Removal of Cr(III) from tannery wastewater by adsorption onto bentonite clay

Tahir, S.S.; Ullah, Shafqat

doi:10.1016/j.seppur.2006.08.008

Cited by 149 publications

(101 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This paper deals with the structural and surface characterization of composite materials prepared by magnetic modification of the natural clay and their application as potential adsorbents of heavy metal cations. 4 (Ca 0.42 Mg 0.04 Na 0.01 K 0.01 ), originated from the Slovak deposit Jelšový potok [26]. The composite materials were prepared by the method of precipitation of the iron oxide on the bentonite surface from the solution of FeSO 4 .7H 2 O and FeCl 3 .6H 2 O (with ratio of Fe 3+ /Fe 2+ = 2) in acidic condition by continuous stirring for 0.5 h in the nitrogen atmosphere at the ambient temperature [27].…”

Section: Introductionmentioning

confidence: 99%

“…4 (Ca 0.42 Mg 0.04 Na 0.01 K 0.01 ), originated from the Slovak deposit Jelšový potok [26]. The composite materials were prepared by the method of precipitation of the iron oxide on the bentonite surface from the solution of FeSO 4 .7H 2 O and FeCl 3 .6H 2 O (with ratio of Fe 3+ /Fe 2+ = 2) in acidic condition by continuous stirring for 0.5 h in the nitrogen atmosphere at the ambient temperature [27]. The bentonite was mixed into the solution of ferrous and ferric salts prior to the reaction with NH 4 OH and its amount was adjusted to obtain the bentonite/iron oxide weight ratios 2:1 and 4:1 (denoted BM1 and BM2 respectively).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

Danková¹,

Fedorová²,

Bekényiová³

2017

AFST

View full text Add to dashboard Cite

The natural clay bentonite (B) as adsorbent of lead cations was studied. To enhance its adsorption capacity, the coating by iron oxide particles, in two selected weight ratios: 2:1 (BM1) and 4:1(BM2), was used. The changes of the textural and surface parameters after the modification were studied by the low temperature nitrogen adsorption, XRD and SEM method, Mössbauer spectroscopy. The Pb(II) adsorption experiments were studied under the different conditions, such as pH of the model solutions, contact time and initial metal ion concentration. Higher adsorption rates of BM1 and BM2 samples were observed for lower initial metal ion concentrations.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

Danková¹,

Fedorová²,

Bekényiová³

2017

AFST

View full text Add to dashboard Cite

show abstract

“…Features of its structure create the possibility of sorption of heavy metals on the external surface of the particles and in the interlayer spacing of the structural layers with substitution of the appropriate ion-exchange positions (Sultanbayeva et al, 2013). It has been found beneficial for pollution control applications (Tahir and Naseem, 2007). Zeolite also has a high adsorption activity and typical molecular sieve properties.…”

Section: +mentioning

confidence: 99%

“…Clay minerals, such as montmorillonite, bentonite, attapulgite, vermiculite, illite, sericite and kaolinite have been used as adsorbents for metals (Pawar et al, 2016), toxins and waste material (Tahir and Naseem, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Their structure usually contains a tetrahedral silicon oxide layer with some silicon atoms replaced with trivalent cations, sandwiched between two octahedral aluminium oxide layers with some aluminum atoms replaced with divalent cations. Therefore, it is expected that either SiO 2 or Al 2 O 3 present in the adsorbent or their combined influence are likely to be responsible for the adsorption of metal ions (Tahir and Naseem, 2007) as their negative charge (generated by isomorphous substitution of Si 4+ by Al…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Water Filter Fabrication from a Mixture of KMnO<sub>4</sub> Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe<sup>3+</sup>Removal and Water Hardness Treatment

Thongdee¹,

Parun²,

Benjatitmongkhon³

et al. 2017

American Journal of Applied Sciences

View full text Add to dashboard Cite

A water filter was fabricated from a mixture of KMnO 4 modified kapok carbon fiber, zeolite, bentonite and kaolinite clay for Fe 3+ removal and water hardness treatment. The effects of amount of KMnO 4 modified kapok carbon fiber (30-60 wt%), zeolite (20-40 wt%) and sintering temperature (500-700°C) on the properties of sintered products were evaluated. The best of sintered products were tested for treatment of solutions with 5 mg L −1 Fe 3+ and 40-200 mg L −1 total water hardness. The results show that the physical properties of the sintered products were affected by the contents of KMnO 4 modified kapok carbon fiber and sintering temperature. The linear drying shrinkages of the mixture of raw materials increase with increasing content of modified kapok carbon fiber amounts due to the effect of water amount used for mixing process. Furthermore, firing shrinkages of sintered products increased with increasing sintering temperature for the same ratio of raw materials. Finally, the firing shrinkages and density of sintered products decrease with increasing content of the modified kapok carbon fiber at constant sintering temperature. It was shown that the sintered product made with 40 wt% of KMnO 4 modified kapok carbon fiber and sintered at 600°C is suitable for filter fabrication. The KMnO 4 modified kapok carbon fiber filter could adsorb 5-6% more Fe 3+ at equilibrium than filter made with kapok carbon fiber. The Fe 3+ was removed by adsorption and precipitation processes. The Fe 3+ adsorption process of modified kapok carbon fiber filter was fitted to the Langmuir model with maximum adsorption capacity of 53.76 mg g −1 . For hardness removal, the Ca for Mg 2+ and 28.1-123.5 mg g −1 for HCO 3¯, respectively.

show abstract

Synthesis of a novolac‐based 3‐aminopropylsiloxane resin and its application for the removal of Cu²⁺, Cr³⁺, and Ni²⁺ from electroplating wastewater

Abou‐El‐Sherbini

Nour

Soliman

et al. 2014

J of Applied Polymer Sci

View full text Add to dashboard Cite

Novolac resin was modified with 3-aminopropyltrimthoxysilane to obtain phenol-formaldehyde-aminopropylsiloxane resin (PF-APS). Fourier transformation infra-red spectra, thermogravimetric analysis, elemental analysis, and pH-metric titration were used to characterize PF-APS. Its chemical formula was suggested to be C 14 H 12.49 N 0.1 O 2 Si 0.1 . The resin shows high experimental metal ions uptake capacity within short time of equilibration. The metal capacity was determined by atomic absorption spectrometry to be 0.

show abstract

Removal of Cr(III) from tannery wastewater by adsorption onto bentonite clay

Cited by 149 publications

References 30 publications

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

Water Filter Fabrication from a Mixture of KMnO<sub>4</sub> Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe<sup>3+</sup>Removal and Water Hardness Treatment

Synthesis of a novolac‐based 3‐aminopropylsiloxane resin and its application for the removal of Cu²⁺, Cr³⁺, and Ni²⁺ from electroplating wastewater

Contact Info

Product

Resources

About

Removal of Cr(III) from tannery wastewater by adsorption onto bentonite clay

Cited by 149 publications

References 30 publications

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

BENTONITE/IRON OXIDE MAGNETIC COMPOSITES: CHARACTERIZATION AND APPLICATION AS Pb(II) ADSORBENTS

Water Filter Fabrication from a Mixture of KMnO<sub>4</sub> Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe<sup>3+</sup>Removal and Water Hardness Treatment

Synthesis of a novolac‐based 3‐aminopropylsiloxane resin and its application for the removal of Cu2+, Cr3+, and Ni2+ from electroplating wastewater

Contact Info

Product

Resources

About

Synthesis of a novolac‐based 3‐aminopropylsiloxane resin and its application for the removal of Cu²⁺, Cr³⁺, and Ni²⁺ from electroplating wastewater