Article
Environmental Sciences
Nguyen Van Thinh, Yasuhito Osanai, Tatsuro Adachi, Bui Thi Sinh Vuong, Ippei Kitano, Nguyen Thuy Chung, Phong K. Thai
Summary: The study found that agricultural soil near an old recycling lead smelter in Vietnam is heavily contaminated with heavy metals, especially lead. It proposed an effective treatment for soil remediation involving washing experiments with biodegradable chelators, leading to the identification of potential candidates for removing lead, zinc, and copper.
Article
Biotechnology & Applied Microbiology
Shengbin Ni, Shafiqur Rahman, Shuto Kasai, Shoji Yoshioka, Kuo H. Wong, Asami S. Mashio, Hiroshi Hasegawa
Summary: Lead contamination in shooting range soils poses a threat to ecosystems and human health. Chelator-assisted washing using biodegradable chelators such as EDDS, GLDA, and HIDS has shown promise as a viable treatment option. FeCl3 and CaO can be used as post-treatment to immobilize residual lead. This study provides a practical remediation strategy for extracting lead from soil and reducing leaching potential.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
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
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
Yuchen Wang, Zijian Han, Ang Li, Chongwei Cui
Summary: This study demonstrated the suitability of biodegradable complexing agents for treating soil contaminated with heavy metals using electrokinetic remediation. Sodium alginate (SA) significantly improved the removal efficiency of Cu2+ and Zn2+, while chitosan (CTS) could complex metal ions and form crosslinked CTS gelations, migrating to the catholyte under the electric field.
ENVIRONMENTAL POLLUTION
(2021)
Article
Green & Sustainable Science & Technology
Mahmoud Mazarji, Muhammad Tukur Bayero, Tatiana Minkina, Svetlana Sushkova, Saglara Mandzhieva, Andrey Tereshchenko, Anna Timofeeva, Tatiana Bauer, Marina Burachevskaya, Ridvan Kizilkaya, Coskun Gulser, Chetan Keswani
Summary: The study examined how to utilize biochar for greener remediation of HMs-contaminated soils, including biochar preparation methods and its use as a soil amendment. Biochar-based nanocomposites with functional materials have shown promise due to their unique nanoscale properties, demonstrating potential for reactive and stable applications in polluted soils.
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, Chemical
Weijing He, Xiaojun Hu, Liqi Sun, Bo Wang, Haibo Xing, Kan Li, Hongbo Zhang
Summary: This study investigated the application of a new soil washing agent (IDS) in the removal of potentially toxic metals (Cu, Pb, and Cd) from contaminated soil. The results showed that under optimal conditions, IDS was effective in removing potentially toxic metals from both simulated contaminated soil and real project-scale Pb-polluted soil.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(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
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)
Article
Environmental Sciences
Ivan Diarra, Krishna Kumar Kotra, Surendra Prasad
Summary: The application of biodegradable chelating agents EDDS and CA negatively impacted plant growth by leading to chlorotic lesions on leaves and decreasing shoot length, while GLDA showed positive effects by significantly increasing plant growth. Despite the use of chelating agents, heavy metals were mainly accumulated in roots, limiting the effectiveness of phytoextraction with Brassica spp. in multi-metal settings.
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.
