Geochemical fractionation of manganese in the Riogrande II reservoir, Antioquia, Colombia

Salazar, G. J. P.; Torre, M.C Alfaro de la; Aguirre, Ramírez; Briones-Gallardo, Roberto; Cedeño, C. J.; Peñuela, Mariana

doi:10.1007/s12665-012-1947-x

Cited by 10 publications

(6 citation statements)

References 19 publications

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“…This study further supports the fact that knowledge of the levels of toxic and potentially toxic elements, especially in the most mobile fractions, is an important tool for environmental risk assessment (1,10,29,31).…”

Section: Resultssupporting

confidence: 80%

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Content and Mobility Behavior of Iron and Manganese in Asphaltite Burning Residue Using ICP-OES

Aydın¹

2014

At.Spectrosc.

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Section: Resultssupporting

confidence: 80%

“…The first fraction in ABR is the most labile form that can be easily leached into the environment when the ABR is rinsed by rain or other water bodies. Thus, it can be stated that this fraction is the most active part in nature which poses an environmental risk to human beings and all biological species (29,30).…”

Section: Resultsmentioning

confidence: 99%

Content and Mobility Behavior of Iron and Manganese in Asphaltite Burning Residue Using ICP-OES

Aydın¹

2014

At.Spectrosc.

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“…The study presented here did not monitor this mineral phase in sediments (Salazar et al 2013) but rather showed the desorption processes of Mn due to the increased concentration of H 1 ions. This is most likely a result of aerobic microbial respiration related to internal currents that allow oxygen to reach the lower gate of the reservoir's intake tower in the dry season.…”

Section: Discussionmentioning

confidence: 84%

“…However, the organic matter present in the sediment and water column (Salazar et al 2013) decreases the redox potential-Eh to reducing and strongly reducing conditions at the sediment-water interface. This is a result of bacterial activity, where the reduction of the oxyhydroxides of Mn and Fe favors the mobility of Mn 21 .…”

Section: Discussionmentioning

confidence: 99%

Spatial and Temporal Behavior of Soluble Manganese at the Sediment–Water Interface in the Riogrande II Reservoir in Colombia

2015

Self Cite

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The behavior of manganese (Mn) at the sediment-water interface in bodies of water such as lakes and reservoirs is dependent on physicochemical factors such as pH, redox potential-Eh, organic matter, specific conductance, and the presence of organic and inorganic complexes. These allow the mobilization of Mn from the sediment to the water column and promote its precipitation as Mn oxyhydroxide. For the Riogrande II reservoir in Colombia (2550 m), it was found that redox potential-Eh below 1350 mV is not appropriate for oxide stability. The availability and mobility of these oxides are more associated with organic complexation and desorption from sediments when the pH changes from neutral conditions to slightly acidic conditions (6.0). However, when the lower gates of the reservoir are opened during the dry season, the entry of oxygenated bottom currents most likely increases the dissolved oxygen (DO) and redox potential-Eh. Similarly, the increase in soluble Mn at the intake tower during the dry season is more associated with desorption than with reductive dissolution.The primary objective of this study is to determine the main physicochemical factors favoring Mn remobilization from sediment to the water column and its relation to the operating mechanisms of the intake water tower of the Riogrande II reservoir.One of the most notable results of this study is the observation that the operating mechanisms of the Riogrande II reservoir not only affect the type of water that is captured but also influence the geochemical processes at the bottom of the reservoir and in the sediment.The results of this study highlight the influence of hydraulic processes on surface water bodies as regards the dynamics of metal remobilization, the generation of pollution into the water column, and the increasing costs of treatment and purification in reservoirs in high mountain areas in tropical countries.

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“…However, there are a variety of trace element speciation procedures that have environmental implications in soils and sediments [ 39 , 40 , 41 ]. For the chemical separation of Cd in sediments, the European Community Bureau of Reference (BCR) sequential extraction procedure was recommended [ 42 , 43 ]. BCR procedure has been widely used to detect specific chemical forms of heavy metals in various environmental mediums, including sediments.…”

Section: Methodsmentioning

confidence: 99%

Environmental Geochemistry and Fractionation of Cadmium Metal in Surficial Bottom Sediments and Water of the Nile River, Egypt

El-Saadani

Wang

Zhang

et al. 2022

Toxics

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Heavy metals such as cadmium (Cd) pollute the environment. Heavy metal pollution endangers the Nile River since it serves as an irrigation and freshwater source for the cities and farms that line its banks. Water and sediment samples from the Nile River were tested for Cd content. In addition, a sequential experiment analytical method was performed to determine the metal’s relative mobility. According to the data, there is an average of 0.16 mg kg−1 of Cd in sediments. The BeniSuef water treatment plant and brick factory, the iron and steel factory of Helwan, the oil and detergent factory of Sohag, and the discharge of the cement factory in Samalut had the greatest concentration of Cd in their vicinity. According to the risk assessment code, there are four categories of Cd: residual (57.91%), acid-soluble (27.11%), reducible (11.84%), and oxidizable (3.14%). Bioavailable and mobile Cd levels in sediment and water were found in Beni Suef, Aswan; Helwan; Samalut; Sohag; and Helwan. Because the other metal is highly bioavailable, its concentration is not a risk factor at the Samalut station. Cd’s toxicity and bioaccumulation make it an extra hazard to aquatic animals and human life. There should be a deterministic approach to monitoring Cd near industrial sources.

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Geochemical fractionation of manganese in the Riogrande II reservoir, Antioquia, Colombia

Cited by 10 publications

References 19 publications

Content and Mobility Behavior of Iron and Manganese in Asphaltite Burning Residue Using ICP-OES

Content and Mobility Behavior of Iron and Manganese in Asphaltite Burning Residue Using ICP-OES

Spatial and Temporal Behavior of Soluble Manganese at the Sediment–Water Interface in the Riogrande II Reservoir in Colombia

Environmental Geochemistry and Fractionation of Cadmium Metal in Surficial Bottom Sediments and Water of the Nile River, Egypt

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