Ecotoxicological consequences of manganese mining pollutants and their biological remediation

Dey, Santanu S.; Tripathy, Banismita; Kumar, M.S.; Das, Alok Prasad

doi:10.1016/j.enceco.2023.01.001

Cited by 64 publications

(10 citation statements)

References 62 publications

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“…The participants in our study reported frequent headaches and dizziness as some of the major health problems encountered. This phenomenon is similar to those reported in the study [ 59 ]. Despite the fact that there are limited studies on occupational exposures to Mn, the study of [ 76 ], a study of haemolysis of particulate matter (PM) on red blood cells from a coal-burning lung cancer epidemic area, the report showed that Mn had a significant positive correlation with the oxidative capacity of PM in coal-burning environments, and this is a usual practice from some of the participants in our study.…”

Section: Resultssupporting

confidence: 93%

“…This suggests that those individuals may have been exposed to high levels of Mn in their previous residential areas [ 58 ]. The values of Mn recorded from site 1, an industrial area with active activities taking place from the industry situated opposite the informal settlement, are similar to those reported by Dey et al [ 59 ], where the blood Mn from samples collected around a mining site exceeded the recommended limit. Their findings showed that Mn is considered a systemic toxicant that can damage multiple organs of humans.…”

Section: Resultssupporting

confidence: 85%

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Possible Sources of Trace Metals in Obese Females Living in Informal Settlements near Industrial Sites around Gauteng, South Africa

Lion

Olowoyo

2023

IJERPH

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Trace metals have been reported in the literature to be associated with obesity. Exposure to some trace metals such as Mn, Cr, Ni, Cd, and Pb may pose a serious health risk to individuals living around a polluted environment. The present study assessed the levels of trace metals in the blood of obese females living around industrial areas in Pretoria, South Africa. The study was carried out using a mixed methods approach. Only females with a BMI ≥ 30.0 were considered. A total of 120 obese females participated in the study (site 1: 40—industrial area, site 2: 40—industrial area, and site 3: 40—residential area), aged 18–45 and not in menopause. Blood samples were analysed for trace metal content using inductively coupled plasma mass spectrometry (ICP-MS). The mean concentrations of trace metals were in the order Mn > Pb > Cr > Co > As > Cd (site 1), Pb > Mn > Co > As > Cd (site 2), and Mn > Cr > Co > As > Pb > Cd (site 3). The blood Mn from site 1 ranged from 6.79 µg/L–33.99 µg/L, and the mean differences obtained from the participants from different sites were significant (p < 0.01). The blood levels of Mn, Pb, Cr, Co, As, and Cd were above the recommended limits set by the WHO in some of the participants. The present study noted, among others, closeness to industrial areas, lifestyle decisions such as the use of tobacco products by their partners indoors, and the method used for cooking as factors that might have accounted for the blood levels of Mn, Pb, Cd and Co. The study showed that there is a need for constant monitoring of the levels of trace metals in the blood of those living in these areas.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 85%

Possible Sources of Trace Metals in Obese Females Living in Informal Settlements near Industrial Sites around Gauteng, South Africa

Lion

Olowoyo

2023

IJERPH

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“…The previously mentioned sites are exposed to metals such as Mn, Fe, and Zn, which are considered essential micronutrients in physiological processes, however, overexposure to these elements can cause neurological symptoms such as cognitive, behavioural, and motor deficits (Kim et al, 2022). It has been reported that Mn can cause skeletal defects, infertility, heart disease, and hypertension (Dey et al, 2023). It is also associated with harmful effects on the central nervous system, as Mn accumulates in the brain, which is why exposure has been associated with Parkinson's in adults and other neurodegenerative conditions (Lindner et al, 2022).…”

Section: Chronic Daily Intakementioning

confidence: 99%

Could the presence of ferrihydrite identified in a riverbed impacted by mining leachates be linked to the reduction in the Heavy Metals Contamination Index?

Morales-Mendoza,

Flores-Trujillo,

Razo-Jiménez

et al. 2024

Preprint

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Water bodies have suffered degradation due to the discharge of pollutants, including potentially toxic elements (PTEs), primarily from mining operations. One such instance is the extraction of metallic elements in Taxco de Alarcón, Mexico. In this study, elements were analysed by Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) in 11 points of Acamixtla, Taxco, and San Juan Rivers. The data analysis included principal components analysis (PCA) and determination of Heavy-Metals and Metalloids Pollution Index (HMPI), as well as their Health Risk Assessment. Additionally, solid samples from RSJMG S2.3 were characterized by Fourier Transform-Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM). The elements (As, Cr, Ni, Zn, Fe, Mn, Cu, Cd, Pb, Se, and Li) were identified in the water samples. PCA revealed that component one, accounted for 82.8% of the variability data, and Pearson correlation analysis showed a significant (p < 0.05) correlation of Fe with As, Cu, Pb, and Zn. The highest HMPI (8491.52) was detected at RSJMG S2.3 point. Other points exhibited a 96.45 % to 100% lower exposure than RSJMG S2.3 point, that could be due to metal complexation with naturally occurring mineral ferrihydrite (Fe10 O14(OH)2), that was identified by SEM and FTIR in solids collected at the RSJMG S2.3 point. For Health Risk Assessment, the chronic oral daily intake and dermal exposure were predominant in all points impacted by leachates downstream of the San Juan River. Likewise, for the elements Cd, As and Zn were highest values and all sites presented high hazard index.

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“…In recent years, the concentration of manganese in underground wells in many countries has far exceeded the standards of the World Health Organization [ 6 , 7 , 8 , 9 ]. Overexposure to manganese can cause a variety of negative health effects for humans [ 10 , 11 ], and high manganese content in plants will lead to crop necrosis and cotton wrinkling, thus affecting the food and textile industry [ 12 ]. Studies have shown that in manganese-polluted areas, the soil and groundwater are usually containing acidic organic matter, so manganese mostly exists in the form of divalent ions [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Modification of Multiwalled Carbon Nanotubes and Their Mechanism of Demanganization

Zhou

Mao

et al. 2023

Molecules

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Multiwalled carbon nanotubes (MWCNTs) were modified by oxidation and acidification with concentrated HNO3 and H2SO4, and the modified multiwalled carbon nanotubes (M-MWCNTs) and raw MWCNTs were characterized by several analytical techniques. Then the demanganization effects of MWCNTs and M-MWCNTs were well investigated and elucidated. The experimental data demonstrated that the adsorption efficiency of Mn(II) could be greatly promoted by M-MWCNTs from about 20% to 75%, and the optimal adsorption time was 6 h and the optimal pH was 6. The results of the kinetic model studies showed that Mn(II) removal by M-MWCNTs followed the pseudo-second-order model. Isothermal studies were conducted and the results demonstrated that the experimental data fitted well with the three models. The reliability of the experimental results was well verified by PSO–BP simulation, and the present conclusion could be used as a condition for further simulation. The research results provide a potential technology for promoting the removal of manganese from wastewater; at the same time, the application of various mathematical models also provides more scientific ideas for the research of the mechanism of adsorption of heavy metals by nanomaterials.

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Ecotoxicological consequences of manganese mining pollutants and their biological remediation

Cited by 64 publications

References 62 publications

Possible Sources of Trace Metals in Obese Females Living in Informal Settlements near Industrial Sites around Gauteng, South Africa

Possible Sources of Trace Metals in Obese Females Living in Informal Settlements near Industrial Sites around Gauteng, South Africa

Could the presence of ferrihydrite identified in a riverbed impacted by mining leachates be linked to the reduction in the Heavy Metals Contamination Index?

Modification of Multiwalled Carbon Nanotubes and Their Mechanism of Demanganization

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