Article
Metallurgy & Metallurgical Engineering
Bei-kai Zhang, Qin-meng Wang, Xue-yi Guo, Qing-hua Tian
Summary: An efficient process using CaCl2 for chlorination roasting was proposed to recover zinc from copper smelting slag. The reaction mechanism and kinetics were investigated by thermodynamic calculation, TG-DSC analysis, and XRD methods. The results showed that the temperatures for oxidative decomposition of CaCl2 and chlorination of Zn-containing phases were above 774.3 and 825 °C, respectively. The chlorination roasting process involved four stages: water precipitation, water extraction, iron oxidation, and zinc chlorination. The activation energies for iron oxidation and zinc chlorination were 101.70 and 84.4 kJ/mol, respectively.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Engineering, Environmental
Liushun Wu, Hui Li, Kunlong Liu, Haiqing Mei, Yunjin Xia, Yuanchi Dong
Summary: Over 50 million tons of copper slag are produced worldwide annually, and the current stacking method for treatment results in resource wastage and environmental issues. This study focused on removing nonferrous metals from copper slag and reducing iron oxide. The experimental results showed that increasing the percentage of the chlorinating agent, temperature, and duration improved the removal percentages of copper, zinc, and lead. The proposed scheme involves chlorination roasting, reduction roasting, and melting to efficiently utilize copper slag.
Article
Metallurgy & Metallurgical Engineering
Xingbang Wan, Leiting Shen, Ari Jokilaakso, Hurman Eric, Pekka Taskinen
Summary: This study focuses on improving metal-slag separation in pyrometallurgical processes through simulation and modeling, since direct observations are not possible. The research investigated the kinetics and mechanisms of chemical reactions between matte droplets and slag at a typical smelting temperature of 1300 degrees C in both air and argon atmosphere. Results in argon atmosphere suggest that the oxidation of cuprous sulfide by ferric ions in the slag strongly contributes to copper losses in the slag.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2021)
Article
Engineering, Chemical
Huibin Zhang, Yanan Wang, Yuzheng He, Shenghang Xu, Bin Hu, Huazhen Cao, Jun Zhou, Guoqu Zheng
Summary: This study introduces an integrated disposition method for handling hazardous arsenic by returning arsenic-bearing byproducts to the copper flash smelting process, achieving a balance of arsenic brought in and out of the copper production system. The research indicates the promising potential of the copper flash smelting process for efficient and safe disposition of arsenic via recirculation processing of arsenic-bearing byproducts.
MINERALS ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Katri Avarmaa, Dan Strengell, Hannu Johto, Petri Latostenmaa, Hugh O'Brien, Pekka Taskinen
Summary: Chromia-bearing raw materials in nickel and copper matte smelting are difficult to process due to solid chromite spinel precipitates. The solubility of chromia in smelting slags and mattes is not accurately known. New data for iron-silicate slags in equilibrium with low-iron nickel mattes have been measured.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2022)
Article
Materials Science, Multidisciplinary
Lyazzat Mussapyrova, Rashid Nadirov, Peter Balaz, Michal Rajnak, Radovan Bures, Matej Balaz
Summary: In this study, room-temperature sulfuric acid leaching of copper smelter slag powder in the presence of potassium dichromate was investigated to selectively extract copper from zinc and iron. Mechanical activation and the Taguchi method were used to enhance copper extraction efficiency. Optimal conditions were determined for both mechanical activation and leaching, leading to efficient recovery of valuable metals from secondary resources.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Review
Green & Sustainable Science & Technology
Wentao Zhou, Xiao Liu, Xianjun Lyu, Wenhao Gao, Huili Su, Chuanming Li
Summary: China's copper resources are characterized by low grade and complex composition, producing a large amount of copper smelting slag (CSS) containing valuable elements such as copper and iron through smelting. Various methods for extracting and separating copper and iron from CSS are reported, including physical and chemical methods. This review provides guidance for the selection and development of secondary resources of CSS.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Metallurgy & Metallurgical Engineering
Kun Wang, Yan Liu, Jun Hao, Zhi-he Dou, Guo-zhi Lv, Ting -an Zhang
Summary: A novel method for recovering copper from copper slag was proposed in this study. By adding SiO2, the reduction temperature of magnetite and pyrite in the slag was significantly reduced, resulting in high copper recovery. Valuable metals such as gold and silver were also recovered, while zinc and lead were volatilized. The fluidity of the slag was improved due to the reduction of magnetite.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Yanglai Hou, Jiajie Yu, Zhiqiao Li, Yuanhao Hai, Ju Xu, Dingli Zheng
Summary: Chromium slag and copper smelting waste slag were used as raw materials to produce black ceramic tiles, reducing environmental pollution and increasing their utilization value. The color characteristics, phases, and microstructure of the ceramic tiles were analyzed, and the effects of different process parameters were investigated. The results showed that the optimal conditions for coloring the ceramic tiles were an Fe/Cr ratio of 1.5, sintering temperature of 1200 degrees C, holding time of 30 min, and cooling in the furnace. The ceramic tiles met the relevant national standards for compressive strength and leaching concentration of Cr(VI).
Article
Computer Science, Interdisciplinary Applications
Hussain Ahmed, Luis A. Ricardez-Sandoval, Matti Vilkko
Summary: This article discusses the optimal scheduling problem in the copper smelting process and proposes two approaches - centralized and hierarchical scheduling frameworks - to address the inter-dependencies between process units. The study shows that the hierarchical framework can find near-optimal schedules and can be applied to similar plant-wide scheduling applications.
COMPUTERS & CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Huihui Zhou, Guijian Liu, Liqun Zhang, Chuncai Zhou
Summary: The separation of copper and arsenic has always been a major issue in the copper slag flotation process, with the presence of arsenic-copper alloys increasing the difficulty of separation, requiring finer grinding. Arsenic is oxidized into arsenate compounds during the process, while the transformation of copper and arsenic speciation affects the selectivity of separation. The study also highlights the risks of heavy metals in FSF slag and its flotation concentrate, emphasizing the need for cautious handling and utilization.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Ruirui Sun, Rong Huang, Jiapeng Yang, Chongqing Wang
Summary: A novel process of waste treatment using magnetic copper smelter slag as a heterogeneous catalyst is proposed, which can effectively degrade tetracycline. The catalyst has a broad operation pH range and is not significantly affected by water quality, showing potential application prospects.
Article
Metallurgy & Metallurgical Engineering
Hui -bin Zhang, Ya-nan Wang, Yin -bin Zhu, Peng Ren, Bin Hu, Sheng-hang Xu, Hua-zhen Cao, Jun Zhou, Guo-qu Zheng
Summary: The accurate understanding of arsenic (As) species distribution and their leaching toxicity in copper smelting slag is crucial for its efficient and safe disposition. Various analytical techniques were employed to investigate the As species in the slag and evaluate their potential toxicity. The results revealed that As existed in various forms in the slag, including water-soluble As, Cu-As intermetallics, Cu-As sulfides, as well as As incorporated in fayalite and glassy silicates. Flotation of readily soluble As and Cu-As intermetallics was effective in reducing the leaching toxicity of slag tailings and meeting the regulatory thresholds for As set by USEPA and SEPA.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Shuoyang Li, Xiaocen Li, Rong Zhu, Yanxiang Li
Summary: The current research on metallurgical remains from Bronze Age period in northeast Yunnan is insufficient. In order to study the smelting technology, samples of slag and mineral excavated from the Yubei Di site were examined and characterized. A simulation was conducted to generate a phase diagram that accurately depicts the melting procedure. The results showed that the slag mainly came from the reduction and smelting process of sulphur-containing copper oxide minerals into copper, indicating a lack of advanced techniques and the use of primitive methods.
Article
Materials Science, Multidisciplinary
Baojun Zhao, Jinfa Liao
Summary: This paper reviews the history of the development of bottom-blowing copper smelting technology in China, which was initiated and developed in the 1990s. The technology involves injecting oxygen-enriched high-pressure gas to stir the molten bath consisting of matte and slag, resulting in rapid reactions at relatively lower temperatures and good adaptability of the feed materials.
Article
Environmental Sciences
Guillermo Gallareta-Olivares, Andrea Rivas-Sanchez, Angelica Cruz-Cruz, Syed Makhdoom Hussain, Reyna Berenice Gonzalez-Gonzalez, Maria Fernanda Cardenas-Alcaide, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: The contamination of the environment by domestic and industrial discharges is a persistent problem that requires innovative solutions. Carbon dots, particularly metal-doped carbon dots, have shown great potential in sensing, adsorbing, and photodegrading pollutants in water samples. This review highlights the importance of altering the electronic structure of carbon dots through metal doping to enhance their capabilities for wastewater treatment.
Review
Chemistry, Applied
Angel M. Villalba-Rodriguez, Lidia Yaritza Martinez-Zamudio, Saul Antonio Hernandez Martinez, Jesus Alfredo Rodriguez-Hernandez, Elda M. Melchor-Martinez, Elda A. Flores-Contreras, Reyna Berenice Gonzalez-Gonzalez, Roberto Parra-Saldivar
Summary: Nanomaterials possess unique properties such as special geometries, higher surface area, and special mechanical, optical, and physicochemical properties, making them important contributors to the development of various technological and industrial sectors. They have increasing interest in biomedical research, particularly in chronic inflammations, disease detection, drug delivery, and infections treatment, where their catalytic applications as nanozymes or nanobiocatalysts play a crucial role. This review discusses the construction of nanozymes and nanobiocatalysts using different forms of nanomaterials, including carbon-based, metal-based, and polymer-based nanocomposites, and examines successful examples of their employment in biomedical research. The analysis of the role of nanomaterials in catalytic applications provides insights into future research directions and practical developments in the field.
TOPICS IN CATALYSIS
(2023)
Review
Chemistry, Applied
Karina G. Coronado-Apodaca, Georgia Maria Gonzalez-Meza, Alberto Aguayo-Acosta, Rafael G. G. Araujo, Reyna Berenice Gonzalez-Gonzalez, Mariel Araceli Oyervides-Munoz, Manuel Martinez-Ruiz, Elda M. M. Melchor-Martinez, Damia Barcelo, Roberto Parra-Saldivar, Juan Eduardo Sosa-Hernandez
Summary: Access to secure water sources is a major challenge for human sustainability, especially with climate change and droughts. Traditional water sources may not be reliable, and recycled wastewater can contain high levels of emerging contaminants. Enzyme-based biosensors have shown promise in detecting toxic elements in water in real time, and have been successfully applied to detect a wide range of pollutants.
TOPICS IN CATALYSIS
(2023)
Review
Chemistry, Analytical
Lizeth Parra-Arroyo, Manuel Martinez-Ruiz, Sofia Lucero, Mariel A. Oyervides-Munoz, Mollie Wilkinson, Elda M. Melchor-Martinez, Rafael G. Araujo, Karina G. Coronado-Apodaca, Hugo Velasco Bedran, German Buitron, Adalberto Noyola, Damia Barcelo, Hafiz M. N. Iqbal, Juan Eduardo Sosa-Hernandez, Roberto Parra-Saldivar
Summary: Wastewater-Based Epidemiology (WBE) is a powerful tool for pandemic surveillance, but the reliability of wastewater results is affected by numerous variables. More comprehensive models are needed to study viral RNA degradation in complex matrices, and wastewater indicators identified through analytical chemistry can be used as health indicators and to determine the initial viral RNA content.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
Article
Biotechnology & Applied Microbiology
Hossein Alishah Aratboni, Nahid Rafiei, Ashanti Concepcion Uscanga-Palomeque, Itza Eloisa Luna Cruz, Roberto Parra-Saldivar, Jose Ruben Morones-Ramirez
Summary: Functionalized gold nanoparticles with sense and antisense oligonucleotides can serve as an optical switch for gene interference in plant cells. Using LED light sources, the release of antisense oligonucleotides through photothermal heating can achieve targeted gene silencing in plant cells. This approach enhances nucleic acid delivery efficiency and allows for temporal control of gene expression in plants.
MICROBIAL CELL FACTORIES
(2023)
Article
Biochemistry & Molecular Biology
Mario Adrian Tienda-Vazquez, Rocio Daniela Soto-Castro, Oscar Carrasco-Morales, Carmen Tellez-Perez, Roberto Parra-Saldivar, Maritza Alonzo-Macias, Anaberta Cardador-Martinez
Summary: Instant controlled pressure drop (DIC) is an emerging technology in food processing that can be used for drying, freezing, and extracting bioactive molecules without damaging their properties. This study evaluated the effects of 13 different DIC treatments on the content of polyphenols, flavonoids, and antioxidant activity in green lentils. The DIC 11 treatment (0.1 MPa, 135 s) resulted in the highest release of polyphenols, which are closely related to antioxidant capacity. The most efficient conditions for DIC to promote the release of phenolic compounds and maintain antioxidant capacity were found to be low pressures (<0.1 MPa) and short times (<160 s).
Review
Environmental Sciences
Saul Antonio Hernandez Martinez, Elda M. Melchor-Martinez, Reyna Berenice Gonzalez-Gonzalez, Juan Eduardo Sosa-Hernandez, Rafael G. Araujo, Jesus Alfredo Rodriguez-Hernandez, Damia Barcelo, Roberto Parra-Saldivar, Hafiz M. N. Iqbal
Summary: The COVID-19 pandemic has led to an increase in the use of psychiatric drugs, which are difficult to degrade and pose potential ecological and toxicological risks. Biocatalysis-assisted techniques can efficiently remove these drugs from water. There are differences in waste management policies for the drug industry between high- and low-income countries.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
E. de la Pena, C. Castillo-Zacarias, R. G. Araujo, M. Rostro-Alanis, R. Parra-Saldivar, J. Rodriguez-Rodriguez
Summary: This study explored the degradation of nonylphenol with Microbial Fuel Cells, and found that the system can remove 9.668±0.168 mg/L of nonylphenol in 21 days. Additionally, bioelectricity generation was demonstrated, with a maximum voltage of 109.6 mV, maximum current of 25.91 μA, power density of 0.6032 mW/m^2, and normalized energy recovery of 3.216 W h/m^3. These results indicate that Microbial Fuel Cells have the potential for the treatment of nonylphenol contaminated waters and will contribute to a sustainable future.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Medicinal
Itzel Y. Lopez-Pacheco, Victoria Guadalupe Ayala-Moreno, Catherinne Arlette Mejia-Melara, Jose Rodriguez-Rodriguez, Sara P. Cuellar-Bermudez, Reyna Berenice Gonzalez-Gonzalez, Karina G. Coronado-Apodaca, Leonardo I. Farfan-Cabrera, Georgia Maria Gonzalez-Meza, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: The production of biomolecules by microalgae has a wide range of applications, and microalgae biomass can be produced using waste in a smaller space, showing its great potential as a source of biomass.
Review
Virology
Alberto Aguayo-Acosta, Mildred G. Jimenez-Rodriguez, Fernando Silva-Lance, Mariel Araceli Oyervides-Munoz, Arnoldo Armenta-Castro, Orlado de la Rosa, Antonio Ovalle-Carcano, Elda M. Melchor-Martinez, Zahra Aghalari, Roberto Parra-Saldivar, Juan Eduardo Sosa-Hernandez
Summary: Although wastewater-based surveillance is an efficient tool, its implementation for pathogen surveillance is limited by ineffective sample treatment procedures and sampling protocols. Passive samplers have emerged as a solution to improve wastewater sampling, but there is still a need for optimization.
Review
Food Science & Technology
Maricarmen Iniguez-Moreno, Reyna Berenice Gonzalez-Gonzalez, Elda A. Flores-Contreras, Rafael G. Araujo, Wei Ning Chen, Mariel Alfaro-Ponce, Hafiz M. N. Iqbal, Elda M. Melchor-Martinez, Roberto Parra-Saldivar
Summary: This article discusses environmentally friendly solutions for postharvest protection of berries, including the use of green chemical compounds, biocontrol agents, physical treatments, and modern technologies. The potential of these alternatives and the challenges for implementing them in the food industry are evaluated. The development of nanotechnology, molecular biology, and artificial intelligence offers opportunities to improve the functionality of coatings using nanostructures.
Review
Plant Sciences
Georgia M. Gonzalez-Meza, Joel H. Elizondo-Luevano, Sara P. Cuellar-Bermudez, Juan Eduardo Sosa-Hernandez, Hafiz M. N. Iqbal, Elda M. Melchor-Martinez, Roberto Parra-Saldivar
Summary: Food production is facing challenges due to the pandemic and climate change, and seaweeds offer a valuable opportunity for sustainable animal feed supply. Seaweeds have traditionally been used in aquafeed, but their demand in the feed market is growing parallel to the increased food demand. They are also being promoted for their nutritional benefits, containing biologically active compounds that contribute to animals' health, growth, and performance. Additionally, seaweeds possess beneficial properties such as antibacterial, antifungal, antiviral, antioxidant, and anti-inflammatory effects, making them potential sources of healthy food ingredients.
Review
Plant Sciences
Elda A. Flores-Contreras, Rafael G. Araujo, Arath A. Rodriguez-Aguayo, Muriel Guzman-Roman, Jesus Carlos Garcia-Venegas, Erik Francisco Najera-Martinez, Juan Eduardo Sosa-Hernandez, Hafiz M. N. Iqbal, Elda M. Melchor-Martinez, Roberto Parra-Saldivar
Summary: Brown macroalgae, due to their abundance, often cause problems in aquatic and terrestrial ecosystems and affect human health and aquatic species. Sargassum, with its high content of biocompounds, has attracted attention in research areas such as food, pharmaceuticals, and cosmetics. Polysaccharides extracted from brown macroalgae have various bioactivities, and different extraction methods are used, including supercritical fluid extraction, pressurized liquid extraction, subcritical water extraction, ultrasound-assisted extraction, enzyme-assisted extraction, and microwave-assisted extraction. This study provides information on extraction methods, purification, and the bioactivities of brown algae polysaccharides, along with the challenges in marketing Sargassum-based products.
Article
Fisheries
Elda M. Melchor-Martinez, Ana G. Reyes, Zoe P. Morreeuw, Elda A. Flores-Contreras, Rafael G. Araujo, Diana Ramirez-Gamboa, Juan Eduardo Sosa-Hernandez, Hafiz M. N. Iqbal, Georgia Maria Gonzalez-Meza, Alfredo Damiano Bonaccorso, Alberto Pena-Rodriguez, Roberto Parra-Saldivar
Summary: Sargassum biomass has high nutritional value and availability, making it a potential ingredient for aquaculture formulations. Adding 2.5% Sargassum to shrimp feed can significantly improve growth performance and digestion efficiency.
AQUACULTURE REPORTS
(2023)
Review
Agricultural Engineering
Raunak Dhanker, Abhishek Saxena, Archana Tiwari, Hans-Uwe Dahms, Pankaj Kumar Singh, Anil Kumar Patel, Jiang-Shiou Hwang, Georgia Maria Gonzalez-Meza, Elda M. Melchor-Martinez, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: Diatoms, with their complex cellular architecture, have diverse applications in fields such as bioremediation, aquaculture, and value-added products. They are proficient in nutrient utilization and can serve as trustworthy indicators of water quality, in addition to producing biomass rich in beneficial substances. This comprehensive review explores the multifaceted applications of diatoms and aims to find greener, more sustainable methods by utilizing their enormous biotechnological potentials.
BIORESOURCE TECHNOLOGY
(2024)