Leaching behaviour of < sup > 226 < /sup > Ra from uranium tailings and adsorption behaviour in geotechnical medias
Environ Pollut. 2024 May 1:124062. doi: 10.1016/j.envpol.2024.124062. Online ahead of print.ABSTRACTThe leaching process of uranium tailings is a typical water-rock interaction. The release of 226Ra from uranium tailings depends on the nuclides outside the intrinsic properties of uranium tailings on the one hand, and is influenced by the water medium on the other. In this paper, a uranium tailings repository in southern China was used as a research object, and uranium tailings at different depths were collected by drilling samples and mixed to analyse the 226Ra occurrence states. Static dissolution leaching experiments of ...
Source: Environmental Pollution - May 3, 2024 Category: Environmental Health Authors: Tian Xie Tuantuan Liu Bing Lian Tianwei Qian Chao Chen Chenglong Xu Pengliang Liang Song Yang Ruiqing Wang Ke Chen Aiming Zhang Jun Zhu Source Type: research
Assessing the Unseen: Copepods as Extensive Microplastic Reservoirs in Global Oceans. A Review and Meta-Analysis Study
This study investigates the role of copepods as widespread microplastic reservoirs in the marine environment, by performing, a systematic review, meta-analysis, and semiquantitative analysis of scientific articles focusing on the interaction between copepods and microplastics under field conditions. Our findings indicate that despite uniformly low ingestion of microplastics across different marine layers and geographical areas, with a slight uptake in neustonic copepods, copepods might constitute one of the largest marine microplastic reservoirs. This phenomenon is attributed more to their vast abundance than to average mi...
Source: Environmental Pollution - May 3, 2024 Category: Environmental Health Authors: V Fagiano M Compa C Alomar S Deudero Source Type: research
Spatial distribution, source identification, and potential risks of 14 bisphenol analogues in soil under different land uses in the megacity of Chengdu, China
This study explored the levels, distribution, potential sources, ecological risks and estrogenic activities of 14 bisphenol analogues (BPs) in soil under eight land-use types in the megacity of Chengdu, China. Eleven BPs were detected in the soil samples and the total concentrations ranged from 32.3-570 ng/g d.w. Levels of bisphenol BP (BPBP) in the soil (up to 208 ng/g d.w.) only second to the most dominant compound bisphenol A (BPA) were found. Relatively higher Σ14BP accumulation in the soil was observed in the commercial and residential areas (median: 136 ng/g d.w. and 131 ng/g d.w.) compared with agricultural area (m...
Source: Environmental Pollution - May 3, 2024 Category: Environmental Health Authors: Mengxi Liao Zhiwei Gan Weiyi Sun Shijun Su Zhi Li Yunqian Zhang Source Type: research
Electron transfer mediated Photo-Fenton-like synergistic catalysis of Fe,Cu-doped MIL-101 coupled with Ag < sub > 3 < /sub > PO < sub > 4 < /sub > : Quantitative evaluation and DFT calculations
In this study, a bimetal-doped composite material Ag3PO4/MIL-101(Fe,Cu) has been designed for the treatment of TC in aqueous solutions. As the molar ratio of Fe/Cu in composite is 1:1, the obtained material AP/MFe1Cu1 is placed in an aqueous environment under visible light irradiation in the presence of 3 mM peroxydisulfate (PDS), which forms a photo-Fenton-like catalytic system that can completely degrade TC (10 mg/L) within 60 min. Further, the degradation rate constant (0.0668 min-1) is 5.66 and 7.34 times higher than that of AP/MFe and AP/MCu, respectively, demonstrating a significant advantage over single metal-doped ...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Xiaojuan Chen Liang Yao Song Xu Juhua He Ning Li Jiaxin Li Bin Liu Yanping Zhu Xin Chen Hailong Wang Runliang Zhu Source Type: research
Effects of micro- and nano-plastics on growth, antioxidant system, DMS, and DMSP production in Emiliania huxleyi
Environ Pollut. 2024 Apr 30:124084. doi: 10.1016/j.envpol.2024.124084. Online ahead of print.ABSTRACTDue to the potential impacts of microplastics (MPs) and nanoplastics (NPs) on algal growth and thereby affect the climate-relevant substances, dimethylsulfoniopropionate (DMSP) and dimethyl sulfide (DMS), we studied the polystyrene (PS) MPs and NPs of 1 μm and 80 nm impacts on the growth, chlorophyll content, reactive oxygen species (ROS), antioxidant enzyme activity, and DMS/DMSP production in Emiliania huxleyi. E. huxleyi is a prominent oceanic alga that plays a key role in DMS and DMSP production. The results revealed t...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Juan Yu Ji-Yuan Tian Yu Jiang Xue-Dan Wang Xin-Ran Song Long-Fei Liu Gui-Peng Yang Source Type: research
Effective immobilization and biosafety assessment of antimony in soil with zeolite-supported nanoscale zero-valent iron
In conclusion, Z-ZVI can be utilized as a promising material for the safe remediation and antimony and other heavy metal-contaminated soils.PMID:38697246 | DOI:10.1016/j.envpol.2024.124082 (Source: Environmental Pollution)
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Ying Zhao Xinyi Zhang Haotian Xue Bin Gong Qingxu Li Wenshan Guo Xiaoguang Meng Source Type: research
Distribution patterns and origins of organophosphate esters in soils from different climate systems on the Tibetan Plateau
This study investigated the distribution characteristics, possible sources, and ecological risks of OPEs in soils from the different climate systems on the TP and its surroundings. The total concentrations of OPEs in soil varied from 468 to 17,451 pg g-1 dry weight, with greater concentrations in southeast Tibet (monsoon zone), followed by Qinghai (transition zone) and, finally, southern Xingjiang (westerly zone). OPE composition profiles also differed among the three areas with tri-n-butyl phosphate dominant in the westerly zone and tris(2-butoxyethyl) phosphate dominant in the Indian monsoon zone. Correlations between di...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Chengcheng Zhu Zhigang Yu Yifan Chen Yiyao Pan Ruiqiang Yang Qinghua Zhang Guibin Jiang Source Type: research
Spatiotemporal dynamic temperature variation dominated by ion behaviors during groundwater remediation using direct current
This study focuses on the spatiotemporal characteristics and mechanism of temperature change in heterogeneous porous media with applied DC. The heating process can be divided into four phases: preferential heating of the low permeability zone (LPZ), rapid heating in the middle region, temperature drop and hot zone shift, and reheating. The dynamic ion behaviors with complex interplays among reactions, electrokinetic-driven migration, and mixed convection induced an uneven redistribution of ions and dominated the heating rate and temperature distribution. The concentration of major ions near the pH jump decreased to 1% of t...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Di Zheng Qianli Xie Fangzhou Li Wan Huang Zhen Qi Jingqi Dong Guanghe Li Fang Zhang Source Type: research
Mechanisms of efficient indoor formaldehyde removal via electro-Fenton: synergy in ·OH generation and utilization through a modified carbon cathode
Environ Pollut. 2024 Apr 30:124090. doi: 10.1016/j.envpol.2024.124090. Online ahead of print.ABSTRACTIndoor formaldehyde poses a significant carcinogenic risk to human health, making its removal imperative. Electro-Fenton degradation has emerged as a promising technology for addressing this concern. In the electro-Fenton system, ·OH is identified as the primary active species responsible for formaldehyde removal. Hence, its generation and utilization are pivotal for the system's effectiveness and economy. Experimental and quantum chemical methods were employed to investigate the effects and mechanisms of nitrogen doping o...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Zhipei Hu Shiwei Lai Yongqi Chen Song Wang Chenghao Wang Xiaochun Wang Wei Zhou Haiqian Zhao Source Type: research
Comparative Microplastic Analysis in Urban Waters Using μ-FTIR And Py-GC-MS: A Case Study in Amsterdam
This study presents the first comparative results on urban water samples using micro Fourier-transform infrared (μ-FTIR) imaging and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) to identify and quantify MPs in both particle numbers and mass concentration. Two sampling campaigns in summer and winter were conducted at 11 locations within the Amsterdam canal network. An advanced in-situ volume-reducing sampling pump was employed to collect MPs from the surface water within the size fraction of 10-300 μm. The analysis revealed MP concentrations within the range of 16 -107 MP/m3, estimated to be 2.0-789 μg/m3 by...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Feride Öykü Sefiloglu Cleo N Stratmann Marthinus Brits Martin J M van Velzen Quinn Groenewoud A Dick Vethaak Rachid Dris Johnny Gasperi Marja Lamoree Source Type: research
CXCL1/IGHG1 signaling enhances crosstalk between tumor cells and tumor-associated macrophages to promote MC-LR-induced colorectal cancer progression
In conclusion, CXCL1 secreted by TAMs can trigger IGHG1 expression in CRC cells, which provides a new clue in elucidating the mechanism of MC-LR-mediated CRC progression.PMID:38697251 | DOI:10.1016/j.envpol.2024.124081 (Source: Environmental Pollution)
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Lingqiao Wang Weiyan Chen Huidong Jin Yao Tan Chengwei Guo Wenjuan Fu Zhiling Wu Ke Cui Yiqi Wang Zhiqun Qiu Guowei Zhang Wenbin Liu Ziyuan Zhou Source Type: research
Activation of peroxymonosulfate by Fe,N co-doped walnut shell biochar for the degradation of sulfamethoxazole: performance and mechanisms
Environ Pollut. 2024 Apr 30:124018. doi: 10.1016/j.envpol.2024.124018. Online ahead of print.ABSTRACTFe and N co-doped walnut shell biochar (Fe,N-BC) was prepared through a one-pot pyrolysis procedure by using walnut shells as feedstocks, melamine as the N source, and iron(III) chloride as the Fe source. Moreover, pristine biochar (BC), nitrogen-doped biochar (N-BC), and α-Fe2O3-BC were synthesized as controls. All the prepared materials were characterized by different techniques and were used for the activation of peroxymonosulfate (PMS) for the degradation of sulfamethoxazole (SMX). A very high degradation rate for SMX ...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Yongtao Xue Mohammadreza Kamali Maria Elisabete V Costa Ian P Thompson Wei Huang Barbara Rossi Lise Appels Raf Dewil Source Type: research
Evaluation of gas emission and enzyme dynamics in sheep manure compost occupying with peach shell biochar
Environ Pollut. 2024 Apr 30:124065. doi: 10.1016/j.envpol.2024.124065. Online ahead of print.ABSTRACTThe effect of peach shell biochar (PSB) amendment on sheep manure (SM) composting was investigated. Five different ratios of PSB were applied (0%, 2.5%, 5%, 7.5%, and 10% PSB), and named T1 to T5, and run 50 days of composting experiment. It was found that PSB (especially 7.5% and 10%) could improve the compost environment, regulate the activity of microorganisms and related enzymes, and promote the decomposition of compost. 7.5% and 10% PSB advanced the heap into the thermophilic stage and increased the maximum temperature...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Hong Liu Mukesh Kumar Awasthi Zengqiang Zhang Asad Syed Ali H Bahkali Source Type: research
Effect of liming on polycyclic aromatic hydrocarbons leaching from hydrocarbon-contaminated tectogenic industriosol
This study also sheds light on the possibility to limit CO2 emissions and resources exploitation to assure the remediation process, thereby enhancing its overall environmental sustainability.PMID:38697254 | DOI:10.1016/j.envpol.2024.124063 (Source: Environmental Pollution)
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Nicolas Martin Thibaut Le Guet Fabrice Dupuy Malgorzata Grybos Emmanuel Joussein Source Type: research
Electron transfer mediated Photo-Fenton-like synergistic catalysis of Fe,Cu-doped MIL-101 coupled with Ag < sub > 3 < /sub > PO < sub > 4 < /sub > : Quantitative evaluation and DFT calculations
In this study, a bimetal-doped composite material Ag3PO4/MIL-101(Fe,Cu) has been designed for the treatment of TC in aqueous solutions. As the molar ratio of Fe/Cu in composite is 1:1, the obtained material AP/MFe1Cu1 is placed in an aqueous environment under visible light irradiation in the presence of 3 mM peroxydisulfate (PDS), which forms a photo-Fenton-like catalytic system that can completely degrade TC (10 mg/L) within 60 min. Further, the degradation rate constant (0.0668 min-1) is 5.66 and 7.34 times higher than that of AP/MFe and AP/MCu, respectively, demonstrating a significant advantage over single metal-doped ...
Source: Environmental Pollution - May 2, 2024 Category: Environmental Health Authors: Xiaojuan Chen Liang Yao Song Xu Juhua He Ning Li Jiaxin Li Bin Liu Yanping Zhu Xin Chen Hailong Wang Runliang Zhu Source Type: research
