Sorption of heavy metals by Lithuanian glauconite

Smith, Edward H.; Lu, Weiping; Vengris, Tomas; Binkienė, Rima

doi:10.1016/s0043-1354(96)00004-8

Cited by 50 publications

(27 citation statements)

References 14 publications

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“…Clinoptilolite adsorbs ammonium ions from leachate [12], but also metal ions [13,14]. Glauconite, a three-layer sheet aluminosilicate, has been found to reduce heavy metal cations, lessen unpleasant odour and diminish murkiness of landfill leachate [15,16].…”

Section: Introductionmentioning

confidence: 99%

Poorly humified peat as an adsorbent for metals in wastewater

2002

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Metal adsorption and surface charge determinations were performed previously on well-characterised Sphagnum and Carex peat samples. The aim of this investigation was to determine metal adsorption from complex wastewaters onto these peat samples and compare it to the adsorption onto peat granules, clinoptilolite, glauconite and a flue dust from steel production. A sulphide mine leachate, a landfill leachate and a laundry wastewater were chosen, giving a variation in pH, ionic strength, total organic carbon and concentrations of metals. Metal adsorption was determined in batch and column experiments. The wastewater composition was of great importance for metal removal efficiency, mainly due to the difference in dominating metal species. In the sulphide mine leachate, containing free metal ions, a high metal adsorption was observed onto both peat and inorganic adsorbents. In the landfill leachate the metals formed carbonate and organic complexes and a low metal removal was achieved. Contrary to the leachates, the laundry wastewater contained suspended particles. The high amount of metals removed, 80% of the Cu and 30-60% of the Zn concentration, was probably withdrawn bound to the particle fraction. The highest removal of metal ions was obtained in the sulphide mine leachate with Carex peat, removing 97-99% of the Zn and 85-100% of the Cu content. The Sphagnum peat sample removed 37-77% of the Zn and 80-100% of the Cu content. The differences found between Sphagnum and Carex peat were attributed to the original chemistry of the plant material and the habitat conditions at the time of peat formation. Generally, the combination of glauconite or clinoptilolite with the peat samples in column experiments gave a minor improvement in metal removal. r

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Section: Introductionmentioning

confidence: 99%

Poorly humified peat as an adsorbent for metals in wastewater

2002

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“…The concentration of zinc in the aqueous leachate, after leaching lightweight of aggregate on a clay and natural glauconite base (10%, 15%, 20%, 25%) and firing at 1140°C, was low and varied from 5.06 to 18.22 µg/dm 3 and don't exceed 15% of Zn content. Whilst in the samples fired at the temperature of 1200ºC zinc concentration was found to be higher, ranging from 17.58 to 21.34 µg/dm 3 and don't exceed 18% of Zn content.…”

Section: Resultsmentioning

confidence: 97%

“…Glauconite used for the experiments had a grain fraction of 0.125-0.5 mm (60% of total mass of glauconite), with specific density of 2.74 g/cm 3 and bulk density of 1.38 g/cm 3 . Filtration coefficient is equal 2.60·10 -3 cm/s which corresponds to the values of filtration coefficient for midgrained soils.…”

Section: Resultsmentioning

confidence: 99%

“…Samples prepared in this way were shaken for 5 hours, and pH of the solutions throughout the process was kept constant by using 1N HNO 3 . The very large liquid to solid ratio ensures that the contaminant release is not constrained by its solubility.…”

Section: Methodsmentioning

confidence: 99%

“…Glauconite is a clay mineral which due to numerous specific surface properties is useful in capturing contaminants in the form of heavy metal cations from aqueous solutions [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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