Article
Green & Sustainable Science & Technology
Minh T. Vu, Luong N. Nguyen, Md Abu Hasan Johir, Hao H. Ngo, Catherine Skidmore, Andrea Fontana, Brendan Galway, Heriberto Bustamante, Long D. Nghiem
Summary: The study evaluates a passive and inexpensive process using steel-making slag to remove phosphorus from wastewater, demonstrating its potential for efficient removal and the possibility of further enhancement through process optimization. Phosphorus removal mechanisms mainly include adsorption and chemical precipitation, with the latter dependent on pH and Ca2+ concentration in the aqueous solution.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Isis S. P. C. Scott, Chad J. Penn
Summary: Steel slag has been proven to effectively remove phosphorus and mitigate pollution in freshwater systems. However, the oversimplification of steel slag behavior as a phosphorus sorption material calls for individual characterization of slag samples to determine their phosphorus removal capacity. Coating steel slags with aluminum significantly improved phosphorus removal performance, especially under rapid flows.
Article
Engineering, Chemical
Golam Ismot Ara Taposhe, Leili Tafaghodi Khajavi
Summary: A hybrid process was employed to remove boron and phosphorus from silicon using slag and solvent refining. Quaternary slag of CaO-Al2O3-SiO2-Na2O was used at 1300°C with a slag-to-metal ratio of one. The mass transfer coefficient of B and P in the slag and alloy phases was calculated, and the rate-limiting steps were determined to be mass transport in the liquid slag for B and mass transport in the alloy phase for P.
Article
Metallurgy & Metallurgical Engineering
Qiang Zhao, Baibing Yang, Haowen Ren, Shihong Chen, Chunhui Luo, Quande Li, Wei Yang, Kangping Yan
Summary: The discharge of wastewater containing Cr(VI) and the accumulation of Fe-P slag pose a threat to the environment and human health. This paper proposes an approach that uses Fe-P slag as a reducing agent to completely remove Cr(VI) from the wastewater. Experimental study shows that the temperature and dosage of Fe-P slag significantly affect the reaction kinetics and removal efficiency. A simplified industrial procedure is also proposed for Cr(VI) removal without additional power input.
Article
Green & Sustainable Science & Technology
Fan Wu, Qingliang Yu, F. Gauvin, H. J. H. Brouwers, Changwu Liu
Summary: This study investigates the adsorption characteristics of granular aggregates for potential applications in highly adsorptive concrete. Results show that steel slag exhibits higher phosphorus adsorption capacity and efficiency compared to other materials, making it a suitable aggregate for highly adsorptive concrete manufacturing.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Biotechnology & Applied Microbiology
Minh T. Vu, Hung C. Duong, Qilin Wang, Zhengqing Cai, Ngoc Bich Hoang, Nga Tran Thi Viet, Long D. Nghiem
Summary: This study introduces a new application of steel-making slag in removing residual phosphorus from wastewater through chemical precipitation. The results show that adjusting the pH of the supernatant is crucial for efficient phosphorus removal. By optimizing the pH to 8.5 and using a dosage of 5 g/L of steel-making slag, about 98% of phosphorus can be removed with an output level below 0.1 mg/L. The study also reveals that the enhanced phosphorus removal is attributed to the involvement of adsorption and the presence of inorganic carbon in the supernatant facilitates co-precipitation effects.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Construction & Building Technology
Fan Wu, Qingliang Yu, H. J. H. Brouwers
Summary: By adding porous heat-treated miscanthus and steel slag powders to mortar, the permeability and adsorption performance of the adsorptive mortar can be enhanced, thereby improving the removal capacity of phosphorus.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Environmental Sciences
Jingyao Zhang, Yuanchun Zou, Xiaofei Yu, Shanshan Ding, Jiawen Yan, Yongen Min
Summary: Steel slag substrate constructed wetlands (SSCWs) can effectively remove phosphorus from sewage through Ca-P precipitation and adsorption. Combining steel slag with other substrate materials in SSCWs significantly increased the removal of total nitrogen and ammonium nitrogen, but reduced the removal of total phosphorus. Plant cultivation can compensate for the decline in phosphorus removal and improve the simultaneous removal of nitrogen and phosphorus. Horizontal flow SSCWs achieve higher phosphorus removal capacity compared to vertical flow SSCWs. Operational parameters significantly affect the nitrogen and phosphorus removal capacity of SSCWs.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Chuan-ming Du, Yao-hui Yu, Liu-dong Jiang, Jing-kun Yu
Summary: In this study, acid leaching was used to separate the P-concentrating solid solution from dephosphorization slag. Increasing slag basicity facilitated the enrichment of P2O5. After leaching, the residue containing 57.8% Fe2O3 can be reutilized as a metallurgical feedstock. Through chemical precipitation, a precipitate containing 35.1% P(2)O(5) was recovered from the leachate, which can be used as a phosphate fertilizer. The total recovery efficiency of P from dephosphorization slag in this process reached 95.8%.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Chemical
Mingming Sang, Hengze Zhao, Ye Li, Lingqi Zhu
Summary: Blocky geopolymer derived from steel slag is an effective adsorbent for Cu2+ removal. The adsorption of Cu2+ is influenced by oxygen-containing and silica-containing functional groups on the surface of the adsorbent. Blue flocs containing CuSiO3, Cu2(OH)2CO3, and Cu(OH)2 are attached to the adsorbent surface. The main adsorption mechanisms are electrostatic attraction, ion exchange, and chemical precipitation. The adsorption process of Cu2+ follows the Freundlich isotherm model and the pseudo-first-order kinetic model.
MINERALS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yan Liu, Junjun Su
Summary: This study developed reinforced phosphorus removal materials, Zr-EPRC particles, by improving the formulation of Efficient Phosphorus Removal Composite (EPRC), which is made from modified industrial wastes. Comparative experiments were conducted to optimize the preparation of Zr-EPRC and evaluate its static and dynamic adsorption performance. The results showed that Zr-EPRC exhibited strong phosphorus adsorption capacities and could be a cost-effective solution for wastewater treatment, contributing significantly to reducing eutrophication and improving water quality.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Dai Tang, Petrus Christiaan Pistorius
Summary: The feasibility of using vacuum degassing to remove nitrogen from 3rd Generation Advanced High Strength Steel (AHSS) has been evaluated through collating thermodynamic information, measuring interfacial kinetics, and combining these in a tank degasser model. The high alloy content in AHSS changes the nitrogen removal by tank degassing, affecting both the interfacial reaction rate constant and the activity coefficient of dissolved nitrogen. Isotope exchange technique was used to measure the interfacial nitrogen reaction rate constant for Fe-Si and Fe-Si-Mn compositions. By applying the measured rate constant in the tank degasser model, the effects of steel composition on nitrogen removal and the rate-limiting steps have been evaluated.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Environmental Sciences
Mingwei Liu, Xiao Liu, Weizhuo Wang, Jingbo Guo
Summary: EAF slag aggregate, a waste by-product of the steel industry, has shown great potential for phosphorus removal. This study evaluated the performance of using EAF slag aggregate as an adsorbent for phosphorus removal and identified its removal capacity. Batch tests showed that the highest phosphorus removal capacity can be achieved at pH 12. The adsorption kinetics can be described by a pseudo-second-order kinetic equation and the best fitted isothermal adsorption model is the Freundlich model. A continuous flow column experiment demonstrated that EAF slag could efficiently remove phosphorus with a removal efficiency greater than 95%.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Michael S. Guzman, Jaisree Iyer, Paul Kim, Daniel Kopp, Ziye Dong, Paniz Foroughi, Mimi C. Yung, Richard E. Riman, Yongqin Jiao
Summary: Microbially induced calcium carbonate precipitation (MICP) is an emerging biotechnology that aims to reduce the environmental impact of concrete production. This study explores the mechanisms and conditions of calcium carbonate precipitation through microbial activity and chemical reactions, with the goal of applying it to the manufacture of high-density cement and concrete.
Article
Chemistry, Multidisciplinary
Michael S. Guzman, Jaisree Iyer, Paul Kim, Daniel Kopp, Ziye Dong, Paniz Foroughi, Mimi C. Yung, Richard E. Riman, Yongqin Jiao
Summary: Biocement formed through microbially induced calcium carbonate precipitation (MICP) is a promising biotechnology that aims to reduce the environmental impact of concrete production. This study investigates the microbial, chemical, and thermodynamic factors involved in MICP, and provides important insights for scaling up microbial carbonation of monocalcium silicate to produce high-density cement and concrete.
Article
Environmental Sciences
Zhanna Grebenshchykova, Chloe Fredette, Florent Chazarenc, Yves Comeau, Jacques Brisson
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2020)
Editorial Material
Soil Science
Ning-Jun Jiang, Chao-Sheng Tang, Toshiro Hata, Benoit Courcelles, Osama Dawoud, Devendra N. Singh
SOIL USE AND MANAGEMENT
(2020)
Article
Environmental Sciences
Dominique Claveau-Mallet, Hatim Seltani, Yves Comeau
Article
Engineering, Geological
Fatima Zahra Haouzi, Annette Esnault-Filet, Benoit Courcelles
Summary: This study suggests five strategies of microbially induced calcite precipitation (MICP) to improve the uniformity of treatment and enhance the erosional/hydraulic response of internally unstable and poorly graded soils.
ENVIRONMENTAL GEOTECHNICS
(2022)
Article
Environmental Sciences
A. Jerbi, N. J. B. Brereton, E. Sas, S. Amiot, X. Lachapelle-T, Y. Comeau, F. E. Pitre, M. Labrecque
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Dominique Claveau-Mallet, Yves Comeau
Article
Ecology
Zhanna Grebenshchykova, Jacques Brisson, Florent Chazarenc, Yves Comeau
ECOLOGICAL ENGINEERING
(2020)
Article
Environmental Sciences
Leo Cerclet, Benoit Courcelles, Philippe Pasquier
Article
Engineering, Geological
Ning-Jun Jiang, James L. Hanson, Gabriele Della Vecchia, Cheng Zhu, Yaolin Yi, Dali N. Arnepalli, Benoit Courcelles, Jia He, Suksun Horpibulsuk, Menglim Hoy, Akihiro Takahashi, Arul Arulrajah, Chih-Ping Lin, Osama Dowoud, Zili Li, Zhiwei Gao, Toshiro Hata, Limin Zhang, Yan-Jun Du, Venkata Siva Naga Sai Goli, Arif Mohammad, Prithvendra Singh, Ganaraj Kuntikana, Devendra N. Singh
Summary: This paper discusses the impact of COVID-19 on geotechnical and geoenvironmental engineering education modules and how faculty members have adapted by enhancing teaching and learning experiences through active learning, exploring new content related to public health, expanding e-learning resources, engaging in student-centered assessments, and delivering integrated education and research. Despite challenges with physical distancing and maintaining traditional face-to-face interactions, opportunities for smart learning, flipped learning, and interdisciplinary education have emerged to provide students with a more resilient and technology-based learning environment.
ENVIRONMENTAL GEOTECHNICS
(2021)
Article
Engineering, Environmental
Mohamed-Ali El Kilani, Marouen Jouini, Tsiverihasina V. Rakotonimaro, Carmen Mihaela Neculita, John W. Molson, Benoit Courcelles, Guy Dufour
Summary: The study evaluated the efficiency of passive bioreactors in treating mine drainage in northern climates, concluding that the reactors failed to meet environmental criteria and did not provide favorable conditions for the growth of sulfate reducing bacteria.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Chloe Fredette, Yves Comeau, Jacques Brisson
Summary: This paper discusses the feasibility of applying zero liquid discharge wetland technology to industrial leachate treatment. Through detailed hydrological modeling, the study investigates the impacts of design and management decisions on the scale, efficiency, and feasibility of the technology. The results show that considering evapotranspiration optimization factors is crucial for achieving zero discharge in a humid climate.
Article
Construction & Building Technology
Antoine Laverdiere, Shengpeng Hao, Thomas Pabst, Benoit Courcelles
Summary: Open-pit mining produces a large amount of waste rocks that can be utilized in mining infrastructures. However, current practice leads to punctures, dust generation, and low durability. This study aimed to determine the optimal geotechnical properties of crushed waste rocks for surface course layer. Laboratory tests were conducted, and it was found that fines content, dry density, and maximum particle size significantly influenced the strength of the material. Regression models were proposed to predict the strength of crushed waste rocks based on their physical properties.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Vincent Laroche, Philippe Pasquier, Benoit Courcelles
Summary: The study examines the use of standing column well, a ground source heat pump system that utilizes groundwater as a heat transfer fluid, in urban environments. It finds that standing column wells require less space and are less expensive than traditional ground heat exchangers. Numerical simulations show that infrastructure, such as buildings and roads, have a greater impact on increasing ground temperature than standing column wells. The study concludes that the operation of these systems in an urban context is viable in the short and mid-term.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Plant Sciences
Patrick Benoist, Adam Parrott, Xavier Lachapelle-T., Louis-Clement Barbeau, Yves Comeau, Frederic E. Pitre, Michel Labrecque
Summary: A field trial was conducted to investigate the treatment capability of a willow plantation for landfill leachate. Results showed that the system was highly efficient in removing pollutants and phosphorus amendment improved its performance. The willow biomass also increased significantly with leachate irrigation.
Article
Energy & Fuels
Leo Cerclet, Benoit Courcelles, Philippe Pasquier
Summary: This study calibrates a thermo-hydro-chemical model on experimental data to quantify the factors influencing scaling in a sanding column well. The results indicate that treating a small percentage of the flowrate, sealing the wellhead, and limiting CO2 degassing can significantly reduce precipitated calcite masses.
