Evaluation of charcoal ash nanoparticles pollutant removal capacity from acid mine drainage rich in iron and sulfate

Kefeni, Kebede K.; Mamba, Bhekie B.

doi:10.1016/j.jclepro.2019.119720

Cited by 27 publications

(16 citation statements)

References 52 publications

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“…In addition, all examined ash materials increased the pH values for treated feed solutions without increasing the number of hydroxyl ions. Po-ash, BA-ash, and Min-ash raised the pH up to 9.6, while Eg-ash increased the pH to 8.8, which indicated that the basic nature of the ash materials was in agreement with other researchers [25,26,49,50].…”

Section: Assessment Of the Ability Of The Tested Ash Materials To Remove Ca Ionssupporting

confidence: 88%

“…Molecules 2021, 26, x FOR PEER REVIEW 10 of 22 ash increased the pH to 8.8, which indicated that the basic nature of the ash materials was in agreement with other researchers [25,26,49,50]. Regarding conductivity and TDS measurements from Figure 5b and Table 4, the results showed a 43% increment after adding a 10 g/L dose of ash materials for Po-ash, BAash, and Eg-ash, while Min-ash showed only a 30% increment.…”

Section: Assessment Of the Ability Of The Tested Ash Materials To Remove Ca Ionssupporting

confidence: 88%

“…Data derived from the XRD patterns indicated various soluble and non-soluble minerals such as carbonate and bicarbonate structures: nahcolite, kalicinite, bradleyite, calcite, scawtite, and spurrite. All alkali metals' carbonates or bicarbonates are highly soluble in water at a lower pH values, while other types of carbonates, such as CaCO 3 (s), are hardly soluble at higher pH levels [50]. Therefore, the existence of enormously soluble alkali bicarbonates (NaHCO 3 and KHCO 3 ) was responsible for the rapid augment in pH values and the formation of metal hydroxide at high rates according to the reactions described below [8,17,52].…”

Section: The Proper Mechanism For the Removal Of Ca Ions From An Aqueous Systemmentioning

confidence: 99%

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A Novel Alternative Methods for Decalcification of Water Resources Using Green Agro-Ashes

El-Nahas

Arafat²,

Din

et al. 2021

Molecules

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The strategic idea in this work was to increase pH values by employing natural alkali sources (i.e., HCO3− and CO32−) from four tested agro-ashes as an alternative to chemicals (i.e., lime or soda ash). The considerable proportion of carbonates and bicarbonates in the investigated ash products had remarkable features, making them viable resources. All ash materials showed a significant ability for Ca ion elimination at high initial Ca ion concentrations. A slight quantity of ash (10 g/L) was sufficient for usage on very hard water contents up to 3000 ppm. Finally, the tested agro-ash was free of cost. Furthermore, unlike other conventional precipitants, such as NaOH, Ca(OH)2, NaHCO3, Na2CO3, and CaO, they are cost effective and ecologically sustainable. There is no need to employ any additional chemicals or modify the agro-ash materials throughout the treatment process. The benefits of the manufactured ash were assessed using a SWOT analysis.

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Section: Assessment Of the Ability Of The Tested Ash Materials To Remove Ca Ionssupporting

confidence: 88%

Section: Assessment Of the Ability Of The Tested Ash Materials To Remove Ca Ionssupporting

confidence: 88%

Section: The Proper Mechanism For the Removal Of Ca Ions From An Aqueous Systemmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Alternative Methods for Decalcification of Water Resources Using Green Agro-Ashes

El-Nahas

Arafat²,

Din

et al. 2021

Molecules

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“…The FT-IR spectrum results confirm the formation and presence of different minerals in the sludge as indicated by the XRD data. The peaks found at 619.96 cm −1 are attributable to the metal oxides (such as iron oxide), which usually appear between 400 and 650 cm −1 ( Alexandrescu et al., 2010 ; Mahmoud, 2017 ; Ahmadi et al., 2020 ), the peaks 1426.24, 1639.39 and 1730.92 cm −1 might correspond to S=O vibration stretching of different sulphate minerals ( Kefeni and Mamba, 2020 ). The peak observed at 3315.94 cm −1 is ascribed to ν-OH due to water in the sludge ( Flores et al., 2019 ).…”

Section: Resultsmentioning

confidence: 99%

“…The mining sector is the major contributor to the economy of different countries ( Rakotonimaro et al., 2017 ). South Africa is one of those countries whose economy mainly depends on coal and gold mining activities ( Kefeni and Mamba, 2020 ). In 2019, these mining activities contributed almost 44.85% to South African gross domestic product ( Plecher, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Characterization and reusability suggestions of the sludge generated from a synthetic acid mine drainage treatment using sodium ferrate (VI)

Munyengabe

Zvinowanda

Zvimba

et al. 2020

Heliyon

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Mining activities are the main cause of generation of the voluminous sludge waste, loaded with metals precipitated from the treatment of acid mine drainage (AMD) and this is always disposed to the landfill. This study aimed at characterizing and suggesting the reusability potential of AMD sludge to reduce the environmental problem caused by its accumulation so that it could become a valuable material. The sludge was obtained after treating a synthetic AMD with a green oxidant sodium ferrate (VI) (Na 2 FeO 4 ) that was prepared by a wet oxidation method. Chemical and physical characterization of a dried sludge generated after treatment was then performed using the Fourier Transform-Infrared and X-Ray powder Diffraction spectroscopy. Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy also served to identify the surface morphology of the sludge. The sludge presented a high weight percentage of Fe and O and lower concentrations of other metals such as Al, Mn, Si, and Na. Nitrogen adsorption/desorption isotherms or Brunauer-Emmett-Teller (BET) was used to assess the surface area, pore volume and diameter of the sludge. The BET results showed that the surface area of the sludge obtained after treating the synthetic AMD using Na 2 FeO 4 was 31.50 ± 0.03 m 2 /g with pore diameter and volume of 52.50 nm and 0.41 cm 3 /g, respectively. However, the produced sludge could serve as an adsorbent to remove pollutants from water or to synthesize different magnetic nanocomposites due to its high surface area (>natural zeolite) and high composition of Fe and O.

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Application of Nanomaterials for Remediation of Pollutants from Mine Water Effluents

Vunain¹

2022

Application of Nanotechnology in Mining Processes

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Evaluation of charcoal ash nanoparticles pollutant removal capacity from acid mine drainage rich in iron and sulfate

Cited by 27 publications

References 52 publications

A Novel Alternative Methods for Decalcification of Water Resources Using Green Agro-Ashes

A Novel Alternative Methods for Decalcification of Water Resources Using Green Agro-Ashes

Characterization and reusability suggestions of the sludge generated from a synthetic acid mine drainage treatment using sodium ferrate (VI)

Application of Nanomaterials for Remediation of Pollutants from Mine Water Effluents

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