Article
Geosciences, Multidisciplinary
Wei Han, Ruifeng Zhao, Wanrong Liu, Yujing Wang, Shuai Zhang, Kang Zhao, Jinglei Nie
Summary: China possesses abundant lead-zinc mineral resources, but mining activities often result in severe heavy metal contamination. This study comprehensively evaluated the contamination levels of eight heavy metals in mine tailings, soil, and groundwater from 27 contaminated sites in China. The levels of contamination were assessed using various indices, and the results showed high concentrations of Zn, Pb, and Cd, posing significant environmental risks. The study also highlighted the correlation between heavy metal content in soil, groundwater, and mine tailings, identifying them as the primary pollution sources and transport pathways. The findings provide valuable insights for assessing the pollution levels in lead-zinc mining regions and guiding the remediation activities for abandoned mining and tailings in China.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Environmental Sciences
Adegboyega Oduniyi Odumade, Fidelis O. Okafor, Chijioke Christopher Ikeagwuani
Summary: This study utilized a combination of lead-zinc mine tailings (LZMT) and Portland limestone cement (PLC) to improve the compaction and microstructural characteristics of tropical black clay soil (TBCS) for use in pavement design and construction. The optimal mixture consisted of 20% LZMT and 4% PLC, which resulted in a slight decrease in strength properties but an increase in permeability. Microstructural analysis showed the formation of a cementitious compound in the modified soil-additive mixture.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Environmental Sciences
Xiaoqing Kan, Yiqie Dong, Lu Feng, Min Zhou, Haobo Hou
Summary: This study analyzed the contamination assessments, geographical distributions, and health risk assessments of eight heavy metals in China's lead-zinc mine tailings. It revealed that most contaminated areas were located in the southern and eastern regions of China, and children were more vulnerable to the adverse effects of heavy metal exposure.
Article
Environmental Sciences
Rongguo Sun, Yue Gao, Yang Yang
Summary: This study investigated the leaching of heavy metals (HMs) from lead-zinc mine tailings and its subsequent effects on paddy soil. The results showed that the concentrations of HMs in the leachate increased with the liquid-to-solid ratio, with Mn and Zn showing the highest increasing rates. When paddy soil was exposed to lead-zinc mine tailings, the HMs accumulated significantly and their contents increased over time. The vertical migration rates of HMs in the paddy soil varied, with Zn and Mn being more easily leached and migrated into deeper layers. The distribution of HMs in different chemical fractions also varied.
Article
Materials Science, Multidisciplinary
Qiusong Chen, Kai Luo, Yunmin Wang, Xiaoshuang Li, Qinli Zhang, Yikai Liu
Summary: This study evaluated the mechanical performance and heavy metal retention of cemented paste backfill (CPB) in managing lead/zinc mine tailings by comparing different binder strategies. The use of bentonite effectively optimized early-age mechanical performance and retained heavy metals within the cementitious matrix. The results suggest that bentonite can be an attractive alternative for in-situ remediation of lead/zinc mine tailings to reduce environmental influence.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Ceramics
Xiaoguang Zhang, Lili Li, Qadeer Ul Hassan, Dean Pan, Gangqiang Zhu
Summary: Using lead slag and lead-zinc tailings to prepare high-value glass-ceramic can achieve the comprehensive utilization of solid waste and reduce environmental pollution. The sintering performance of lead slag is improved by melting and tempering it with lead-zinc tailings and borax. The resulting glass-ceramics exhibit excellent properties and resistance to heavy metal leaching.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Lei Zhao, Guofan Zhang, Mengtao Wang, Siyuan Zhen
Summary: This study introduced a green scheme for producing high-purity vaterite from lead-zinc tailings, finding that the optimal leaching and carbonization ratios of Ca2+ were 74.87% and 96.96% respectively. Under suitable conditions, spherical CaCO3 with high purity and whiteness was prepared, showing potential for broad application prospects in vaterite production.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Metallurgy & Metallurgical Engineering
Wanqing Li, Yubiao Li, Xu Yang, Zhonghong Wang, Wen Chen
Summary: Process mineralogy was used to design the process circuit for magnetite tailings containing copper, lead, and zinc from Marcona Iron Ore Mine. Detailed investigations were carried out on mineralogical parameters such as mineral composition, occurrence, and grain size distribution of the main minerals. The results revealed that the valuable elements were primarily found in magnetite, chalcopyrite, galena, and sphalerite, with significant interlocking relationships observed among the copper-zinc-lead minerals. Consequently, a fine grinding process followed by magnetic separation was necessary for mineral liberation. The application of iso-floatability flotation process to the magnetic tailings resulted in the recovery of copper, zinc, and lead with high grades and recoveries.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2023)
Article
Construction & Building Technology
Xiangling Wang, Xiaolei Wang, Xiaoling Shi
Summary: This study explores the feasibility of using carbonate-activated binders as a substitute for ordinary Portland cement in CPB. The results show that the addition of CLDH and HM can accelerate the reaction of the binder and improve the performance of CPB samples.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Biotechnology & Applied Microbiology
Z. S. Siddiqui, F. Ali, Z. Uddin
Summary: This study investigated the sustainable effect of Sinorhizobium meliloti, a nitrogen-fixing bacterium, on nodulation and photosynthetic traits in four leguminous plant species under low moisture stress conditions. The experiment involved isolating and culturing Sinorhizobium meliloti from fenugreek root nodules, testing its effects on kidney bean, black bean, mung bean, and chickpea plants, and subjecting them to low soil moisture stress while studying nitrogen fixation, nodule formation, and phenomenological fluxes.
LETTERS IN APPLIED MICROBIOLOGY
(2021)
Article
Chemistry, Physical
Juan Maria Terrones-Saeta, Jorge Suarez-Macias, Ana Maria Castanon, Fernando Gomez-Fernandez, Francisco Antonio Corpas-Iglesias
Summary: This research focuses on developing geopolymers using mine tailings from the Linares lead mines, with the aim of creating a sustainable construction material and reducing the environmental impact of traditional products.
Article
Construction & Building Technology
Alieh Saedi, Ahmad Jamshidi-Zanjani, Mehdi Mohseni, Ahmad Khodadadi Darban, Hamidreza Nejati
Summary: Using mechanically activated lead-zinc mine tailings as a replacement for cement in concrete construction is an efficient method to reduce environmental pollution. The research shows that the activated tailings improve the performance of concrete, reduce leaching of harmful substances, and increase compressive strength.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Hongtao Peng, Dong Wang, Massoud Sofi, Priyan Mendis, Zhiyuan Zhou, Junli Liu
Summary: Large volumes of lead-zinc tailings are being produced globally, and their disposal to landfills poses environmental problems. This study demonstrates the effective use of these tailings to produce ceramisite, which can be enhanced by adding clay. Factors such as sintering temperature, sintering time, and LZT content are found to significantly impact the properties of the ceramisite. Testing showed that the leaching content of hazardous components in the ceramisite samples was below the specified limit values, indicating their suitability for civil engineering applications.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Jieping Wang, Yu Jia, Joann K. Whalen, Heather McShane, Brian T. Driscoll, Geoffrey Sunahara
Summary: Nano-sized titanium dioxide has been found to be toxic to nitrogen-fixing bacteria Sinorhizobium meliloti, particularly under UV-A irradiation. Micron-sized titanium dioxide has no effect on the bacteria's viability in the dark, but can photo-kill the cells under UV-A light. Further studies are needed to understand the impact of nano-sized titanium dioxide on the growth of nitrogen-fixing microorganisms in realistic agricultural environments.
CANADIAN JOURNAL OF MICROBIOLOGY
(2022)
Article
Construction & Building Technology
Alieh Saedi, Ahmad Jamshidi-Zanjani, Ahmad Khodadadi Darban, Mehdi Mohseni, Hamidreza Nejati
Summary: Using lead-zinc mine tailings as a cement substitute in concrete production can effectively stabilize heavy metals and improve compressive strength. However, high sulfide content affects the formation of hydration products and reduces the properties and strength of concrete.
JOURNAL OF BUILDING ENGINEERING
(2022)
