Article
Environmental Sciences
Juan Francisco Morales Arteaga, Simon Gluhar, Anela Kaurin, Domen Lestan
Summary: The chemistry of toxic metalloids and metals in soil differs, making their simultaneous removal challenging. In this study, a novel remediation method was used to wash soil contaminated with arsenic (As), lead (Pb), zinc (Zn), and cadmium (Cd) using oxalic acid, Na-dithionite, and EDTA solution. Toxic elements were successfully removed from the washing solution by alkalinisation with CaO. The remediation was most effective for As, reducing its accessibility and mobility significantly. The remediation did not affect the soil's functioning and resulted in increased biomass production in Brassica napus, with reduced accumulation of metals.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Mattias Soerengard, Pablo Gago-Ferrero, Dan B. Kleja, Lutz Ahrens
Summary: The study evaluated the effectiveness of stabilization and solidification (S/S) treatment for soil contaminated with PFAS at a pilot scale, showing high removal rates for long-chain PFASs but lower rates for short-chain PFASs after 6 years of simulated precipitation. The sorption strength of PFASs increased significantly in both reference and S/S-treated soil at pilot scale compared to laboratory-scale tests, with a strong correlation between the two scales. Tentative identification of seven PFASs and their relatively low removal rates from leachate in S/S treatment were also observed in the study.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Erika Jez, Carlo Bravo, Domen Lestan, Simon Gluhar, Ladislau Martin-Neto, Maria De Nobili, Marco Contin
Summary: The study found that CaEDTA remediation significantly decreased the free fraction of humic acids in soils contaminated with potentially toxic metals, while the bound fraction of humic acids and fulvic acids remained unchanged. Disturbance of intermolecular bonds during remediation affected the composition of the free humic acid fraction, confirming a selective removal of non-radical molecules such as carbohydrates while increasing the concentration of free radicals in acidic soil. The restoration of free humic fractions is likely to be a long-term process, indicating that CaEDTA soil washing is moderately conservative in terms of soil organic matter remediation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Christina Leontari, Eleni Kastanaki, Ioannis Moukazis, Evangelos Gidarakos
Summary: This study focused on using thermal desorption to remediate contaminated soil from a refinery, and then utilizing the treated soil for geopolymer formation to produce useful building materials. Results showed that the geopolymer with 50% metakaolin and 50% remediated soil had negligible content of organic pollutants, the toxic metals were immobilized, and the strength increased, providing significant recycling benefits.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Geochemistry & Geophysics
Sonam Taneja, Oznur Karaca, Anil Kumar Haritash
Summary: This study investigated the Electrokinetic Remediation (EKR) technique for removing lead (Pb) from artificially contaminated soils (1000 mg/kg Pb). The effects of operating parameters such as periodic voltage gradient, electrolyte amendments with ethylenediaminetetraacetic acid (EDTA) and a non-ionic surfactant (Tween 80), and type of electrode material were examined. The results showed that a high voltage gradient, EDTA as electrolyte, and stainless-steel electrodes were favorable for the overall Pb removal process.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2023)
Article
Engineering, Environmental
Sha Qiu, Wenqing Cao, Zhiguo Chen, Yiyun Liu, Jingpeng Song, Rong Zhang, He Bai
Summary: The study found that disodium Ethylenediaminetetraacetic acid (EDTA) has the best lead removal ability and increases soil permeability. By optimizing experimental conditions and conducting leaching treatment on soil, the results showed changes in soil pores and specific surface area after leaching.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Jie Li, Qun Zhao, Yihuang Zhao, Hecheng Fu, Xiaoqing Li, Jianhong Huang, Yingjie Li, Xuewei Hu, Senlin Tian
Summary: The study explores the use of self-sustaining smoldering technology for remediating multiple heavy metal-contaminated mine soils. The results show that this method reduces the mobility and bioavailability of heavy metals, improves soil nutrient status, and promotes plant growth.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Green & Sustainable Science & Technology
Choe Earn Choong, Kien Tiek Wong, So Yeon Yoon, Heeyeon Kim, Mincheol Shin, Yoon-Young Chang, Jae-kyu Yang, Sang-Hyoun Kim, Byong-Hun Jeon, Yeomin Yoon, Min Jang
Summary: This study applied a partially water-soluble solvent (EAEW) for remediating complexly contaminated soils by TPH, HMs, and BaP, with optimized conditions and high removal efficiencies demonstrated in laboratory tests and pilot-scale system. The addition of HCl to the EAEW solvent was crucial for highly removing multi-pollutants, and the solvent could be regenerated and reused for multiple cycles. The EAEW solvent, with proven effectiveness, high recovery, and environmental friendly property, showed a high potential for feasible on-site application for multi-polluted soil remediation.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
C. M. Martinez, I. Garrido, P. Flores, P. Hellin, F. Contreras, J. Fenoll
Summary: This study is the first to investigate the removal of different classes of pesticides from soil using ozonation as a remediation technique under field conditions. The results suggest that ozonation has potential as a credible alternative technology for remediating pesticide polluted soils, particularly when dual application is used.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Simon Gluhar, Anela Kaurin, Neza Finzgar, Marko Gerl, Damijana Kastelec, Domen Lestan
Summary: The study demonstrated the successful application of chelator-based soil washing using the new ReSoil (R) technology, effectively removing Pb, Zn, and Cd from the soil and increasing the pH. The bioavailability of toxic metals in the remediated soil significantly decreased, showing the potential for sustainable reuse of the soil with the new technology.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Shuangjin Ma, Zhongren Nan, Yahu Hu, Shuai Chen, Xiaoyan Yang, Jieqiong Su
Summary: Screening and cultivating crop varieties with low Cd accumulation is an effective way to safely utilize slightly contaminated soil. However, the study found that wheat varieties in low-P soil had significantly higher grain Cd concentration than in high-P soil, exceeding safety guidelines. The difference in soil pH, nutrient levels, and Cd speciation between the two soil types influenced the Cd uptake by the plant varieties.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Green & Sustainable Science & Technology
Edward Hingha Foday, Bai Bo, Xiaohui Xu
Summary: Seaweeds have emerged as a preferred sorption material for heavy metal remediation due to their eco-friendliness, affordability, availability, and effective metal ion removal rate. The use of dead seaweed biomass for metal ion sorption offers advantages over other natural sorption materials, showcasing outstanding results in treating contaminated solutions. This article highlights the potential of dead seaweed biomass as a leading remediation material for heavy metal pollution and the effectiveness of its biosorption mechanism.
Article
Public, Environmental & Occupational Health
Ujala Ejaz, Shujaul Mulk Khan, Muhammad Aqeel, Noreen Khalid, Wajiha Sarfraz, Nayab Naeem, Heesup Han, Jongsik Yu, Gong Yue, Antonio Raposo
Summary: Parthenium hysterophorus is a plant species that can uptake heavy metals from the soil and accumulate them in its tissues. The use of the chelating agent EDTA can enhance metal uptake capacity. The experiment showed that the concentrations of Cd and Pb in the shoot of P. hysterophorus were highest without and with the presence of EDTA, respectively. EDTA also increased the accumulation of essential ions in P. hysterophorus.
FRONTIERS IN PUBLIC HEALTH
(2022)
Review
Biotechnology & Applied Microbiology
Xu Zhang, Guoyan Zou, Huaqiang Chu, Zheng Shen, Yalei Zhang, Mohamed H. H. Abbas, Bader Z. Albogami, Li Zhou, Ahmed A. Abdelhafez
Summary: Environmental pollution due to potentially toxic elements (PTEs) is a critical global issue, with concentrations increasing as a result of human activities. PTEs are highly toxic even at low concentrations and cause negative ecological impacts. Recycling agricultural wastes, particularly biochar, is a promising and cost-effective approach for the remediation of polluted soils and water, offering a sustainable solution for a healthy environment.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Xiao Wang, Qing Guo, Xiaoyan Wang, Yong Jia, Wanke Chen, Qianfeng Zhang, Jing Yuan
Summary: In this study, composite repair material was obtained through composting and fermentation of straw biochar and sludge, and its remediation effect on soil heavy metals copper and lead was investigated. The results showed that the addition of remediation materials effectively reduced the content and effectiveness of heavy metals in the soil and promoted the change of Cu and Pb morphology in the heavy metal-contaminated soil, thus achieving the remediation of the heavy metal-contaminated soil.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)