Article
Mining & Mineral Processing
Guanghui Li, Min Li, Xin Zhang, Pengxu Cao, Hao Jiang, Jun Luo, Tao Jiang
Summary: By synthesizing a composite material of crystalline zeolites and amorphous calcium silicate hydrate directly from fly ash, superior adsorption properties for various heavy metals can be achieved. However, competitive adsorption in multi-ion solutions results in a reduction of adsorption capacity.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Asma S. Al-Wasidi, Ahmed M. Naglah, Fawaz A. Saad, Ehab A. Abdelrahman
Summary: A new composite material was synthesized using waste resources, which shows efficient adsorption and preconcentration properties for lead, copper, and zinc ions. The experimental results demonstrate excellent performance of the composite material in metal ion removal, along with good reproducibility and regeneration capabilities.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Engineering, Chemical
Fang Qi, Ganyu Zhu, Yimin Zhang, Xinjuan Hou, Shaopeng Li, Chennian Yang, Jianbo Zhang, Huiquan Li
Summary: By utilizing a characteristic silicon-rich lye, calcium silicate hydrate with high silicon conversion efficiency was synthesized through a simple and easy caustic-crystallization method. The unique porous structure of the C-S-H allowed for efficient recovery of heavy metals from industrial wastewater, showcasing its potential for promoting sustainable development through valuable resource conversion and recycling.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Fei-Fei Chen, Yan Liang, Linnan Chen, Xiao Liang, Ya-Nan Feng, Jin Wu, Ying-Jie Zhu, Yan Yu
Summary: The study presents an adsorbent-to-photocatalyst conversion strategy, using one-unit-cell calcium silicate hydrate (CSH) nanosheets as adsorbents that are transformed into metal sulfides after heavy metal removal, particularly producing CdS nanoparticles in the case of Cd2+ ions. This strategy not only improves water and air pollution but also generates valuable chemical feedstock (CO and H-2).
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Hao Liu, Yajun Wang, Xiaohan Ren, Huanhuan Xu, Juan Chen
Summary: Sewage sludge combustion experiments were conducted to investigate the migration and transformation of Zn, Mn, and Cr, and the results showed that temperature, atmosphere, and steam concentration had significant effects on the process.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Sirisha Nallakukkala, Adeel Ur Rehman, Dzulkarnain B. Zaini, Bhajan Lal
Summary: This article reviews the latest advances in heavy metal removal treatment systems for industrial wastewater, with a particular focus on the innovative gas hydrate-based method. The advantages and limitations of conventional physicochemical techniques are also evaluated. The study suggests that gas hydrate-based treatment technology may be the future of water management.
Article
Environmental Sciences
Qiuyun Huang, Qingwei Wang, Xueming Liu, Xiaoqin Li, Jiayi Zheng, Huiqin Gao, Li Li, Wenbin Xu, Shi Wang, Mengqin Xie, Yongli Xiao, Zhang Lin
Summary: A chlorinating roasting method was developed to treat electroplating sludge containing multiple heavy metals. By adding CaCl2, Zn and Cu were volatilized while Cr was oxidized and retained in the solid phase. The recovery percentage of Zn, Cu, and Cr was high, and further extraction and purification resulted in high purity of Cr and Zn.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Kaan Isinkaralar, Ismail Koc, Ramazan Erdem, Hakan Sevik
Summary: The principal problem in dense cities is air pollution and the damage to the environment caused by it. Roadside landscape plants are exposed to high concentrations of air pollutants, such as chromium, cadmium, and zinc. This study aimed to determine the concentration changes of these pollutants in different organs and washing status using 14 common landscape species. The results showed that Chamaecyparis lawsoniana (A. Murr.) Parl. had better biomonitoring features for heavy metal accumulation among all species.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Environmental Sciences
Ruohan Zhao, Bing Wang, Pan Wu, Qianwei Feng, Miao Chen, Xueyang Zhang, Shengsen Wang
Summary: Heavy metals pollution in water caused by industrial processes and human activities has become a global concern, highlighting the need for an environmentally friendly and efficient remediation method. In this study, a calcium alginate-nZVI-biochar composite (CANRC) was prepared using calcium alginate entrapment and liquid-phase reduction method to remove Pb2+, Zn2+, and Cd2+ from water. The effects of various factors on the adsorption process were investigated, and the physicochemical properties of CANRC before and after adsorption were characterized using SEM-EDS, XRD, and XPS. Different adsorption models and site energy analysis were used to understand the mechanisms involved. The results showed that CANRC prepared at 300°C and a 5 wt% Fe loading ratio exhibited the highest adsorption capacities for Pb2+, Zn2+, and Cd2+, with surface complexation and precipitation identified as the main adsorption mechanisms. This study provides an alternative approach for the removal of heavy metals from water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Bingyang Tian, Yanchao Cui, Juan Zhao, Minghui Liu, He Shang, Wencheng Gao, Jiankang Wen, Jiayu Ma
Summary: The recovery of heavy metals from electroplating sludge not only reduces environmental damage, but also avoids the wastage of resources. In this study, alkali-leaching dealumination and a two-stage roasting water leaching process were combined to selectively recover Ni, Cu, Zn, and Cr from electroplating sludge. The results showed that this approach provides a novel, simple, and efficient method for the selective recovery of heavy metals.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Zobia Razzaq, Muhammad Hamayun, Shahzad Murtaza, Samia Kausar, Ataf Ali Altaf, Rizwan Ullah Khan, Tehzeen Javaid
Summary: This study investigates the use of activated carbons from virgin banana peduncle (ZR1) and iron-impregnated banana peduncle (ZR2) as adsorbents for the removal of As(V) and Cr(VI) ions from aqueous solutions. The adsorbents were characterized and the effects of various factors on metal ion adsorption were studied. The results showed that ZR1 and ZR2 had good adsorption capacities for both As(V) and Cr(VI) ions. Kinetic and thermodynamic parameters demonstrated the feasibility of the adsorption process, making ZR1 and ZR2 promising and cost-effective biosorbents for removing As(V) and Cr(VI).
Article
Environmental Sciences
Pamodithya Wijeyawardana, Nadeeshani Nanayakkara, David Law, Chamila Gunasekara, Anurudda Karunarathna, Biplob Kumar Pramanik
Summary: Using biochar as a partial replacement for Portland cement shows promise for mitigating environmental impacts. This study explores the effects of biochar type, percentage addition, and particle size on the removal of Cu, Pb, and Zn, as well as compressive strength in cementitious materials. The results indicate that biochar does not negatively impact heavy metal removal and can be used as a cement replacement, although the high pH needs to be neutralized before safe discharge.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
I. V. N. Rathnayake, Thilini Munagamage, A. Pathirathne, Mallavarapu Megharaj
Summary: A biosensor array using microalgae and cyanobacteria was developed to detect metals in aquatic systems, showing potential for rapid and efficient multi-metal detection. The array demonstrated optimal conditions for exposure time, storage stability, pH levels, and metal mixtures, providing valuable insights for environmental monitoring.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Taotao Qiang, Boqiang Qiu, Lu Chen, Longfang Ren
Summary: A novel adsorbent for Cr(VI) removal from aqueous solutions was prepared by modifying the 2D Ti3C2/chitosan composite with disodium ethylenediaminetetraacetate (EDTA center dot 2Na) agent. Various characterization methods confirmed the successful loading of chitosan onto Ti3C2. Batch adsorption experiments demonstrated the adsorption performance of the optimal sample, and the adsorption process was analyzed using kinetics and isotherm model. XPS analysis showed reduction of Cr(VI) to Cr(III), reducing its biological toxicity. The adsorbent exhibited good stability and potential application in Cr(VI)-containing wastewater treatment.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Pinki Punia, R. K. Aggarwal, Rakesh Kumar, Rakesh Dhar, Preeti Thakur, Atul Thakur
Summary: This study investigated the adsorption of heavy metals (Cd and Cr) from industrial wastewater using a series of Ca-substituted nickel zinc nanoferrites (CaxNi0.4Zn0.6-xFe2O4 (x = 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6)) (CNZNFs). The effect of calcium doping and contact time on the adsorption of cadmium and chromium ions was examined, and the prepared nanoadsorbents showed high removal efficiencies for both Cd (98.25%) and Cr (51%) ions. Structural analysis confirmed the formation of spinel structured nanoparticles with varying crystallite size and porosity depending on the calcium concentration. The adsorption data was well fitted by the pseudo second order kinetic model and Langmuir isotherm model, with high adsorption efficiencies of Cd (128.20 mg/g) and Cr (23.54 mg/g) observed. The Langmuir isotherm model showed better fitting than the Freundlich isotherm model due to higher correlation coefficients for both heavy metals.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Claudia Wrozyna, Juliane Meyer, Martin Dietzel, Werner E. Piller
Summary: Calcitic valves of non-marine ostracodes are important geochemical archives. Investigations of the relationship between the ranges of oxygen and carbon isotope values of modern ostracode populations and their host water provide important information on local or regional conditions and influences. In this study, we analyzed the oxygen and carbon isotope values of the freshwater ostracode species Cytheridella ilosvayi and the isotopic composition of the waters in which they calcified. Our findings suggest a seasonal calcification pattern of Cytheridella in its geographical range.
Article
Multidisciplinary Sciences
Andre Baldermann, Santanu Banerjee, Gyorgy Czuppon, Martin Dietzel, Juraj Farkas, Stefan Lohr, Ulrike Moser, Esther Scheiblhofer, Nicky M. Wright, Thomas Zack
Summary: Retrograde clay mineral reactions, particularly glauconite formation, play a significant role in element sequestration in marine sediments. The study reveals that glauconite formation in shallow marine environments leads to substantial element sequestration, with sequestration rates two orders of magnitude higher than deep-sea settings. It is estimated that global uptake of K, Mg, Al, Fe, and Si through glauconite formation in shallow-water environments is half of the estimated Mesozoic elemental flux.
NATURE COMMUNICATIONS
(2022)
Article
Geochemistry & Geophysics
Esther Scheiblhofer, Ulrike Moser, Stefan Loehr, Markus Wilmsen, Juraj Farkas, Daniela Gallhofer, Alice Matsdotter Backstrom, Thomas Zack, Andre Baldermann
Summary: The scarcity of well-preserved and directly dateable sedimentary sequences poses a challenge to inferring the Earth's paleo-environmental evolution. By improving the methods for measuring and interpreting the formation ages of glauconite, a mineral with potential for providing absolute stratigraphic ages for sedimentary sequences, researchers have successfully obtained stratigraphically significant ages for glauconite from a Cretaceous shelfal sequence in northern Germany. The study confirms that glauconite, even in mineralogically complex grains, can preserve pristine ages under burial diagenetic conditions, making it a valuable archive for paleo-environmental reconstructions and direct sediment dating.
Article
Environmental Sciences
Nenad Grba, Andre Baldermann, Martin Dietzel
Summary: This paper aims to demonstrate the efficient adsorbent performance of water purification systems using geo-materials and bio-polymer materials, as well as propose an optimal groundwater remediation technique. It evaluates the individual sorption and immobilization capacities, availability, and cost-efficiency of geo-materials compared to other available sorbents for removing harmful metal ions. The paper introduces sustainable technologies based on natural and tailored silicate-polymerized substances, highlighting their applicability in treating water and solid matter contaminated by heavy metal ions. It discusses the advantages and challenges of using geo-materials and geopolymers in water processing technologies and environmental remediation, emphasizing their performance, sorption capacities, availability, and cost-efficiency. The paper describes various applications, including heavy metal ion removal from contaminated water, immobilization through co-precipitation, and a proposed technology for simultaneous treatment of soil/sediment and groundwater.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2023)
Article
Construction & Building Technology
Marlene Sakoparnig, Isabel Galan, Wolfgang Kusterle, Benedikt Lindlar, Guenther Koraimann, Thomas Angerer, Florian R. Steindl, Lukas G. Briendl, Sebastian Jehle, Johannes Flotzinger, Joachim Juhart, Florian Mittermayr
Summary: This study investigates the dosing of accelerator in the wet-mix shotcrete process and finds that pressure fluctuations lead to changes in the accelerator to concrete ratio. The presence of accelerator layers, as shown by fluorescent tracer distribution, can have detrimental effects on shotcrete properties.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Geochemistry & Geophysics
M. Rafiei, S. C. Lohr, O. Alard, A. Baldermann, J. Farkas, G. A. Brock
Summary: Glauconite, a prevalent authigenic clay mineral found in marine sedimentary successions, has a long history of dating but fell into disfavor due to difficulties in obtaining pure glauconite separates. Recent advancements in sedimentary petrography and reaction cell mass spectrometry offer the potential for rapid in situ Rb-Sr dating of glauconite, but caution is needed due to burial alteration. This study combines mineral mapping, geochemical characterization, and in situ Rb-Sr dating to address the impact of postdepositional alteration on glauconite and proposes a screening approach for identifying well-preserved glauconite grains.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Multidisciplinary Sciences
Mattia Tagliavento, Amelia J. Davies, Miguel Bernecker, Philip T. Staudigel, Robin R. Dawson, Martin Dietzel, Katja Goetschl, Weifu Guo, Anne S. Schulp, Francois Therrien, Darla K. Zelenitsky, Axel Gerdes, Wolfgang Mueller, Jens Fiebig
Summary: Dual clumped isotope analysis of Troodon eggshells reveals temperature variations and supports the hypothesis of endothermic thermophysiology with a heterothermic strategy. Comparisons with modern reptiles and birds indicate physiological differences in the reproductive systems. This study highlights the importance of dual clumped isotope analysis in providing insights into physiological information of extinct vertebrates.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Polymer Science
Nenad Grba, Cyrill Grengg, Mirjana Petronijevic, Martin Dietzel, Andre Baldermann
Summary: Geopolymers are effective binding agents for removing hazardous metal ions from aqueous media. Experimental results show that the removal efficiency of copper ions (Cu2+) by a specific geopolymer is greatly influenced by the pH of the solution. Cu2+ uptake capacities as high as 193 mg/g and 560 mg/g are achieved in acidic and alkaline media, respectively. The uptake mechanism involves Cu2+ substitution and co-precipitation with specific minerals. The Cu-based geopolymers exhibit excellent resistance to ion exchange and acid leaching, suggesting their potential for immobilizing Cu2+ ions.
Article
Geochemistry & Geophysics
Aygun Bayramova, Orhan R. Abbasov, Adil A. Aliyev, Elnur E. Baloglanov, Franziska M. Stamm, Martin Dietzel, Andre Baldermann
Summary: We present geochemical and mineralogical datasets for five new mud volcanoes in Azerbaijan and the Caspian Sea region. The mud heterogeneity of the volcanoes is related to the geological age and different sedimentological strata of the host rocks. All ejects show evidence of chemical alterations via water-rock-gas reactions, such as feldspar weathering, smectite illitization, and the precipitation of various minerals.
Article
Geosciences, Multidisciplinary
Simon Oberhollenzer, Andre Baldermann, Roman Marte, Djemil Mahamat Moussa Tahir, Franz Tschuchnigg, Martin Dietzel, Manfred Nachtnebel
Summary: The microstructure of fine-grained sediments plays a crucial role in the stability of building settlements. In this study, artificial cementation of fine-grained sediments using calcium carbonates is investigated and it is found that this cementation process can increase the soil's stiffness and shear wave velocity, improving its mechanical properties.
Article
Chemistry, Physical
Florian Painer, Andre Baldermann, Florian Gallien, Stefanie Eichinger, Florian Steindl, Reiner Dohrmann, Martin Dietzel
Summary: In this study, the hydrothermal alteration of perlite into zeolites was investigated for water treatment and softening applications. Different types of zeolites were successfully synthesized from perlite powder, and their performance for metal ion removal and water softening was evaluated. The LTA-zeolite derived from perlite exhibited excellent removal capacity and can be applied effectively for water treatment and softening.
