Pub Date : 2024-09-05DOI: 10.1007/s11356-024-34910-6
Shirwan Malaie, Latifeh Pourakbar, Sina Siavash Moghaddam, Jianbo Xiao, Nabi Khezrnejad
Mercury is one of the most toxic pollutants that has drawn the attention of scientists. This study investigates the phytoremediation capabilities of Vigna radiata L. in conjunction with microbial biostimulators. The inoculated seeds were cultivated in soil under controlled greenhouse conditions. The concentration of Hg, biomass, and photosynthetic pigments was investigated under amendment factor including EDTA, bacterial, fungal (Mycorrhiza and Trichoderma), biochar, and combined levels, as well as the pollution factor with three levels of HgCl2 as two factorial experiments. Results showed that Plant Growth-Promoting Microorganisms (PGPMs) influenced mercury absorption and distribution in different plant organs. Aside from biochar, all stimulators increased the plant's Hg concentration. Although EDTA greatly increased mercury accumulation in plants, it reduced biomass. Fungal and bacterial treatments increased total mercury in the plant but decreased its concentration in the leaves. The combination of bacteria and fungi resulted in the highest mercury absorption, while the biochar in combination with PGPMs produced the greatest biomass. Analysis of mercury concentration in seeds indicated that V radiata effectively prevented its contamination in seeds. The results disclosed that microbial combinations of bacteria and fungi could increase the plant's potential to cope with heavy metal pollution. This improvement is due to the different roles of these two organisms, like nitrogen fixation by bacteria and phosphorus absorption by mycorrhiza fungi. Moreover, biochar as a soil amendment and microorganism carrier was noticed. Finally, considering the plant's inherent capacity to stabilize mercury in the roots, phytostabilization with the benefit of combined levels of biochar and microorganisms can be introduced as the best approach.
{"title":"Phytoremediation of mercury-contaminated Soil by Vigna radiata L. plant in companion with bacterial and fungal biofertilizers.","authors":"Shirwan Malaie, Latifeh Pourakbar, Sina Siavash Moghaddam, Jianbo Xiao, Nabi Khezrnejad","doi":"10.1007/s11356-024-34910-6","DOIUrl":"https://doi.org/10.1007/s11356-024-34910-6","url":null,"abstract":"<p><p>Mercury is one of the most toxic pollutants that has drawn the attention of scientists. This study investigates the phytoremediation capabilities of Vigna radiata L. in conjunction with microbial biostimulators. The inoculated seeds were cultivated in soil under controlled greenhouse conditions. The concentration of Hg, biomass, and photosynthetic pigments was investigated under amendment factor including EDTA, bacterial, fungal (Mycorrhiza and Trichoderma), biochar, and combined levels, as well as the pollution factor with three levels of HgCl<sub>2</sub> as two factorial experiments. Results showed that Plant Growth-Promoting Microorganisms (PGPMs) influenced mercury absorption and distribution in different plant organs. Aside from biochar, all stimulators increased the plant's Hg concentration. Although EDTA greatly increased mercury accumulation in plants, it reduced biomass. Fungal and bacterial treatments increased total mercury in the plant but decreased its concentration in the leaves. The combination of bacteria and fungi resulted in the highest mercury absorption, while the biochar in combination with PGPMs produced the greatest biomass. Analysis of mercury concentration in seeds indicated that V radiata effectively prevented its contamination in seeds. The results disclosed that microbial combinations of bacteria and fungi could increase the plant's potential to cope with heavy metal pollution. This improvement is due to the different roles of these two organisms, like nitrogen fixation by bacteria and phosphorus absorption by mycorrhiza fungi. Moreover, biochar as a soil amendment and microorganism carrier was noticed. Finally, considering the plant's inherent capacity to stabilize mercury in the roots, phytostabilization with the benefit of combined levels of biochar and microorganisms can be introduced as the best approach.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142131532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-05DOI: 10.1007/s11356-024-34796-4
Giuseppe Sabatino, Giuseppe De Rosa, Michela D'Alessandro, Cinzia De Vittor, Valentina Esposito, Marco Graziano, Alessandro Tripodo, Valentina Volpi, Marcella Di Bella
The archipelago of the Aeolian Islands in the Tyrrhenian Sea is a globally important natural laboratory. The archipelago, declared a UNESCO World Heritage Site for its unique geology and biodiversity, offers a unique opportunity to study plastic pollution. This study presents an initiative to assess the occurrence of plastic pellets on the beaches of five Aeolian Islands. It provides an insight into the polymer composition and the effects of degradation. Collected pellets were analyzed using stereomicroscopy and Fourier transform infrared spectroscopy (FTIR). Hierarchical cluster analysis (HCA) based on the results of the FTIR data has proved to be an effective statistical method in identifying different clusters corresponding to different degradation phases of the collected pellets. The infrared analysis identified polyethylene (80%) as the main polymer, with a small amount of polypropylene (20%). It was found that the surfaces of some pellets undergo changes during weathering that alter the polymer surfaces. By combining data on plastic pellets from the Aeolian Islands and surrounding coastal areas, we are gaining a more comprehensive understanding of the distribution patterns of microplastics. The results of the monitoring and characterization are expected to support the developing of waste management and remediation strategies for this environmentally sensitive region.
{"title":"Plastic pellet pollution in the Aeolian Islands UNESCO site (Italy, Western Mediterranean Sea): results of a comprehensive characterization and monitoring study.","authors":"Giuseppe Sabatino, Giuseppe De Rosa, Michela D'Alessandro, Cinzia De Vittor, Valentina Esposito, Marco Graziano, Alessandro Tripodo, Valentina Volpi, Marcella Di Bella","doi":"10.1007/s11356-024-34796-4","DOIUrl":"https://doi.org/10.1007/s11356-024-34796-4","url":null,"abstract":"<p><p>The archipelago of the Aeolian Islands in the Tyrrhenian Sea is a globally important natural laboratory. The archipelago, declared a UNESCO World Heritage Site for its unique geology and biodiversity, offers a unique opportunity to study plastic pollution. This study presents an initiative to assess the occurrence of plastic pellets on the beaches of five Aeolian Islands. It provides an insight into the polymer composition and the effects of degradation. Collected pellets were analyzed using stereomicroscopy and Fourier transform infrared spectroscopy (FTIR). Hierarchical cluster analysis (HCA) based on the results of the FTIR data has proved to be an effective statistical method in identifying different clusters corresponding to different degradation phases of the collected pellets. The infrared analysis identified polyethylene (80%) as the main polymer, with a small amount of polypropylene (20%). It was found that the surfaces of some pellets undergo changes during weathering that alter the polymer surfaces. By combining data on plastic pellets from the Aeolian Islands and surrounding coastal areas, we are gaining a more comprehensive understanding of the distribution patterns of microplastics. The results of the monitoring and characterization are expected to support the developing of waste management and remediation strategies for this environmentally sensitive region.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142131543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-05DOI: 10.1007/s11356-024-34872-9
Venkatramana Losetty, Sandhanasamy Devanesan, Mohamad S AlSalhi, Prabu Panneer Velu, Dhanalakshmi Muthupillai, Kerena Amar Kumar, Sivarama Krishna Lakkaboyana
The current investigation focused on the green synthesis of silver nanoparticles (Ag NPs) using Malachra alceifolia (Ma) (the common name is wild okra) leaf extract. The morphological, structural, and optical properties of the synthesized Ma-Ag NPs were characterized by various techniques. The absorption spectral studies (UV-vis and FTIR) confirm the formation of Ma-Ag NPs and their band gap was calculated as 2.1 eV with the help of Tauc's equation. The XRD study gives information about the crystalline nature and FCC structure. The SEM analysis estimates the particle size as 10-55 nm and the average size as 28 nm with a spherical shape. Furthermore, biological studies such as antibacterial activity was performed by the broth dilution method whereas antioxidant was studied through the DPPH radical scavenging technique. To compare the antibacterial activity between Gram-positive and Gram-negative pathogens, the highest bacterial growth of inhibition was observed for Pseudomonas aeruginosa than Staphylococcus aureus when increasing the concentration of the plant extract and Ma-Ag NPs. The scavenging activity of DPPH for both leaf extract and synthesized Ma-Ag NPs was represented in a dose-dependent manner (0.1-1.0 mg/mL), Ma-Ag NPs have shown a significant scavenging activity ranging from 39 to 54% with an average IC50 value of 0.87 ± 0.08. Furthermore, a molecular docking study was performed to confirm the binding interaction outline between the bioactive molecule methyl commate A, Ma-Ag NPs, and proteins such as Aminotransferase and Tyrosyl-tRNA synthetase active sites. The highest interaction tendency was observed between the Aminotransferase and methyl commate A with a binding energy of - 7.79 kcal/mol-1. The high electronegative oxygen of the ligand interacts with H-N- of Lys98 (-O--H-N-) through the formation of hydrogen bond by 3.53A° distance. In addition, the photocatalytic efficiency of Ma-Ag NPs was studied with methylene blue dye degradation under sunlight irradiation at different time intervals. The attained photocatalytic degradation efficiency was 98.3% after 120 min.
{"title":"Green synthesis of silver nanoparticles using Malachra alceifolia (wild okra) for wastewater treatment and biomedical applications with molecular docking approach.","authors":"Venkatramana Losetty, Sandhanasamy Devanesan, Mohamad S AlSalhi, Prabu Panneer Velu, Dhanalakshmi Muthupillai, Kerena Amar Kumar, Sivarama Krishna Lakkaboyana","doi":"10.1007/s11356-024-34872-9","DOIUrl":"https://doi.org/10.1007/s11356-024-34872-9","url":null,"abstract":"<p><p>The current investigation focused on the green synthesis of silver nanoparticles (Ag NPs) using Malachra alceifolia (Ma) (the common name is wild okra) leaf extract. The morphological, structural, and optical properties of the synthesized Ma-Ag NPs were characterized by various techniques. The absorption spectral studies (UV-vis and FTIR) confirm the formation of Ma-Ag NPs and their band gap was calculated as 2.1 eV with the help of Tauc's equation. The XRD study gives information about the crystalline nature and FCC structure. The SEM analysis estimates the particle size as 10-55 nm and the average size as 28 nm with a spherical shape. Furthermore, biological studies such as antibacterial activity was performed by the broth dilution method whereas antioxidant was studied through the DPPH radical scavenging technique. To compare the antibacterial activity between Gram-positive and Gram-negative pathogens, the highest bacterial growth of inhibition was observed for Pseudomonas aeruginosa than Staphylococcus aureus when increasing the concentration of the plant extract and Ma-Ag NPs. The scavenging activity of DPPH for both leaf extract and synthesized Ma-Ag NPs was represented in a dose-dependent manner (0.1-1.0 mg/mL), Ma-Ag NPs have shown a significant scavenging activity ranging from 39 to 54% with an average IC<sub>50</sub> value of 0.87 ± 0.08. Furthermore, a molecular docking study was performed to confirm the binding interaction outline between the bioactive molecule methyl commate A, Ma-Ag NPs, and proteins such as Aminotransferase and Tyrosyl-tRNA synthetase active sites. The highest interaction tendency was observed between the Aminotransferase and methyl commate A with a binding energy of - 7.79 kcal/mol<sup>-1</sup>. The high electronegative oxygen of the ligand interacts with H-N- of Lys98 (-O--H-N-) through the formation of hydrogen bond by 3.53A° distance. In addition, the photocatalytic efficiency of Ma-Ag NPs was studied with methylene blue dye degradation under sunlight irradiation at different time intervals. The attained photocatalytic degradation efficiency was 98.3% after 120 min.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142131528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Plant fatty acids (FAs) are critical components of lipids and play an important role in coping with pollution-induced stress. However, the relationship between the fluctuating changes of FAs and the toxic effects of pollutants is not clear. Here, we analyzed and identified 19 FAs, namely 14 medium and long chain fatty acids (MLCFAs) and 5 very long chain fatty acids (VLCFAs). First, a positive correlation between plant biomass and LCFA content was observed. Changes in unsaturation were inversely related to cell membrane permeability, which serves as an indicator of the toxic effects. In particular, the use of herbicides led to a reduction in total FA content, but caused a significant increase in free fatty acids (FFAs), which facilitate oxidative stress. In addition, supplementation with exogenous FAs, particularly linoleic and alpha-linolenic acids, effectively alleviated the toxic inhibition. (R)-dichlorprop causes abnormal FA metabolism that can be reversed by ferrostatin-1, a ferroptosis inhibitor. Under (R)-dichlorprop exposure, the balance of FA unsaturation in plants is disrupted by inhibition of FA desaturase activity, ultimately leading to ferroptosis and disruption of cell membrane integrity. This study aims to enhance the understanding of the ecotoxic effects of herbicides by examining changes in FAs. The findings will provide a scientific basis for controlling environmental risks associated with hazardous substances.
植物脂肪酸(FAs)是脂类的重要组成部分,在应对污染引起的压力方面发挥着重要作用。然而,脂肪酸的波动变化与污染物毒性效应之间的关系尚不清楚。在此,我们分析并鉴定了19种FAs,即14种中长链脂肪酸(MLCFAs)和5种超长链脂肪酸(VLCFAs)。首先,我们观察到植物生物量与 LCFA 含量之间存在正相关。不饱和度的变化与细胞膜渗透性成反比,而细胞膜渗透性是毒性效应的一个指标。特别是,使用除草剂导致总脂肪酸含量减少,但游离脂肪酸(FFAs)却显著增加,而游离脂肪酸会促进氧化应激。此外,补充外源性脂肪酸,尤其是亚油酸和α-亚麻酸,可有效缓解毒性抑制作用。(R)-二氯丙烷会导致脂肪酸代谢异常,而铁蛋白抑制剂铁前列素-1可逆转这种异常。在接触(R)-二氯丙醇的情况下,植物体内FA不饱和的平衡会因FA去饱和酶活性受到抑制而被打破,最终导致铁突变和细胞膜完整性的破坏。本研究旨在通过检测 FA 的变化,加深对除草剂生态毒性影响的了解。研究结果将为控制与有害物质相关的环境风险提供科学依据。
{"title":"Dynamic changes of fatty acids and (R)-dichlorprop toxicity in Arabidopsis thaliana: correlation, mechanism, and implications.","authors":"Jun Li, Qiushui Zhang, Hui Chen, Dongmei Xu, Zunwei Chen, Yuezhong Wen","doi":"10.1007/s11356-024-34888-1","DOIUrl":"https://doi.org/10.1007/s11356-024-34888-1","url":null,"abstract":"<p><p>Plant fatty acids (FAs) are critical components of lipids and play an important role in coping with pollution-induced stress. However, the relationship between the fluctuating changes of FAs and the toxic effects of pollutants is not clear. Here, we analyzed and identified 19 FAs, namely 14 medium and long chain fatty acids (MLCFAs) and 5 very long chain fatty acids (VLCFAs). First, a positive correlation between plant biomass and LCFA content was observed. Changes in unsaturation were inversely related to cell membrane permeability, which serves as an indicator of the toxic effects. In particular, the use of herbicides led to a reduction in total FA content, but caused a significant increase in free fatty acids (FFAs), which facilitate oxidative stress. In addition, supplementation with exogenous FAs, particularly linoleic and alpha-linolenic acids, effectively alleviated the toxic inhibition. (R)-dichlorprop causes abnormal FA metabolism that can be reversed by ferrostatin-1, a ferroptosis inhibitor. Under (R)-dichlorprop exposure, the balance of FA unsaturation in plants is disrupted by inhibition of FA desaturase activity, ultimately leading to ferroptosis and disruption of cell membrane integrity. This study aims to enhance the understanding of the ecotoxic effects of herbicides by examining changes in FAs. The findings will provide a scientific basis for controlling environmental risks associated with hazardous substances.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142131526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The global transition towards clean and sustainable energy sources has led to an increasing interest in green hydrogen production. The present work focuses on the development and assessment of a solar-assisted green hydrogen production system. The basic objective of this work is to investigate the influence of solar radiation to drive the electrolysis process for green hydrogen production. The system design includes photovoltaic solar panel to capture solar radiation and convert it into electrical energy. This energy is further utilized to operate an electrolyzer with zinc electrodes that facilitates the water-splitting reaction resulting in the production of hydrogen gas. The solar panel outputs along with global radiation and other relevant climatic conditions are monitored. The hydrogen production is analyzed at three different voltages, i.e., 11 V, 12 V, and 13 V. After 60 min of operations, the maximum amount of hydrogen (2952 mL) is produced at 13 V. The fabricated electrolyzer has been found suitable and economically feasible.
随着全球向清洁和可持续能源的过渡,人们对绿色制氢的兴趣与日俱增。本研究的重点是开发和评估太阳能辅助绿色制氢系统。这项工作的基本目标是研究太阳辐射对驱动绿色制氢电解过程的影响。系统设计包括光伏太阳能电池板,用于捕获太阳辐射并将其转化为电能。电能被进一步用于操作装有锌电极的电解槽,促进水分离反应,从而产生氢气。太阳能电池板的输出以及全球辐射和其他相关气候条件都受到监控。经过 60 分钟的运行,在 13 V 电压下产生的氢气量最大(2952 mL)。
{"title":"Solar water splitting for hydrogen production using Zn electrodes: a green and sustainable approach.","authors":"Dhananjay Singh, Indresh Singh, Raj Kumar Arya, Vinay Mishra, Deepak Singh, Siraj Alam, Balendu Shekher Giri","doi":"10.1007/s11356-024-34914-2","DOIUrl":"https://doi.org/10.1007/s11356-024-34914-2","url":null,"abstract":"<p><p>The global transition towards clean and sustainable energy sources has led to an increasing interest in green hydrogen production. The present work focuses on the development and assessment of a solar-assisted green hydrogen production system. The basic objective of this work is to investigate the influence of solar radiation to drive the electrolysis process for green hydrogen production. The system design includes photovoltaic solar panel to capture solar radiation and convert it into electrical energy. This energy is further utilized to operate an electrolyzer with zinc electrodes that facilitates the water-splitting reaction resulting in the production of hydrogen gas. The solar panel outputs along with global radiation and other relevant climatic conditions are monitored. The hydrogen production is analyzed at three different voltages, i.e., 11 V, 12 V, and 13 V. After 60 min of operations, the maximum amount of hydrogen (2952 mL) is produced at 13 V. The fabricated electrolyzer has been found suitable and economically feasible.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142131544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-05DOI: 10.1007/s11356-024-34679-8
Karine Sylvain, Thomas Pabst, Isabelle Demers
Stockpiles containing sulfide minerals are subject to oxidation reactions when exposed to atmospheric conditions, which can result in the formation of acid mine drainage (AMD). Reactive waste rock has limited re-use potential due to the contamination risk associated with the generated drainage water. The re-use of reactive waste rock could lead to a significant reduction in the volume of waste rock as it mitigates the environmental impact of mine waste deposition. Acid mine drainage generation rate depends on sulfide weathering kinetics which are controlled by many parameters such as the mineralogy and the particle size. Fine fractions of waste rock have higher specific surface areas and degree of liberation of sulfides, resulting in greater reactivity than the coarse fractions. The objective of this research was therefore to evaluate the potential of re-use by controlling particle size using the sieving method. Two different potentially acid-generating waste rocks were divided into six fractions and subjected to both static and kinetic tests. Prediction of the geochemical behavior using static test did not consider the liberation of the minerals, and the long-term prediction was therefore overestimated. Results of the kinetic columns showed there was less oxidation of the sulfide minerals in the coarse fractions than in the fine fractions. Additionally, the distribution of sulfidic minerals and neutralizing minerals with particle size is influencing the potential of the re-use of the reactive waste rock.
{"title":"Improving the re-use potential of reactive waste rock using sieving: a laboratory geochemical study.","authors":"Karine Sylvain, Thomas Pabst, Isabelle Demers","doi":"10.1007/s11356-024-34679-8","DOIUrl":"https://doi.org/10.1007/s11356-024-34679-8","url":null,"abstract":"<p><p>Stockpiles containing sulfide minerals are subject to oxidation reactions when exposed to atmospheric conditions, which can result in the formation of acid mine drainage (AMD). Reactive waste rock has limited re-use potential due to the contamination risk associated with the generated drainage water. The re-use of reactive waste rock could lead to a significant reduction in the volume of waste rock as it mitigates the environmental impact of mine waste deposition. Acid mine drainage generation rate depends on sulfide weathering kinetics which are controlled by many parameters such as the mineralogy and the particle size. Fine fractions of waste rock have higher specific surface areas and degree of liberation of sulfides, resulting in greater reactivity than the coarse fractions. The objective of this research was therefore to evaluate the potential of re-use by controlling particle size using the sieving method. Two different potentially acid-generating waste rocks were divided into six fractions and subjected to both static and kinetic tests. Prediction of the geochemical behavior using static test did not consider the liberation of the minerals, and the long-term prediction was therefore overestimated. Results of the kinetic columns showed there was less oxidation of the sulfide minerals in the coarse fractions than in the fine fractions. Additionally, the distribution of sulfidic minerals and neutralizing minerals with particle size is influencing the potential of the re-use of the reactive waste rock.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142131530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-05DOI: 10.1007/s11356-024-34876-5
Puhong Yi, Qinping Li, Xueli Zhou, Ruiqi Liang, Xiaoyan Ding, Ming Wu, Kun Wang, Ji Li, Weixia Wang, Guangxin Lu, Tingheng Zhu
In aerobic composting of food waste, acidification of the material (acidified food waste, AFW) often occurs and consequently leads to failure of fermentation initiation. In this study, we solved this problem by adding Saccharomyces cerevisiae inoculants. The results showed that the inoculation with S. cerevisiae effectively promoted the composting process. In 2 kg composting, inoculation with S. cerevisiae significantly elevated the pile temperatures by 4 ~ 14 °C, accompanied by a rapid increase in pH from 4.5 to 6.0. In 15 kg composting, total acid decreased faster and the thermophilic stage above 50 °C was prolonged by 3 days longer than in the control. The residual oxygen content in the reactor indicated that S. cerevisiae, which proliferated during composting, increased microbial activity and reduced ammonia emission during the thermophilic phase. Cell density analysis showed that compost inoculated with S. cerevisiae promoted thermophilic bacterial propagation. Metagenomic analysis showed that the dominant bacteria in the AFW compost were Firmicutes, Proteobacteria, Bacteroidetes, and Actinobacteria, and the relative abundance of Bacillus, Thermobacillus, and Thermobifida increased when inoculated with S. cerevisiae. These results indicate that the inoculation of S. cerevisiae is an effective strategy to improve the aerobic composting process of AFW by accelerating the initial phase and altering microbial community structure in the thermophilic phase. Our findings suggest that S. cerevisiae can be applied to aerobic composting of organic wastes to effectively address the problem of acidification.
{"title":"Inoculation of Saccharomyces cerevisiae for facilitating aerobic composting of acidified food waste.","authors":"Puhong Yi, Qinping Li, Xueli Zhou, Ruiqi Liang, Xiaoyan Ding, Ming Wu, Kun Wang, Ji Li, Weixia Wang, Guangxin Lu, Tingheng Zhu","doi":"10.1007/s11356-024-34876-5","DOIUrl":"https://doi.org/10.1007/s11356-024-34876-5","url":null,"abstract":"<p><p>In aerobic composting of food waste, acidification of the material (acidified food waste, AFW) often occurs and consequently leads to failure of fermentation initiation. In this study, we solved this problem by adding Saccharomyces cerevisiae inoculants. The results showed that the inoculation with S. cerevisiae effectively promoted the composting process. In 2 kg composting, inoculation with S. cerevisiae significantly elevated the pile temperatures by 4 ~ 14 °C, accompanied by a rapid increase in pH from 4.5 to 6.0. In 15 kg composting, total acid decreased faster and the thermophilic stage above 50 °C was prolonged by 3 days longer than in the control. The residual oxygen content in the reactor indicated that S. cerevisiae, which proliferated during composting, increased microbial activity and reduced ammonia emission during the thermophilic phase. Cell density analysis showed that compost inoculated with S. cerevisiae promoted thermophilic bacterial propagation. Metagenomic analysis showed that the dominant bacteria in the AFW compost were Firmicutes, Proteobacteria, Bacteroidetes, and Actinobacteria, and the relative abundance of Bacillus, Thermobacillus, and Thermobifida increased when inoculated with S. cerevisiae. These results indicate that the inoculation of S. cerevisiae is an effective strategy to improve the aerobic composting process of AFW by accelerating the initial phase and altering microbial community structure in the thermophilic phase. Our findings suggest that S. cerevisiae can be applied to aerobic composting of organic wastes to effectively address the problem of acidification.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142131531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In recent years, heavy rainfall disasters linked to climate change have become more frequent, raising concerns about the release of chemicals stored in factories. Assessing chemical contamination during such emergencies therefore necessitates the development of a quick and easy method for evaluating hazardous contaminants in combination with toxicity testing. This study proposes a "toxicity screening" method that combines biological response testing and chemical analysis to systematically evaluate hazardous contaminants in emergency situations. The toxicity screening method evaluates the water quality in three steps, including water quality measurements and a delayed fluorescence (DF) assay, metal content measurements and a DF assay, and targeted screening analysis and a DF assay. The efficacy of this method was tested using industrial wastewater from 14 locations. Seven of the samples were non-toxic, while the other seven samples were toxic, displaying no observed effect concentration (NOEC) values ranging from 0.625 to 20%. Two toxic samples in the first phase possessed high total chlorine concentrations (0.4 mg L-1) and conductivities (2200 mS m-1), indicating that the main sources of toxicity were residual chlorine and a high salt concentration. In the second phase, metal content analysis identified metals as the toxicity cause in four samples. In the third phase, the organic contaminants were analyzed, and tri-n-octyl phosphate (TNOP) was detected at a concentration of 0.00027 mg L-1. The results of solid-phase extraction experiments and exposure tests with TNOP alone indicated that the contribution of TNOP to the toxicity was negligible and that chemicals not adsorbed on the solid-phase extraction cartridges were the cause of toxicity. The proposed method can therefore be considered effective for disaster-related water quality assessment, delivering results within 12 days.
{"title":"Systematization of a toxicity screening method based on a combination of chemical analysis and the delayed fluorescence algal growth inhibition test for use in emergency environmental surveys.","authors":"Toyokazu Koga, Shusaku Hirakawa, Shuhei Nakagawa, Yuko Ishibashi, Manabu Kashiwabara, Takashi Miyawaki","doi":"10.1007/s11356-024-34821-6","DOIUrl":"https://doi.org/10.1007/s11356-024-34821-6","url":null,"abstract":"<p><p>In recent years, heavy rainfall disasters linked to climate change have become more frequent, raising concerns about the release of chemicals stored in factories. Assessing chemical contamination during such emergencies therefore necessitates the development of a quick and easy method for evaluating hazardous contaminants in combination with toxicity testing. This study proposes a \"toxicity screening\" method that combines biological response testing and chemical analysis to systematically evaluate hazardous contaminants in emergency situations. The toxicity screening method evaluates the water quality in three steps, including water quality measurements and a delayed fluorescence (DF) assay, metal content measurements and a DF assay, and targeted screening analysis and a DF assay. The efficacy of this method was tested using industrial wastewater from 14 locations. Seven of the samples were non-toxic, while the other seven samples were toxic, displaying no observed effect concentration (NOEC) values ranging from 0.625 to 20%. Two toxic samples in the first phase possessed high total chlorine concentrations (0.4 mg L<sup>-1</sup>) and conductivities (2200 mS m<sup>-1</sup>), indicating that the main sources of toxicity were residual chlorine and a high salt concentration. In the second phase, metal content analysis identified metals as the toxicity cause in four samples. In the third phase, the organic contaminants were analyzed, and tri-n-octyl phosphate (TNOP) was detected at a concentration of 0.00027 mg L<sup>-1</sup>. The results of solid-phase extraction experiments and exposure tests with TNOP alone indicated that the contribution of TNOP to the toxicity was negligible and that chemicals not adsorbed on the solid-phase extraction cartridges were the cause of toxicity. The proposed method can therefore be considered effective for disaster-related water quality assessment, delivering results within 12 days.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142124480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-04DOI: 10.1007/s11356-024-34644-5
Baizhou Lu, Zhanqiang Fang, Pokeung Eric Tsang
Phyllanthus emblica L. fruit extract (PFE) was introduced to improve ZVI/H2O2 technology, and the efficiency and mechanism of PFE promoting ZVI/H2O2 technology were explored. With the introduction of PFE, the Norfloxacin (NOR) removal rate and kobs of the process were improved by 41.17% and 5.08 times, respectively. In the ZVI/H2O2/PFE process, the degradation of NOR by the attack of ROS is the main pathway for decontamination and is dominated by the heterogeneous reaction on the catalyst surface. PFE contains 13.92 g/L titratable acid and has good complexing ability and antioxidant ability. The mechanism of PFE promoting ZVI/H2O2 technology was based on lowering the pH, complemented by chelation and antioxidant capacity. With the introduction of PFE, the utilization rate of the reagent was significantly increased (7.56 times for ZVI and 3.21 times for H2O2), the applicable pH range was widened (6-9) and the iron sludge was reduced (32.80%). Meanwhile, the concept of UPR is proposed for the first time. The result is the key role to the selection of green promoters in the ZVI/H2O2 process depends on the abundance of titratable acid, followed by a certain chelating ability and antioxidant capacity.
{"title":"Key role of Phyllanthus emblica L. fruit extract promotes ZVI/H<sub>2</sub>O<sub>2</sub> process: rich titratable acid, suitable chelating ability, and antioxidant capacity.","authors":"Baizhou Lu, Zhanqiang Fang, Pokeung Eric Tsang","doi":"10.1007/s11356-024-34644-5","DOIUrl":"https://doi.org/10.1007/s11356-024-34644-5","url":null,"abstract":"<p><p>Phyllanthus emblica L. fruit extract (PFE) was introduced to improve ZVI/H<sub>2</sub>O<sub>2</sub> technology, and the efficiency and mechanism of PFE promoting ZVI/H<sub>2</sub>O<sub>2</sub> technology were explored. With the introduction of PFE, the Norfloxacin (NOR) removal rate and k<sub>obs</sub> of the process were improved by 41.17% and 5.08 times, respectively. In the ZVI/H<sub>2</sub>O<sub>2</sub>/PFE process, the degradation of NOR by the attack of ROS is the main pathway for decontamination and is dominated by the heterogeneous reaction on the catalyst surface. PFE contains 13.92 g/L titratable acid and has good complexing ability and antioxidant ability. The mechanism of PFE promoting ZVI/H<sub>2</sub>O<sub>2</sub> technology was based on lowering the pH, complemented by chelation and antioxidant capacity. With the introduction of PFE, the utilization rate of the reagent was significantly increased (7.56 times for ZVI and 3.21 times for H<sub>2</sub>O<sub>2</sub>), the applicable pH range was widened (6-9) and the iron sludge was reduced (32.80%). Meanwhile, the concept of UPR is proposed for the first time. The result is the key role to the selection of green promoters in the ZVI/H<sub>2</sub>O<sub>2</sub> process depends on the abundance of titratable acid, followed by a certain chelating ability and antioxidant capacity.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142124476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-04DOI: 10.1007/s11356-024-34855-w
Phuc Hung Nguyen, Thai Nguyen Le, Minh Tam Pham, Minh Quy Trinh
The circular economy has been identified as a critical keyword for achieving the Sustainable Development Goals. Nevertheless, there is a lack of in-depth empirical literature on the impact mechanisms of the circular economy (CE) and economic growth (GDP) in mitigating e-waste generation (waste electrical and electronic equipment - WEEE). Given Europe's leading position in e-waste generation per capita, the study aims to scrutinize the interplay between CE, GDP, and WEEE for 2010-2020. The research applies advanced econometric methods, primarily centered around the system generalized method of moment and dynamic panel threshold. It was noteworthy that different CE indicators exhibited varying effects on WEEE through the econometric analysis. Therefore, the research uniquely utilized the entropy weight method to compute a holistic composite index for the circular economy (CEI) and gained some interesting findings. Firstly, CEI significantly reduced WEEE, while GDP drove its increase. However, an overly developed CEI of 0.7616 counteracted its beneficial effect. Secondly, the synergy of CEI*GDP engendered the circular economy rebound effect, diminishing environmental benefits. Thirdly, in the circular context, the environmental Kuznets curve was validated, showcasing an inverted U-shaped pattern. Finally, the study found CEI to have different threshold effects, with thresholds of 0.2161 to inhibit WEEE, 0.2114 to avert the circular economy rebound effect, and 0.2360 to leverage GDP in reducing WEEE. These outcomes give insights to policymakers in designing sound policies targeting circular economy development and decoupling e-waste generation from economic growth towards the United Nations' SDGs.
循环经济已被确定为实现可持续发展目标的关键关键词。然而,关于循环经济(CE)和经济增长(GDP)在减少电子废物(废弃电气和电子设备--WEEE)产生方面的影响机制,还缺乏深入的实证文献。鉴于欧洲在人均电子废物产生量方面的领先地位,本研究旨在探讨 2010-2020 年经济增长、国内生产总值和 WEEE 之间的相互作用。研究采用了先进的计量经济学方法,主要以系统广义矩法和动态面板阈值为核心。值得注意的是,通过计量分析,不同的消费支出指标对 WEEE 的影响各不相同。因此,研究独特地利用熵权法计算了循环经济的整体综合指数(CEI),并获得了一些有趣的发现。首先,CEI 大幅减少了废弃电子电气设备,而 GDP 则推动了废弃电子电气设备的增加。然而,过于发达的 CEI(0.7616)抵消了其有利影响。其次,CEI*GDP 的协同作用产生了循环经济反弹效应,削弱了环境效益。第三,在循环背景下,环境库兹涅茨曲线得到验证,呈现出倒 U 型模式。最后,研究发现 CEI 具有不同的阈值效应,抑制 WEEE 的阈值为 0.2161,避免循环经济反弹效应的阈值为 0.2114,利用 GDP 减少 WEEE 的阈值为 0.2360。这些结果为政策制定者设计合理的政策提供了启示,这些政策旨在发展循环经济,使电子废物的产生与经济增长脱钩,从而实现联合国的可持续发展目标。
{"title":"Circular economy, economic growth, and e-waste generation in EU27 countries: Further evidence from the novel circular economy index and threshold effect.","authors":"Phuc Hung Nguyen, Thai Nguyen Le, Minh Tam Pham, Minh Quy Trinh","doi":"10.1007/s11356-024-34855-w","DOIUrl":"https://doi.org/10.1007/s11356-024-34855-w","url":null,"abstract":"<p><p>The circular economy has been identified as a critical keyword for achieving the Sustainable Development Goals. Nevertheless, there is a lack of in-depth empirical literature on the impact mechanisms of the circular economy (CE) and economic growth (GDP) in mitigating e-waste generation (waste electrical and electronic equipment - WEEE). Given Europe's leading position in e-waste generation per capita, the study aims to scrutinize the interplay between CE, GDP, and WEEE for 2010-2020. The research applies advanced econometric methods, primarily centered around the system generalized method of moment and dynamic panel threshold. It was noteworthy that different CE indicators exhibited varying effects on WEEE through the econometric analysis. Therefore, the research uniquely utilized the entropy weight method to compute a holistic composite index for the circular economy (CEI) and gained some interesting findings. Firstly, CEI significantly reduced WEEE, while GDP drove its increase. However, an overly developed CEI of 0.7616 counteracted its beneficial effect. Secondly, the synergy of CEI*GDP engendered the circular economy rebound effect, diminishing environmental benefits. Thirdly, in the circular context, the environmental Kuznets curve was validated, showcasing an inverted U-shaped pattern. Finally, the study found CEI to have different threshold effects, with thresholds of 0.2161 to inhibit WEEE, 0.2114 to avert the circular economy rebound effect, and 0.2360 to leverage GDP in reducing WEEE. These outcomes give insights to policymakers in designing sound policies targeting circular economy development and decoupling e-waste generation from economic growth towards the United Nations' SDGs.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142124468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}