Article
Environmental Sciences
Lijun Wu, Weifeng Yue, Nengzhan Zheng, Mengshen Guo, Yanguo Teng
Summary: Through batch desorption experiments, this study investigated the release characteristics of heavy metals (Cd, Cu, and Zn) under different salt types and concentrations. The results showed that different salts had different impacts on metal release, and the presence of ferromanganese oxides in the soil favored the release of Cd and Zn under salt treatments. Moreover, the redox potential was an important factor affecting Cu release. The study also highlighted the influence of background metal values on metal release. Overall, this study provides important insights for controlling heavy metal pollution in salinization and coastal soils.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zhipu Wang, Rong Shen, Shibo Ji, Like Xie, Haibing Zhang
Summary: The study demonstrates that biochar derived from sewage sludge/cotton stalks is more effective in immobilizing heavy metals and improving phytoavailability in soil compared to biochar derived from sewage sludge alone. Additionally, it shows that both biochar amendments can enhance soil characteristics and promote plant growth.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Hongqiang Liu, Pan Chen, Hongbin Wang, Yaohui Yang, Yulun Wu
Summary: The influence of pH conditions and simulated inter-root environmental solutions on heavy metal release from contaminated soils was investigated. Soil leaching of heavy metals was found to be more likely under acidic conditions, with a risk of sustained presence in the inter-root solution. Soil washing experiments showed that ethylenediaminetetraacetic acid disodium salt (EDTA) had higher removal efficiency for heavy metals compared to other agents tested. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) analysis suggested that EDTA was particularly effective in removing steady-state Pb, while citric acid had an insignificant effect. EDTA also showed significantly higher removal efficiency for Zn and Cu compared to citric acid.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Green & Sustainable Science & Technology
Barbara Klik, Zygmunt M. Gusiatin, Dorota Kulikowska
Summary: The study compared the efficiency of sewage sludge-derived washing agents (SS_WAs) with Na(2)EDTA in removing heavy metals from soil. It found that SS_WAs effectively removed heavy metals, increased soil organic content, and did not inhibit seed germination or root growth. In contrast, Na(2)EDTA inhibited plant growth and only slightly increased soil microbial activity.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Horticulture
Filip Kovar, Katerina Smutna, Adam Hruska, Ivan Koutnik, Martina Vrablova
Summary: Air pollution is a worldwide problem that affects human and wildlife health through the deposition of pollutants in the atmosphere. Heavy metals, which have high toxicity, persistence, and bioaccumulation, are significant pollutants. In an environment polluted by industry and transportation, heavy metals are deposited on plant leaves and subsequently taken up by plants. The leaf cuticle, which acts as a barrier between plant tissue and the atmosphere, plays a crucial role in the adsorption and diffusion of heavy metals. This study investigated the adsorption and permeability of heavy metals on enzymatically isolated cuticles of Ficus elastica and found significant differences in adsorption capacity and mechanisms among different metals.
SCIENTIA HORTICULTURAE
(2023)
Article
Environmental Sciences
Antonio Pescatore, Chiara Grassi, Andrea Maria Rizzo, Simone Orlandini, Marco Napoli
Summary: The study found that biochar amendment effectively reduced heavy metal concentrations in urban soil and increased plant yield. Berseem clover was effective in remediation of chromium, nickel, and lead contaminated soil, but not for cadmium and zinc.
Article
Engineering, Environmental
Piotr Gutwinski, Grzegorz Cema, Aleksandra Ziembinska-Buczynska, Karolina Wyszynska, Joanna Surmacz-Gorska
Summary: The study found that in anaerobic ammonia oxidation process, zinc is the main metal responsible for inhibition, and removing zinc from incoming sewage can restore the efficiency of the process.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Zhe Wang, Wen Li, Liling Wang, Yi Zhang, Jiake Li, Yuling Liu
Summary: RSDZ, derived from construction residual soil, was prepared through a fusion-hydrothermal process and showed promising adsorption performance for heavy metal ions. The competition studies revealed that RSDZ had higher affinity for Pb2+ and Zn2+ than for Cu2+, likely due to their larger ionic radius and relative atomic weight. Ion exchange was identified as the main mechanism for heavy metal ion adsorption by RSDZ.
Article
Agronomy
Malgorzata Suska-Malawska, Assem Vyrakhamanova, Marya Ibraeva, Maksat Poshanov, Marcin Sulwinski, Kristina Toderich, Monika Metrak
Summary: The southern part of Kazakhstan has significant issues with salinization in irrigated lands, with cadmium contamination in soil primarily stemming from polluted irrigation water.
Article
Environmental Sciences
Mariam K. Al-Lami, Nadege Oustriere, Eva Gonzales, Joel G. Burken
Summary: The extreme characteristics of mine tailings, such as prohibiting microbial processes and natural plant growth, pose a challenge for revegetation. This study investigated the efficacy of co-application strategies targeting biosolids (BS) and carbon-rich amendments (biochar or humic substances) to restore a slightly alkaline multi-metal tailings with bioenergy crops (poplar, willow, and miscanthus). The results showed that co-applying BS and biochar efficiently reduced metal bioavailability and uptake, especially for lead. Poplar and willow exhibited superior phytostabilization efficiency compared to miscanthus. The co-application of amendments improved nutrient cycling, water purification, and contamination control services.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
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
Da-Mao Xu, Rong-Bing Fu, Jun-Xian Wang, Bai-Hong An
Summary: This study investigated the potential roles of soil mineralogy identified by MLA in predicting the geochemical behavior of toxic metals in smelter polluted soils. The results revealed the leaching concentrations of As, Pb and Zn at different pH values, with the second order model providing the best description for the release patterns of main metal contaminants. The study also demonstrated a typical geochemical pattern of As predominantly controlled by fayalite and highlighted the importance of soil remediation and risk management for smelter contaminated sites.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Peipei Song, Wenjing Ma, Xiaoyu Gao, Shiyun Ai, Jun Wang, Wenrong Liu
Summary: This study investigates the performance of rice straw-derived biochar-supported nanoscale zero-valent iron composite in the remediation of heavy metal-contaminated soil. The results demonstrate that this composite has a better immobilization effect on heavy metals, and it can increase soil parameters such as pH, available iron, cation exchange capacity, and soil enzyme activities. The study also reveals the mechanism of immobilization, including surface adsorption, electrostatic attraction, and ion exchange.
JOURNAL OF CLEANER PRODUCTION
(2022)
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
Engineering, Environmental
Tuan Nguyen Quoc, Jeong Wook Kim, Zahra Derakhshan Nejad, Thao Le Thanh, Myung Chae Jung
Summary: The effects of cost-effective amendments and their composites on remediating heavy metals-contaminated soils were investigated. It was found that the composite amendments effectively immobilized heavy metals, induced plant growth parameters, and improved the microbial diversity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Textiles
I. M. G. Bertelsen, L. M. Ottosen
Summary: The study aims to investigate the potential of using recycled polyethylene (R-PE) fibres from waste fishing nets as fibre reinforcement in gypsum-based materials. Mechanical tests showed that the addition of R-PE fibres led to a small reduction in compressive and flexural strength but a significant increase in post-crack performance. Therefore, gypsum-based materials with R-PE fibres have the potential for use in non-structural elements requiring increased ductility and post-crack performance.
FIBERS AND POLYMERS
(2022)
Article
Electrochemistry
Ana T. Lima, Lisbeth M. Ottosen
Summary: This study uses electrodialytic remediation (EDR) to extract rare earth elements (REE) from coal fly ashes. By adding citric acid as an assistant agent, the study achieves a high REE extraction rate of up to 40%, with an energy efficiency of 70 Wh per 100 g of treated coal ash.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Chemical
Henrik K. Hansen, Zenovia Neira, Claudia Gutierrez, Andrea Lazo, Pamela Lazo, Marcela E. Hansen, Mario Ollino, Cecilia Caneo, Lisbeth M. Ottosen
Summary: This study investigates the oxidation of As(III) to As(V) in copper smelter wastewater using in situ-generated ozone. The optimal conditions for efficient oxidation were determined as pH 2 and moderate oxygen flow rate. The complete oxidation of As(III) was achieved in both synthetic and real wastewater.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Environmental Sciences
Andrea Lazo, Pamela Lazo, Alejandra Urtubia, Maria Gabriela Lobos, Henrik K. Hansen, Claudia Gutierrez
Summary: This study evaluated the ability of certain endemic species in Chile to remove metals from abandoned mine tailings. The results showed that the plants have the ability to stabilize zinc and concentrate chromium. However, their ability to translocate metals was weak. Improvements are needed to enhance the removal efficiency of these species for target metals.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
P. E. Jensen, G. M. Kirkelund, J. Fritt-Rasmussen, L. M. Ottosen
Summary: This study presents an initial screening of electrodialytic remediation (EDR) for heavy metal-contaminated anaerobic freshwater sediments. The results indicate that EDR can successfully extract all investigated elements from freshwater sediments, with potential applications in remediation. The carbonate content is the main governing parameter affecting the remediation efficiency, with higher carbonate content sediments requiring longer treatment times. The stack setup showed superior performance in terms of energy consumption and remediation time compared to batch treatment.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Environmental Sciences
Kristine B. Pedersen, Tore Lejon, Pernille E. Jensen, Lisbeth M. Ottosen, Marianne Frantzen, Anita Evenset
Summary: The study investigated the factors influencing metal leaching during submarine tailings discharge, revealing low leaching rates but highlighting the need to estimate the quantity of metals leached in planned discharge scenarios. Future climate change is predicted to increase metal leaching, underscoring the importance of monitoring metal concentrations in water to determine their fate.
MARINE POLLUTION BULLETIN
(2022)
Article
Engineering, Chemical
Rodrigo Ortiz-Soto, Daniela Leal, Claudia Gutierrez, Alvaro Aracena, Marcelo Leon, Andrea Lazo, Pamela Lazo, Lisbeth Ottosen, Henrik Hansen
Summary: Based on the use of electrokinetic remediation technique (EKR), this study assessed the migration of heavy metal contaminants from fresh mine tailings. The impacts of electric field intensity and pH on the migration of copper, nickel, and cobalt species were examined. It was found that under specific conditions of electric field intensity and pH, the removal rates of cobalt, copper, and nickel were 7%, neglectable, and 6% respectively. The highest concentrations by migration at the cathodic zone were 11%, 31%, and 30% respectively.
Article
Biochemistry & Molecular Biology
Henrik K. Hansen, Claudia Gutierrez, Jorge Leiva Gonzalez, Andrea Lazo, Marcela E. Hansen, Pamela Lazo, Lisbeth M. Ottosen, Rodrigo Ortiz
Summary: A combined electrodialysis and electrocoagulation process can simultaneously recover copper and remove arsenic from wastewater, making it a promising tool for treatment.
Review
Chemistry, Physical
Sara Tominc, Vilma Ducman, Wolfgang Wisniewski, Tero Luukkonen, Gunvor M. Kirkelund, Lisbeth M. Ottosen
Summary: This review provides an overview of methods to extract valuable resources from the ash fractions of various sources. It emphasizes the importance of tapping into secondary sources and prioritizes extraction technologies that have an optimum environmental profile. The review also focuses on potential applications for the mineral residues left after extraction.
Article
Green & Sustainable Science & Technology
Lisbeth M. Ottosen, Gunvor M. Kirkelund, Pernille E. Jensen, Kristine B. Pedersen
Summary: This paper investigates the optimization of experimental parameters for phosphorus extraction from secondary sources using the two-compartment electrodialytic extraction (2C-ED) method. The chemometric modeling analysis reveals the influence order of variables such as current, duration, L:S ratio, stirring velocity, and dispersion solution on phosphorus extraction. Contour plots are used to explore different phosphorus extraction strategies.
Article
Ecology
Katharina J. Kreissig, Jonas Steenholdt Sorensen, Pernille Erland Jensen, Lisbeth Truelstrup Hansen
Summary: Seaweed from Greenland has potential as a food source, but it may become contaminated by human pathogens due to the discharge of human sewage into the sea. This study investigated the effect of wastewater discharge on the bacterial communities of wild populations of Fucus sp. in two different communities in Greenland. The results showed significant differences in the microbiota of seaweed harvested in areas with and without wastewater discharge, indicating the presence of human pathogens in the contaminated seaweed.
REGIONAL STUDIES IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Lisbeth M. Ottosen, Dines Thornberg
Summary: A new design for the two-compartment electrodialytic extraction (2C-ED) process has been developed for the simultaneous extraction of phosphorous and separation of heavy metals from sewage sludge ash (SSA). The new reactor design allows for the suspension of SSA at a low liquid-to-solid (L:S) ratio without settling, resulting in a more efficient use of the applied current compared to previous laboratory setups. This new design shows potential for scaling up the 2C-ED process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Public, Environmental & Occupational Health
Judith Y. A. Marechal, Kare Hendriksen, Lisbeth Truelstrup Hansen, Casper Gundelund, Pernille Erland Jensen
Summary: This study examined the water supply situation in rural Greenland and found that while the supply of drinking water is sufficient and affordable, access is severely restricted due to lack of piping. Residents of un-piped households have insufficient water consumption to sustain public health and this could lead to water quality degradation.
INTERNATIONAL JOURNAL OF CIRCUMPOLAR HEALTH
(2022)
Article
Construction & Building Technology
Torben Valdbjorn Rasmussen, Tessa Kvist Hansen, Yvonne Shashoua, Lisbeth M. Ottosen, Louise Green Pedersen, Jens Kromann Nielsen, Frederik R. Steenstrup
Summary: This study assessed nine different vapor barrier systems using polyethylene (PE) membranes of different materials and evaluated their chemical and mechanical properties, as well as their aging characteristics. The results showed no significant differences in the aging properties among the various membranes.