Manganese reductive dissolution coupled to Sb mobilization in contaminated shooting range soil
Appl Microbiol Biotechnol. 2024 Apr 10;108(1):295. doi: 10.1007/s00253-024-13133-2.ABSTRACTA "redox-stat" RMnR bioreactor was employed to simulate moderately reducing conditions (+ 420 mV) in Sb-contaminated shooting range soils for approximately 3 months, thermodynamically favoring Mn(IV) reduction. The impact of moderately reducing conditions on elemental mobilization (Mn, Sb, Fe) and speciation [Sb(III) versus Sb(V); Fe2+/Fe3+] was compared to a control bioreactor RCTRL without a fixed redox potential. In both bioreactors, reducing conditions were accompanied by an increase in effluent Sb(V) and Mn(II) concentrations, s...
Source: Applied Microbiology and Biotechnology - April 10, 2024 Category: Microbiology Authors: Lara Costa Mathieu Martinez Marcel Suleiman Rolf Keiser Moritz Lehmann Markus Lenz Source Type: research
Evolution of the redox-altered, two-tiered Muralha Flow in the Fronteira Oeste Rift, southern Paran á Volcanic Province
An Acad Bras Cienc. 2024 Apr 5;96(1):e20231088. doi: 10.1590/0001-3765202420231088. eCollection 2024.ABSTRACTThe thorough redox alteration of a lava flow is an undescribed feature in intraplate basaltic provinces. The Early Cretaceous (134.5 Ma) Paraná Province displays that alteration in the major Muralha Flow. This oxidized and reduced flow from the southern part of the province was studied with satellite images, field surveying, petrography, and published whole rock geochemistry. The 100 x 100 km flow from the Cuesta de Haedo presents two hydrothermal tiers - lower Tier 1 is gray to white, upper Tier 2 is red. Iron oxy...
Source: An Acad Bras Cienc - April 10, 2024 Category: Science Authors: L éo A Hartmann Leonardo Cardoso Renner Eduarda Klabunde Source Type: research
Biomineralized manganese oxide mediated nitrogen-contained wastewater treatment
Bioresour Technol. 2024 Apr 9;400:130689. doi: 10.1016/j.biortech.2024.130689. Online ahead of print.ABSTRACTIn recent years, manganese (Mn) has emerged as an accelerator for nitrogen metabolism. However, the bioactivity of manganese is limited by the restricted contact between microbes and manganese minerals in the solid phase and by the toxicity of manganese to microbes. To enhance the bioactivity of solid-phase manganese, biomineralized manganese oxide (MnOx) modified by Lactobacillus was introduced. Nitrogen removal performance have confirmed the effective role of biomineralized MnOx in accelerating the removal of tota...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Yingying Liu Xinshan Song Zhongshuo Xu Yifei Wang Xiaoxiao Hou Yuhui Wang Xin Cao Wei Wang Source Type: research
Manganese reductive dissolution coupled to Sb mobilization in contaminated shooting range soil
Appl Microbiol Biotechnol. 2024 Apr 10;108(1):295. doi: 10.1007/s00253-024-13133-2.ABSTRACTA "redox-stat" RMnR bioreactor was employed to simulate moderately reducing conditions (+ 420 mV) in Sb-contaminated shooting range soils for approximately 3 months, thermodynamically favoring Mn(IV) reduction. The impact of moderately reducing conditions on elemental mobilization (Mn, Sb, Fe) and speciation [Sb(III) versus Sb(V); Fe2+/Fe3+] was compared to a control bioreactor RCTRL without a fixed redox potential. In both bioreactors, reducing conditions were accompanied by an increase in effluent Sb(V) and Mn(II) concentrations, s...
Source: Applied Microbiology and Biotechnology - April 10, 2024 Category: Microbiology Authors: Lara Costa Mathieu Martinez Marcel Suleiman Rolf Keiser Moritz Lehmann Markus Lenz Source Type: research
Evolution of the redox-altered, two-tiered Muralha Flow in the Fronteira Oeste Rift, southern Paran á Volcanic Province
An Acad Bras Cienc. 2024 Apr 5;96(1):e20231088. doi: 10.1590/0001-3765202420231088. eCollection 2024.ABSTRACTThe thorough redox alteration of a lava flow is an undescribed feature in intraplate basaltic provinces. The Early Cretaceous (134.5 Ma) Paraná Province displays that alteration in the major Muralha Flow. This oxidized and reduced flow from the southern part of the province was studied with satellite images, field surveying, petrography, and published whole rock geochemistry. The 100 x 100 km flow from the Cuesta de Haedo presents two hydrothermal tiers - lower Tier 1 is gray to white, upper Tier 2 is red. Iron oxy...
Source: An Acad Bras Cienc - April 10, 2024 Category: Science Authors: L éo A Hartmann Leonardo Cardoso Renner Eduarda Klabunde Source Type: research
Evolution of the redox-altered, two-tiered Muralha Flow in the Fronteira Oeste Rift, southern Paran á Volcanic Province
An Acad Bras Cienc. 2024 Apr 5;96(1):e20231088. doi: 10.1590/0001-3765202420231088. eCollection 2024.ABSTRACTThe thorough redox alteration of a lava flow is an undescribed feature in intraplate basaltic provinces. The Early Cretaceous (134.5 Ma) Paraná Province displays that alteration in the major Muralha Flow. This oxidized and reduced flow from the southern part of the province was studied with satellite images, field surveying, petrography, and published whole rock geochemistry. The 100 x 100 km flow from the Cuesta de Haedo presents two hydrothermal tiers - lower Tier 1 is gray to white, upper Tier 2 is red. Iron oxy...
Source: An Acad Bras Cienc - April 10, 2024 Category: Science Authors: L éo A Hartmann Leonardo Cardoso Renner Eduarda Klabunde Source Type: research
Evolution of the redox-altered, two-tiered Muralha Flow in the Fronteira Oeste Rift, southern Paran á Volcanic Province
An Acad Bras Cienc. 2024 Apr 5;96(1):e20231088. doi: 10.1590/0001-3765202420231088. eCollection 2024.ABSTRACTThe thorough redox alteration of a lava flow is an undescribed feature in intraplate basaltic provinces. The Early Cretaceous (134.5 Ma) Paraná Province displays that alteration in the major Muralha Flow. This oxidized and reduced flow from the southern part of the province was studied with satellite images, field surveying, petrography, and published whole rock geochemistry. The 100 x 100 km flow from the Cuesta de Haedo presents two hydrothermal tiers - lower Tier 1 is gray to white, upper Tier 2 is red. Iron oxy...
Source: An Acad Bras Cienc - April 10, 2024 Category: Science Authors: L éo A Hartmann Leonardo Cardoso Renner Eduarda Klabunde Source Type: research
Mechanistic study on the promotion of Ca < sup > 2+ < /sup > leaching in steel slag through high-temperature solid waste modification
This study delves into the effects of various solid waste modifications on the leaching of Ca2+ and the total iron content within steel slag. Results show that high-basicity modified slag forms Ca2(Al, Fe)2O5, reducing calcium leaching. Low-alkalinity modified slag produces calcium-rich aluminum minerals and also reduces the leaching of Ca2+ ions. At a basicity of 2.5, coal gangue, fly ash, and blast slag achieve maximum Ca2+ leaching rates of 88.93%, 89.46%, and 90.17%, respectively, with corresponding total iron contents of 41.46%, 37.72%, and 35.29%. Upgraded coal gangue exhibits a 50.02% increase in calcium leaching an...
Source: Environmental Science and Pollution Research International - April 9, 2024 Category: Environmental Health Authors: Dongfeng He Liu Yang Yinbo Luo Hongbo Zhao Guoping Liu Zhanjun Wu Source Type: research
Mechanistic study on the promotion of Ca < sup > 2+ < /sup > leaching in steel slag through high-temperature solid waste modification
This study delves into the effects of various solid waste modifications on the leaching of Ca2+ and the total iron content within steel slag. Results show that high-basicity modified slag forms Ca2(Al, Fe)2O5, reducing calcium leaching. Low-alkalinity modified slag produces calcium-rich aluminum minerals and also reduces the leaching of Ca2+ ions. At a basicity of 2.5, coal gangue, fly ash, and blast slag achieve maximum Ca2+ leaching rates of 88.93%, 89.46%, and 90.17%, respectively, with corresponding total iron contents of 41.46%, 37.72%, and 35.29%. Upgraded coal gangue exhibits a 50.02% increase in calcium leaching an...
Source: Environmental Science and Pollution Research International - April 9, 2024 Category: Environmental Health Authors: Dongfeng He Liu Yang Yinbo Luo Hongbo Zhao Guoping Liu Zhanjun Wu Source Type: research
Competitive adsorption of heavy metals onto xanthate-modified sludge hydrochar and its solidification as secondary minerals
In this study, a sulfur-modified magnetic hydrochar was synthesized by grafting thiol-containing groups onto the sludge-derived hydrochar. The modified hydrochar exhibited effective adsorption of Cu2+, Pb2+, Zn2+, and Cd2+ over a wide pH range and in the presence of coexisting ions, and showed almost no secondary leaching in three acidic solutions. In the mult-metal ion system, the modified hydrochar exhibited maximum adsorption capacities were 39.38, 105.74, 26.53, and 38.11 mg g-1 for Cu2+, Pb2+, Zn2+, and Cd2+, respectively. However, the binding capacity and adsorption amount of modified hydrochar for metal ions were lo...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Chuanjin Lin Bin Dong Zuxin Xu Source Type: research
Competitive adsorption of heavy metals onto xanthate-modified sludge hydrochar and its solidification as secondary minerals
In this study, a sulfur-modified magnetic hydrochar was synthesized by grafting thiol-containing groups onto the sludge-derived hydrochar. The modified hydrochar exhibited effective adsorption of Cu2+, Pb2+, Zn2+, and Cd2+ over a wide pH range and in the presence of coexisting ions, and showed almost no secondary leaching in three acidic solutions. In the mult-metal ion system, the modified hydrochar exhibited maximum adsorption capacities were 39.38, 105.74, 26.53, and 38.11 mg g-1 for Cu2+, Pb2+, Zn2+, and Cd2+, respectively. However, the binding capacity and adsorption amount of modified hydrochar for metal ions were lo...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Chuanjin Lin Bin Dong Zuxin Xu Source Type: research
Longitudinal changes in adverse effects reporting in multiple dietary supplement classifications: The US military dietary supplement use study
In conclusion, AEs reported at baseline did not deter many participants from using DSs in the follow-up period, and many SMs reporting AEs at baseline continued reporting them at follow-up.PMID:38582347 | DOI:10.1016/j.fct.2024.114635 (Source: Food and Chemical Toxicology)
Source: Food and Chemical Toxicology - April 6, 2024 Category: Food Science Authors: Joseph J Knapik Daniel W Trone Ryan A Steelman Harris R Lieberman Source Type: research
Competitive adsorption of heavy metals onto xanthate-modified sludge hydrochar and its solidification as secondary minerals
In this study, a sulfur-modified magnetic hydrochar was synthesized by grafting thiol-containing groups onto the sludge-derived hydrochar. The modified hydrochar exhibited effective adsorption of Cu2+, Pb2+, Zn2+, and Cd2+ over a wide pH range and in the presence of coexisting ions, and showed almost no secondary leaching in three acidic solutions. In the mult-metal ion system, the modified hydrochar exhibited maximum adsorption capacities were 39.38, 105.74, 26.53, and 38.11 mg g-1 for Cu2+, Pb2+, Zn2+, and Cd2+, respectively. However, the binding capacity and adsorption amount of modified hydrochar for metal ions were lo...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Chuanjin Lin Bin Dong Zuxin Xu Source Type: research
Competitive adsorption of heavy metals onto xanthate-modified sludge hydrochar and its solidification as secondary minerals
In this study, a sulfur-modified magnetic hydrochar was synthesized by grafting thiol-containing groups onto the sludge-derived hydrochar. The modified hydrochar exhibited effective adsorption of Cu2+, Pb2+, Zn2+, and Cd2+ over a wide pH range and in the presence of coexisting ions, and showed almost no secondary leaching in three acidic solutions. In the mult-metal ion system, the modified hydrochar exhibited maximum adsorption capacities were 39.38, 105.74, 26.53, and 38.11 mg g-1 for Cu2+, Pb2+, Zn2+, and Cd2+, respectively. However, the binding capacity and adsorption amount of modified hydrochar for metal ions were lo...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Chuanjin Lin Bin Dong Zuxin Xu Source Type: research
Longitudinal changes in adverse effects reporting in multiple dietary supplement classifications: The US military dietary supplement use study
In conclusion, AEs reported at baseline did not deter many participants from using DSs in the follow-up period, and many SMs reporting AEs at baseline continued reporting them at follow-up.PMID:38582347 | DOI:10.1016/j.fct.2024.114635 (Source: Food and Chemical Toxicology)
Source: Food and Chemical Toxicology - April 6, 2024 Category: Food Science Authors: Joseph J Knapik Daniel W Trone Ryan A Steelman Harris R Lieberman Source Type: research
