Removal of heavy metals and neutralisation of acid mine drainage with un-activated attapulgite

Falayi, Thabo; Ntuli, Freeman

doi:10.1016/j.jiec.2013.07.007

Cited by 76 publications

(23 citation statements)

References 11 publications

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“…should be noticed that plenty of references have been concentrated on the removal of hazardous elements, such as As, Cr, Hg, Cd, Pb, Cu, Ni, Mo, and P [12][13][14][15][16][17][18][19][20]. Nevertheless, the researches of lanthanide or Nd recovery from water are still scarcity.…”

Section: Introductionmentioning

confidence: 99%

Selective and fast recovery of neodymium from seawater by magnetic iron oxide Fe3O4

You

2015

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Selective and fast recovery of neodymium from seawater by magnetic iron oxide Fe3O4

You

2015

Chemical Engineering Journal

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“…A comparison between unactivated [9] and activated attapulgite is detailed as follows. Unactivated attapulgite requires 10% m/v loading while activated attapulgite requires 2.5% m/v loading.…”

Section: Comparison Between Unactivated Attapulgite and Activated Attmentioning

confidence: 99%

“…Adsorption using clays has been shown to be a useful, cost effective method for heavy metal removal from AMD [7,8]. Unactivated attapulgite at 10% (m/v) solid loading has been shown to remove at least 93% of Co, Cu, Ni and Fe whilst removing 66% Mn [9]. To reduce the solid loading of the adsorbent there was a need to activate the attapulgite.…”

Section: Introductionmentioning

confidence: 99%

Effect of attapulgite calcination on heavy metal adsorption from acid mine drainage

Falayi

Ntuli

2015

Korean J. Chem. Eng.

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Attapulgite calcined at 973.15K was characterized and utilized as an adsorbent for the removal of heavy metals and neutralization of acid mine drainage (AMD) from a gold mine. Batch adsorption experiments were carried out using a thermostatic shaker. Activated attapulgite showed that it can neutralize AMD as it raised the pH from 2.6 to 7.3 after a residence time of 2 h. Metal ion removal after 2 h was 100% for Cu (II), 99.46% for Fe (II), 96.20% for Co (II), 86.92% for Ni (II) and 71.52% for Mn (II) using a 2.5% w/v activated attapulgite loading. The adsorption best fit the Langmuir isotherm; however, Cu (II), Co (II), and Fe (II) data fit the Freundlich isotherm as well. Calcination at 973.15 K resulted in the reduction of the equilibrium residence time from 4 to 2 h, solid loading reduction from 10 to 2.5% m/v and an increase in maximum adsorption capacity compared with unactivated attapulgite.

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“…Unactivated attapulgite was used to neutralized AMD and remove heavy metals as an adsorbent from a gold mine (Falayi and Ntuli, 2014). Attapulgite could raise pH to above 7 and showed great adsorption capacity for Cu(II), Fe(II), Co(II), Ni(II) and Mn(II).…”

Section: Calculated Distribution Coefficients (Kd) Showed That Bothmentioning

confidence: 99%

Mine Drainage and Oil Sand Water

Wei

Wolfe

2015

Water Environment Research

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Mine drainage from the mining of mineral resources (coal, metals, oil sand, or industrial minerals) remains as a persistent environmental problem. This review summarizes the scientific literature published in 2014 on the technical issues related to mine drainage or mine water in active and abandoned coal/hard rock mining sites or waste spoil piles. Also included in this review is the water from oil sand operations. This review is divided into the four sections: 1) mine drainage characterization, 2) prediction and environmental impact, 3) treatment technologies, 4) oil sand water. Many papers presented in this review address more than one aspect and different sections should not be regarded as being mutuallyexclusive or all-inclusive.

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Removal of heavy metals and neutralisation of acid mine drainage with un-activated attapulgite

Cited by 76 publications

References 11 publications

Selective and fast recovery of neodymium from seawater by magnetic iron oxide Fe3O4

Selective and fast recovery of neodymium from seawater by magnetic iron oxide Fe3O4

Effect of attapulgite calcination on heavy metal adsorption from acid mine drainage

Mine Drainage and Oil Sand Water

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