Removal of pollutants from acid mine wastewater using metallurgical by-product slags

Feng, D.; Deventer, J.S.J. van; Aldrich, Chris

doi:10.1016/j.seppur.2004.01.003

Cited by 166 publications

(90 citation statements)

References 12 publications

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“…In conclusion, the application of ultrasonic irradiation in the impregnation step was found to be beneficial to prepare with high adsorption capacity activated carbon for use as adsorbent to remove Ni 2+ from aqueous solutions. For the sake of comparison, Table 3 presents comparative values of nickel adsorption capacity for some adsorbents [26][27][28][29][30]. The comparison of the experimental adsorption capacity obtained in this study with the data in the literature for various adsorbents shows that activated carbon prepared from ultrasoundassisted KOH-impregnated hazelnut shell is an effective adsorbent of Ni +2 from aqueous solutions.…”

Section: Optimization Resultsmentioning

confidence: 74%

RESPONSE SURFACE METHODS OPTIMIZATION ON THE ADSORPTION OF Ni2+ FROM AQUEOUS SOLUTIONS ON THE ACTIVATED CARBON PREPARED FROM ULTRASOUND-ASSISTED KOH IMPREGNATED HAZELNUT SHELLS

Şayan¹,

Ingeç²

2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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The optimization of the adsorption of Ni 2+ from aqueous solutions was investigated by ultrasound-assisted preparation of activated carbon from alkaline impregnated hazelnut shells. To investigate the effects of independent variables such as particle size, ultrasonic power density, impregnation ratio, impregnation time, activation temperature and activation time on the adsorption of Ni 2+ from aqueous solutions, the experiments were designed by using the fractional factorial and central composite design method. Furthermore, the results were modelled statistically and optimized by using constrained optimization technic by means of the Matlab. The ultrasonic irradiation used for the alkaline impregnation into hazelnut shells was found to be beneficial for preparation of activated carbon for use as adsorbents to remove Ni 2+ from aqueous solutions.

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Section: Optimization Resultsmentioning

confidence: 74%

RESPONSE SURFACE METHODS OPTIMIZATION ON THE ADSORPTION OF Ni2+ FROM AQUEOUS SOLUTIONS ON THE ACTIVATED CARBON PREPARED FROM ULTRASOUND-ASSISTED KOH IMPREGNATED HAZELNUT SHELLS

Şayan¹,

Ingeç²

2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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“…However, the presence of slag, in both ratio of the 1:1 and 1:1.5, increased the pH, decreased the Eh, and reduced the concentration of metals and sulfate in the leachate. This condition inhibits the oxidation of pyrite, reduces the solubility of the metal and promotes the adsorption of metal compounds on mineral matter [22][23][24].…”

Section: Resultsmentioning

confidence: 99%

Ladle Slag of Electric Steelmaking as Alkaline Agent on Controlling of Acid Mine Drainage Generation

Machado¹,

Freitas²,

Villetti³

et al. 2013

JEP

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Commercial coal production in the southern region of Brazil (comprising the Paraná, Santa Catarina, and Rio Grande do Sul states) has been occurring since the beginning of the twentieth century. Regarding the Santa Catarina coalfields, about 60% -65% of the ROM coal is discharged at dump deposits as waste. These wastes can lead to the formation of acid mine drainage (AMD), a source of ground and surface water pollution. One of the technologies used for preventing AMD consists of the alkaline additive method. Thus, the aim of this work was to study, at laboratory scale, the DAM control by blending coal waste with a metallurgical slag. A coal-tailing sample was collected from a coal mine, and the slag was obtained from a semi-integrated steel plant. Static tests were carried out by the acid-base account method to determine the balance between the acid-producing and acid-consuming (neutralizing) mineral components of the samples. Kinetic tests were conducted in humidity cells, following the ASTM D 5744-96 method, for a period of 80 weeks. The results showed that the coal tailing generates AMD. However, environmental problems can be minimized by mixing the coal waste with the metallurgical slag in 1:1 or 1:1.5 proportions. The kinetic experiments proved that, in this condition, the lixiviation presents a higher pH and a lower concentration of acidity, metals, and sulfate. Finally, it is possible to conclude that the blending slag in coal tailing deposits can be a viable alternative for DAM control in coal mining.

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“…Natural materials, waste, and residue products from industrial or agricultural activities have excellent potential as economic adsorbents for heavy metals removal from aqueous solutions. The reduction of acidity and removal of metal ions from coal mining effluents using chitosan microspheres [8], zeolites [9], blast furnace slag [10], fly ash zeolite [11], and phosphatized dolomite [12] have been studied.…”

Section: Introductionmentioning

confidence: 99%

Reducing the Content of Metal Ions from Mine Water by Using Converter Sludge

Rozumová

Prehradná

2018

Water

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Abstract:The aim of this paper was to study of utilization of converter sludge waste as a sorbent. The sorbent was utilized to reduce the content of manganese, cobalt, and nickel ions from mine water. Sorbent utilized in this work was obtained from the metallurgical industry from a process of gas treatment in an oxygen converter. Converter sludge was characterized by X-ray diffraction, Scanning Electron Microscope, X-ray fluorescence spectroscopy, Specific Surface Area and Particle Size. Sorption experiments were conducted in a batch mode by using the real mine water. The impact of pH and contact time on the pollutant removal efficiency was observed. The sorption kinetics were evaluated with pseudo-first and pseudo-second order kinetic models. For the tested materials, the highest level of mine water purification was achieved; thus, the mine water could be discharged into the watercourse. The results of this study indicate that the application of metallurgical waste as a sorbent is highly effective for the treatment of multicomponent mine water.

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Removal of pollutants from acid mine wastewater using metallurgical by-product slags

Cited by 166 publications

References 12 publications

RESPONSE SURFACE METHODS OPTIMIZATION ON THE ADSORPTION OF Ni2+ FROM AQUEOUS SOLUTIONS ON THE ACTIVATED CARBON PREPARED FROM ULTRASOUND-ASSISTED KOH IMPREGNATED HAZELNUT SHELLS

RESPONSE SURFACE METHODS OPTIMIZATION ON THE ADSORPTION OF Ni2+ FROM AQUEOUS SOLUTIONS ON THE ACTIVATED CARBON PREPARED FROM ULTRASOUND-ASSISTED KOH IMPREGNATED HAZELNUT SHELLS

Ladle Slag of Electric Steelmaking as Alkaline Agent on Controlling of Acid Mine Drainage Generation

Reducing the Content of Metal Ions from Mine Water by Using Converter Sludge

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