Removal of Some Organic Dyes by Acid-Treated Spent Bleaching Earth

Lee, Chnoong Kheng; Low, Kun She; Gan, Ping

doi:10.1080/09593332008616798

Cited by 123 publications

(58 citation statements)

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“…The wastewaters discharged from dying processes exhibit high BOD, high COD are highly coloured, hot, alkaline and contain high amounts of dissolved solids [2]. The disposal of coloured wastes such as dyes and pigments into receiving waters damages the environment, as they are carcinogenic and toxic to humans and aquatic life [3,4]. Besides the problem of colour, some dye impart non-visibility and can be modified biologically to toxic or carcinogenic compounds.…”

Section: Introductionmentioning

confidence: 99%

Kinetics Study of Methylene Blue Dye Bioadsorption on Baggase

Raghuvanshi¹,

Singh²,

Kaushik³

2004

Appl Ecol Env Res

109

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A Ab bs st tr ra ac ct t. The adsorption potential of agricultural (sugarcane) by-product, the baggase was investigated in batch experiments with two different forms i.e., raw and chemically activated forms, for the removal of Methylene Blue dye, with different parameters like dye concentration, contact time, temperature and adsorbent dose. The removal is better and more effective with chemically activated baggase in comparison to the raw baggase. An average percent removal difference between the two adsorbents of around 18% was achieved under the different conditions in the experiment. The data fit well in the Freundlich isotherm. K Ke ey y w wo or rd ds s:

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Section: Introductionmentioning

confidence: 99%

Kinetics Study of Methylene Blue Dye Bioadsorption on Baggase

Raghuvanshi¹,

Singh²,

Kaushik³

2004

Appl Ecol Env Res

109

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“…21 The proposed two-step process for malachite green removal was studied with low (1.0 mM) and higher (2.0 mM) concentrations of malachite green. The first step was to treat with physical process using five different types of adsorbents (activated carbon, soil, ground shrimp skeleton, ground oyster shell and ground charcoal).…”

Section: Discussionmentioning

confidence: 99%

Untitled

Nimrat¹,

Sawangchit²,

Vuthiphandchai³

2004

ScienceAsia

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This work involved the treatment of malachite green, a basic dye, extensively used in industries and aquaculture. A two-step technique associated with physicochemical and biological treatments was established to remove malachite green in terms of color and chemical oxygen demand (COD) reduction by the use of various adsorbents. Activated carbon and soil represented the best adsorbents for removal of the green color of malachite green and COD reduction. The results showed that activated carbon and soil can decolorize the green color of malachite green more efficiently than the use of ground shrimp skeleton, ground oyster shell and ground charcoal. However, all tested adsorbents, except ground shrimp skeleton, could reduce the COD level to similar extents. One millimolar malachite green (1,690 mg/L COD) was passed through activated carbon and soil and then to either aerobic or aerobic denitrifying activated sludge for COD reduction. The results demonstrated that the adsorption of malachite green using activated carbon or soil and treating the filtrate with either aerobic or aerobic denitrifying activated sludge could efficiently decrease the COD level by 77.5% to 86.0%. When a higher concentration of malachite green (2.0 mM) was tested using the same technique, the efficiency for COD reduction improved to 85.8-87.7%. Therefore, the adsorption efficiency with the use of physical and biological systems for COD reduction of malachite green appeared to increase with increasing concentration of the dye.

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“…The band at 2918.13 and 2841.24 cm -1 is due to C-H stretching. The absorption at 1743.33 cm -1 could be C=O (carbonyl) stretch and 1635.39 cm -1 is due to C=C stretching stretching (Lee et al, 2007 shifted because of the C-H stretching. Absorption peak at 1743.33 cm -1 lost intensity and shifted to 1730 cm -1 due to C=O lead absorption.…”

Section: Ftir Analysismentioning

confidence: 99%

“…The band at 2918.18 and 2853.36 cm -1 is due to C-H stretching. The absorption at 1743.18 cm -1 could be C=O (carbonyl) stretch and 1635.79 cm -1 is due to C=C stretching (Lee et al, 2007). The adsorption peaks at 1246.00 and 1017.90 cm -1 can be assigned to C-O group of an acid and an ester, respectively (Sharma and Uma Gode, 2010 .…”

Section: Ftir Analysismentioning

confidence: 99%

“…Figure 1 shows that the absorption at 3337.88 cm -1 in M. oleifera pods is due to OH stretching vibration (Kumar and Tamilarasan, 2013;Zhang et al, 2013;Sivaraj et al, 2001). Vibrations at 2916.32 cm -1 was due to CH stretching and 1732.08 cm -1 could be C=O (carbonyl) stretch (Lee et al, 2007). Vibrations at 1636.72 cm -1 can be ascribed to aromatic C=C bending or NH of an amide; 1238.72 and 1083.3 cm -1 were assigned to C-O group of an acid and an ester, respectively (Sharma and Uma Gode, 2010 .…”

Section: Ftir Analysismentioning

confidence: 99%

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Comparative biosorption of Pb2+ ions from aqueous solution using Moringa oleifera plant parts: Equilibrium, kinetics and thermodynamic studies

Nyoni¹,

Satiya²,

Mukaratirwa‐Muchanyereyi³

et al. 2017

Afr. J. Biotechnol.

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This research article presents a comparative study of the adsorption properties of Moringa oleifera biomass using Pb 2+ ions as test analyte. The investigated parameters which affected the adsorption process were the effect of pH, initial concentration, adsorbent dose, contact time, and temperature. The comparison of adsorption process was evaluated in the pH range of 3 to 8, concentration range from 5 to 20 ppm, temperature varied from 25 to 80°C, variation of contact time from 15 to 80 min, and dose of the adsorbent from 0.3 to 1.2 g. The results obtained showed that a high adsorbent dose is required for high adsorption capacity. The pH of 7 was most effective with temperature set at 25°C and contact time of 60 min. The Temkin, Dubunin-Radushkevich, Langmuir and Freundlich isotherms were applied and fitted well to the data and values of the parameters of these isotherm equations were calculated. The Langmuir isotherm proved to be the overall best isotherm. The adsorbent surface functional groups were identified with Fourier Transform Infrared (FTIR) spectroscopy. The maximum adsorption capacity obtained was 98% for seed, 96% for blended, 94% for pods, and 92% for leaves. Better thermodynamic and kinetic properties were obtained with the seeds and the blended samples. In total, these results indicate that the blended moringa biosobent can be employed as a low-cost biosorbent for the removal of lead ions from water.

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Removal of Some Organic Dyes by Acid-Treated Spent Bleaching Earth

Cited by 123 publications

References 0 publications

Kinetics Study of Methylene Blue Dye Bioadsorption on Baggase

Kinetics Study of Methylene Blue Dye Bioadsorption on Baggase

Untitled

Comparative biosorption of Pb2+ ions from aqueous solution using Moringa oleifera plant parts: Equilibrium, kinetics and thermodynamic studies

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