Heavy metals (Cd, Pb, Zn, Ni, Cu and Cr(III)) removal from water in Malaysia: Post treatment by high quality limestone

Aziz, Hamidi Abdul; Adlan, Mohd Nordin; Ariffin, Kamar Shah

doi:10.1016/j.biortech.2007.04.007

Cited by 433 publications

(169 citation statements)

References 28 publications

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“…1); however it provoked a slight pH increase and slight lowering in Cr ( sorption. But in the case of the forest soil and the granitic material, this amendment increased Cr(VI) sorption as compared with samples having similar pH values, which can be attributed to precipitation with carbonates, as signaled by Aziz et al (2008) studying chromium retention on limestone. Figure 3 shows chromium desorption percentage for the various materials after being added with 100 mg L −1 Cr(VI).…”

Section: Sorptionmentioning

confidence: 83%

Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration

et al. 2015

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Abstract. We used batch-type experiments to study Cr(VI) sorption/desorption on granitic material, forest soil, pyritic material, mussel shell, and on forest soil and granitic material amended with 12 t ha −1 (1.2 kg m −2 ) shell, considering the effects of varying Cr(VI) concentration and pH. Sequential extractions were carried out to fractionate adsorbed Cr(VI) and to determine the stability of Cr(VI) retention. The pyritic material had the highest Cr(VI) retention capacity, whereas the granitic material showed the lowest retention potential. When high Cr concentrations were added, some saturation of the adsorbent surfaces became apparent, but Cr release remained low. The highest Cr retention was achieved at a very acid pH value, with release progressively increasing as a function of increasing pH. The amendment with 12 t ha −1 mussel shell did not cause marked changes in Cr(VI) retention. Sorption data were satisfactory adjusted to the Freundlich model. Regarding Cr(VI) fractionation, the soluble fraction (weakly bound) was dominant in mussel shell and in the unamended and amended granitic material, whereas more stable fractions dominated in the pyritic material (residual fraction) and in the forest soil (oxidizable fraction). In conclusion, the pyritic material presented the highest Cr(VI) retention capacity, while the retention was low and weak on the granitic material; mussel shell was not characterized by a marked Cr(VI) retention potential, and it did not cause remarkable increase in Cr(VI) retention when used to amend the granitic material or the forest soil.

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Section: Sorptionmentioning

confidence: 83%

Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration

et al. 2015

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“…Both metals [i.e., Cu(II) and Zn(II)] were removed faster by the RY sample than any of the others, confirming the significant role of chemisorption as a removal mechanism for zinc, as well as for copper. In the carbonaceous clay (RS), metal binding was lower at the beginning of the experiment, probably because of the surface interaction (physisorption) combined with slow dissolution of carbonate minerals that usually constitutes the first step of metal removal by carbonates (Sanchez and Ayuso 2002;Aziz et al 2008;Sdiri et al 2012a). However, the difference in removal rates between the RS and RY samples gradually diminished with contact time, and the effects of carbonates was clearly shone after 60 min (Fig.…”

Section: Effect Of Contact Timementioning

confidence: 99%

Adsorption of copper and zinc onto natural clay in single and binary systems

Sdiri

Higashi

Jamoussi³

2013

Int. J. Environ. Sci. Technol.

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Calcareous and smectitic clay samples from the Coniacian-Lower Campanian system, Tunisia, were used as adsorbents for the removal of copper and zinc from aqueous solutions in single and binary systems. Calcareous clay sample was treated with acetic acid to obtain carbonate-free sample that was also used for metals removal. The adsorption of metal ions onto natural clay was tested in a batch method by mixing 1 g/L of each sample with a metal ion solution of zinc (300 lmol/L) and/or copper 600 lmol/L under the operating pH of 6, and agitation speed of 200 rpm within the equilibrium time of 60 min at 25°C for single and binary systems. Our results showed that natural clay samples were mainly composed of silica, alumina, iron, and magnesium oxides. Adsorption data showed that the studied clay samples removed substantial amounts of heavy metals in single and mixed systems. Initial solution pH and carbonates contents enhanced the removal capacities of the studied clay samples, confirming their strong influencing effects. Thermodynamic parameters indicated an endothermic adsorption for metals removal by calcareous clay, but exothermic process for the smectitic sample. These results suggest that the Late Cretaceous clays, Tunisia, can be effectively used as natural adsorbents for the removal of toxic heavy metals in aqueous systems.

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“…It can also increase the concentration of heavy metal ions, such as cadmium (Cd), lead (Pb), zinc (Zn), nickel (Ni), copper (Cu) and chromium (VI) in water resources (Aziz et al 2008). The toxic nature of heavy metals has caused serious health problems for human, and they can accumulate in the environment (Rahmani et al 2010).…”

Section: Introductionmentioning

confidence: 99%

A novel method for synthesis of nano-γ-Al2O3: study of adsorption behavior of chromium, nickel, cadmium and lead ions

Poursani

Nilchi²,

Hassani

et al. 2015

Int. J. Environ. Sci. Technol.

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Nano-c-Al 2 O 3 adsorbent was synthesized by the novel sol-gel method. The adsorbent was characterized by transmission electron microscope, Fourier transform infrared and X-ray powder diffraction. The effects of several variables such as, adsorbent weight, pH and contact time on adsorption of chromium (Cr 6? ), nickel (Ni 2? ), cadmium (Cd 2? ) and lead (Pb 2? ) ions were studied in batch experiments. The results showed that the synthesized nano-c-Al 2 O 3 had a good capacity to adsorb Cr and Pb. The kinetic data were described with pseudo-first-and pseudo-second-order models. Three isotherm models, namely Freundlich, Langmuir and Tempkin, were used for analysis of equilibrium data, and results showed that Langmuir and Freundlich models were suitable for describing the equilibrium data of Cr

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Heavy metals (Cd, Pb, Zn, Ni, Cu and Cr(III)) removal from water in Malaysia: Post treatment by high quality limestone

Cited by 433 publications

References 28 publications

Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration

Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration

Adsorption of copper and zinc onto natural clay in single and binary systems

A novel method for synthesis of nano-γ-Al2O3: study of adsorption behavior of chromium, nickel, cadmium and lead ions

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