The carbonyl index (CI) and O/C ratio were used to measure aging degree, and the mechanism and discrepancy between the two treatments were proposed. The adsorption capacities of heavy metals increased with the aging degree, and the CI value and O/C ratio played a vital role in estimating the adsorption ability of heavy metals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Bo Zhou, Haiyan Zhu, Shengye Xu, Guanhong Du, Shi Shi, Min Liu, Feng Xing, Jun Ren
Summary: The study investigates the feasibility of incorporating phosphogypsum in magnesium potassium phosphate cement, showing that phosphogypsum addition can improve workability and extend setting time, while slightly reducing compressive strength at higher content due to loose microstructure. The addition of phosphogypsum does not alter hydration product formation, but decreases hydration heat, and significantly reduces leached heavy metal concentration compared to phosphogypsum after 28 days curing.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Fatima Akfas, Abdellatif Elghali, Jean-Louis Bodinier, Fleurice Parat, Manuel Munoz
Summary: Phosphoric acid manufacturing generates large amounts of phosphogypsum (PG), a by-product generally disposed without any pretreatment. Phosphogypsum may contain valuable elements such as rare earth elements (REEs). This study aims to evaluate the trace element release rate from PG under atmospheric conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Construction & Building Technology
Hamdy A. Abdel-Gawwad, Samah A. Mohamed, Hala S. Hussein, Mohamed A. Arif, Mona S. Mohammed
Summary: An eco-sustainable approach of using alkali-activated slag (AAS) was applied for the full disposal of Ni and Cr (VI) wastewater, showing both compressive strength gain and loss depending on the type of activator used. The wastewater-activated mixtures demonstrated lower drying shrinkage values compared to control samples mixed with tap water. Ni and Cr were stabilized within the AAS microstructure through cationic exchange or localization mechanisms, resulting in concentrations below regulatory limits in leachates after 28-day curing. This strategy not only effectively disposed of heavy metals but also produced cementitious materials resistant to harmful sulfur-oxidizing Aspergillus Niger fungal strain for potential applications in microorganism-rich environments.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Materials Science, Characterization & Testing
Jie Zhang, Chao Wei, Jingyu Ran, Yang Li, Jiajun Chen
Summary: Phosphogypsum polymer composites offer a solution to environmental pollution caused by phosphogypsum stockpiling and improve phosphogypsum utilization. The composites demonstrated good compatibility between phosphogypsum and polymer, and exhibited improved mechanical and thermal properties. They can be used as high-quality raw materials for building drainage pipes.
Article
Materials Science, Multidisciplinary
Qiu-song Chen, Shi-yuan Sun, Yi-kai Liu, Chong-chong Qi, Hui-bo Zhou, Qin-li Zhang
Summary: The study evaluated the feasibility of using cemented paste backfill for the remediation of phosphogypsum and examined fluorine immobilization mechanisms. Through physico-chemical analyses, it was discovered that calcium silicate hydrate gel is associated with fluorine retention. However, further modifications are needed for the simulation to be used as a predictive tool for phosphogypsum management options.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Environmental Sciences
Kate D. Weiksnar, Kyle A. Clavier, Nicole M. Robey, Timothy G. Townsend
Summary: A study found that fresh phosphogypsum (PG) has higher total metal concentrations compared to PG disposed of in stacks. The pH values of stack samples were not linearly related to sample age, but stack samples with pH values similar to fresh samples had lower concentrations of total inorganic metals, suggesting the role of process water drainage and stack location in the reusability of PG.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Changtao Chen, Hanxiao Zheng, Shengwei Tang, Tao Zhang, Li Lv
Summary: Phosphoric acid process can efficiently decompose phosphate ore, avoiding the generation of phosphogypsum. The concentration of phosphoric acid is the most important factor affecting the decomposition efficiency, followed by reaction temperature and time. Controlling the dissolution of Ca(H2PO4)2 can reduce phosphorus loss and produce clean gypsum.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Environmental
Chengcheng Fan, Baomin Wang, Yi Qi, Ze Liu
Summary: A novel binder system using MgO and silica fume was developed for solidification/stabilization of MSWI fly ash. The blend showed good compressive strength and controlled leaching behavior of heavy metals, providing a promising method for immobilization of heavy metals in MSWI fly ash.
Article
Engineering, Environmental
Huiqin Zhang, Zixian Wang, Chenyu Du, Wenlong Liu, Andrea R. Gerson, Kewu Pi
Summary: This study investigated the pyrolysis of sludge into leachate sludge-derived biochar (LSDB) and found that the microstructural changes were primarily due to decomposition of various compounds. Heavy metals in LSDB were present as surface precipitates rather than surface complexation, leading to low leaching contents below discharge standards.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Chemistry, Physical
Imed Ben Salah, Ali Sdiri, Moufida Ben M'barek Jemai, Mabrouk Boughdiri
APPLIED CLAY SCIENCE
(2018)
Editorial Material
Geosciences, Multidisciplinary
Ali Sdiri, Jose Pinho, Chavalit Ratanatamskul
ARABIAN JOURNAL OF GEOSCIENCES
(2018)
Article
Geosciences, Multidisciplinary
Bochra Brik, Abdelwaheb Aydi, Chadia Riahi, Ali Sdiri, Kamel Regaya
ARABIAN JOURNAL OF GEOSCIENCES
(2018)
Article
Chemistry, Multidisciplinary
Haithem Bel Hadjltaief, Ali Sdiri, Wahida Ltaief, Patrick Da Costa, Maria Elena Galvez, Mourad Ben Zina
COMPTES RENDUS CHIMIE
(2018)
Article
Green & Sustainable Science & Technology
Ali Sdiri
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2018)
Editorial Material
Environmental Sciences
Achraf Ghorbal, Ali Sdiri, Boubaker Elleuch
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2019)
Article
Environmental Sciences
Souad Athman, Ali Sdiri, Makhlouf Boufatit
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2020)
Article
Environmental Sciences
L. Khalfa, A. Sdiri, M. Bagane, M. L. Cervera
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2020)
Article
Environmental Sciences
Samia Khadhar, Ali Sdiri, Anis Chekirben, Rim Azouzi, Abdelkarim Charef
ENVIRONMENTAL POLLUTION
(2020)
Article
Green & Sustainable Science & Technology
Leila Khalfa, Ali Sdiri, Mohamed Bagane, Maria Luisa Cervera
Summary: A natural clay material from southern Tunisia was used as a low cost sorbent in a column-wise removal of metal pollutants, showing promising results for sustainable wastewater treatment strategies. Column adsorption experiments were carried out for production of cleaner effluents and understanding of main removal mechanisms through a dynamic methodology.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Raja Zmemla, Mounir Benjdidia, Ikram Naifar, Chaouki Sadik, Boubaker Elleuch, Ali Sdiri
Summary: An integrated approach for sustainable use of phosphogypsum byproducts as road materials has been developed, focusing on evaluating the potential application of phosphogypsum-based material for road base layers. The study addressed physico-chemical properties, mechanical strengths, and environmental aspects, indicating that cement-stabilized material showed higher strength values and potential environmental remediation benefits.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2022)
Article
Materials Science, Ceramics
Youssef Arkame, Achraf Harrati, Mohamed Jannaoui, Yassine Et-Tayea, Imane Yamari, Ali Sdiri, Chaouki Sadik
Summary: This study focuses on the synthesis of basic porous ceramics from Moroccan dolomite and describes the effect of adding slag on the technological and mechanical properties of the final product. By investigating the sintering temperature, the morphology, composition, technological properties, resistance to flexural stress, and chemical resistance of the ceramics were evaluated.
Article
Materials Science, Ceramics
Youssef Arkame, Achraf Harrati, Yassine Et-Tayea, Ahmed Manni, Fahd Oudrhiri Hassani, Abdeslam El Bouari, Ali Sdiri, Iz-Eddine El Amrani El Hassani, Chaouki Sadik
Summary: This work focuses on the characterization of lizardite and studying the technological and dielectric features of ceramics based on this geomaterial. The evaluation of the optimized ceramic materials shows that good dielectric and mechanical properties are obtained when sintered at a temperature of 1100 degrees C.
Article
Engineering, Chemical
Haithem Bel Hadjltaief, Ali Sdiri, Maria Elena Galvez, Haythem Zidi, Patrick Da Costa, Mourad Ben Zina