Environmental assessment: study of metals in fluvial sediments in sites impacted by coal processing and steel industry activities

Teixeira, Elba Calesso; Cortés-Sánchez, Julián David; Migliavacca, Daniela Montanari; Binotto, Raquel Barros; Fachel, Jandyra Maria Guimarães

doi:10.1016/s0016-2361(99)00290-2

Cited by 10 publications

(3 citation statements)

References 4 publications

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“…In Brazil, about 3 million metric tons of ash is produced every year from coal burned to generate thermoelectricity . Leaching of the ash gives toxic elements potential access to groundwater, contaminating current or future water sources . Another byproduct of coal combustion is flue gas desulfurization (FGD) gypsum.…”

Section: Introductionmentioning

confidence: 99%

“…5 Leaching of the ash gives toxic elements potential access to groundwater, contaminating current or future water sources. 17 Another byproduct of coal combustion is flue gas desulfurization (FGD) gypsum. An electric power station block can generate up to 20 tons of FGD gypsum per hour, and there are insufficient applications for such a high amount.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Zeolite/Backfill Blend for Acid Mine Drainage Remediation in Coal Mine

et al. 2018

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Brazilian coal exhibits high ash and sulfur content, making it more susceptible to acid mine drainage (AMD). Furthermore, combustion of this coal generates a significant amount of ash containing amorphous silicon and aluminum oxides, allowing alkaline hydrothermal processing of this waste via zeolites. These versatile compounds have been suggested as an alternative material for AMD remediation. This study aims to evaluate the use of zeolite Na–P1 in backfill blends for application in coal mines. Laboratory scale leaching experiments were performed, and several techniques (major and trace elements, pH, and conductivity) were monitored over time, in order to assess AMD remediation and the mobilization of ions in leachates using different zeolite/tailing blends. The results indicate that the addition of zeolites, obtained from coal ash, promotes the remediation of metal content in water generated by AMD and is therefore a more beneficial process in the removal of metal ions. With regard to the 50:50 backfill/zeolite blend, reductions of 100, 98, 39, 55, 94, and 41% were observed in aluminum, iron, calcium, magnesium, zinc, and manganese content, respectively, after 7 days of leaching. The increase in pH caused by zeolite addition promoted the precipitation of both metal ions and sulfate ions. The addition of 50% or 25% of zeolite in the backfill sample increased pH from 2.36 to 8.38 or 4.66, respectively, over a leaching period of 7 days.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Zeolite/Backfill Blend for Acid Mine Drainage Remediation in Coal Mine

et al. 2018

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“…Thus, the quality of the water is just as important as the quantity. Several studies around the world [6][7][8][9][10][11][12][13][14][15][16][17] and in Algeria [18][19][20][21][22][23][24][25][26][27][28][29][30] are reported on the effects of agricultural, industrial and urban effluents on the quality of surface water. Wadi El Arab controlled by Babar Dam, was built for the supply of potable water and the supply of industrial water and irrigation.…”

Section: Introductionmentioning

confidence: 99%

Impact of Climat Change and Human Activity on Water Quality of Babar Dam, Algeria

Aissam

2018

CERJ

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The quality of surface water has in recent years, a deterioration largely due to a climate change. The objective of this study was to evaluate the impact of a long drought and human activities on water quality in a dam of eastern Algeria, the Babar. To achieve this, a study of the composition of the waters of the dam using the method of trends was performed. The results show that the water has a calcium-magnesium-sulfated facies. They show that most parameters follow negative trends, with the exception of K (41.56%), NO 2 (5%) and NO 3 (35.62%). The use of potash fertilizers and the discharge spills of village waste directly into the dam basin without any prior treatment leads to an increase in K. The increase in NO 3 is mainly due to fertilizer and nitrification of ammonium (-61%), which was accompanied by a decrease in the levels of dissolved oxygen (-7.5%). The decrease in the orthophosphate content (-80%) is due to its low mobility on the one hand, and to the removal of phosphorus on the other hand by the processes of mechanical erosion from the adsorption of the latter by the soil colloids. This approach has shown that drought and anthropogenic activity have a negative impact on the quality of surface water.

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Delineation of Water and Sediment Contamination in River Near a Coal Ash Pond in Orissa, India

Tripathy

Praharaj

Coal Combustion Byproducts and Environmental Issues

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Environmental assessment: study of metals in fluvial sediments in sites impacted by coal processing and steel industry activities

Cited by 10 publications

References 4 publications

Evaluation of Zeolite/Backfill Blend for Acid Mine Drainage Remediation in Coal Mine

Evaluation of Zeolite/Backfill Blend for Acid Mine Drainage Remediation in Coal Mine

Impact of Climat Change and Human Activity on Water Quality of Babar Dam, Algeria

Delineation of Water and Sediment Contamination in River Near a Coal Ash Pond in Orissa, India

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