Removal of reactive dye (BEZAKTIV Red S-MAX) from aqueous solution by adsorption onto activated carbons prepared from date palm rachis and jujube stones

The aim of this study is to use the dry fibers of date palm as low-cost biosorbent for the removal of Cd(II), and Ni(II) ions from aqueous solution by fluidized bed column. The effects of many operating conditions such as superficial velocity, static bed height, and initial concentration on the removal efficiency of metal ions were investigated. FTIR analyses clarified that hydroxyl, amine and carboxyl groups could be very effective for bio-sorption of these heavy metal ions. SEM images showed that dry fibers of date palm have a high porosity and that metal ions can be trapped and sorbed into pores. The results show that a bed height of 6 cm, velocity of 1.1Umf and initial concentration for each heavy metal ions of 50 mg/L are most feasible and give high removal efficiency. The fluidized bed reactor was modeled using ideal plug flow and this model was solved numerically by utilizing the MATLAB software for fitting the measured breakthrough results. The breakthrough curves for metal ions gave the order of bio-sorption capacity as follow: Cd(II)]Ni(II).

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Adsorption of CCl4 from Aqueous Solution on Activated Carbons

Adsorption Science & Technology ◽

10.1260/0263617001493846 ◽

2000 ◽

Vol 18 (9) ◽

pp. 823-837 ◽

Cited By ~ 12

Author(s):

Eugeniusz Milchert ◽

Waldemar Goc ◽

Robert Pelech

Keyword(s):

Aqueous Solution ◽

Activated Carbons

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Use of agricultural waste sugar beet pulp for the removal of Gemazol turquoise blue-G reactive dye from aqueous solution

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2006.02.019 ◽

2006 ◽

Vol 137 (1) ◽

pp. 418-430 ◽

Cited By ~ 83

Author(s):

Zümriye Aksu ◽

I. Alper Isoglu

Keyword(s):

Aqueous Solution ◽

Sugar Beet ◽

Agricultural Waste ◽

Reactive Dye ◽

Sugar Beet Pulp ◽

Beet Pulp

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Removal of Ni (II) from Aqueous Solution by Adsorption onto Activated Carbon Prepared from Lapsi (Choerospondias axillaris) Seed Stone

Journal of the Institute of Engineering ◽

10.3126/jie.v9i1.10680 ◽

2014 ◽

Vol 9 (1) ◽

pp. 166-174 ◽

Cited By ~ 9

Author(s):

Rajeshwar M. Shrestha ◽

Margit Varga ◽

Imre Varga ◽

Amar P. Yadav ◽

Bhadra P. Pokharel ◽

...

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Activated Carbons ◽

Low Cost ◽

Chemical Characterization ◽

Maximum Adsorption Capacity ◽

Adsorption Data ◽

Optimum Ph ◽

Nickel Adsorption

Activated carbons were prepared from Lapsi seed stone by the treatment with H2SO4 and HNO3 for the removal of Ni (II) ions from aqueous solution. Two activated carbon have been prepared from Lapsi seed stones by treating with conc.H2SO4 and a mixture of H2SO4 and HNO3 in the ratio of 1:1 by weight for removal of Ni(II) ions. Chemical characterization of the resultant activated carbons was studied by Fourier Transform Infrared Spectroscopy and Boehm titration which revealed the presence of oxygen containing surface functional groups like carboxyl, lactones and phenols in the carbons. The optimum pH for nickel adsorption is found to be 5. The adsorption data were better fitted with the Langmuir equations than Freundlich adsorption equation to describe the equilibrium isotherms. The maximum adsorption capacity of Ni (II) on the resultant activated carbons was 28.25.8 mg g-1 with H2SO4 and 69.49 mg g-1 with a mixture of H2SO4 and HNO3. The waste material used in the preparation of the activated carbons is inexpensive and readily available. Hence the carbons prepared from Lapsi seed stones can act as potential low cost adsorbents for the removal of Ni (II) from water. DOI: http://dx.doi.org/10.3126/jie.v9i1.10680Journal of the Institute of Engineering, Vol. 9, No. 1, pp. 166–174

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Comparison of Coal Ash and Activated Carbon for Removal of Humic Acid from Aqueous Solution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.864-867.1509 ◽

2013 ◽

Vol 864-867 ◽

pp. 1509-1512

Author(s):

Xue Mei Zhang ◽

Yan Zhang ◽

Di Fan

Keyword(s):

Aqueous Solution ◽

Humic Acid ◽

Activated Carbons ◽

Removal Rate ◽

Coal Ash ◽

Cost Effective ◽

Solution Ph ◽

Adsorption Behaviors ◽

Calcium Loading ◽

Working Solution

This paper presents the adsorption behaviors of humic acid (HA) on coal ashes and powdered activated carbons (PACs). A bituminous coal, with or without calcium-loading, was used as a feedstock for coal ash preparation. The working solution of HA with a concentration of 20 mg/L was used in all adsorption tests. The results showed that calcium-enriched coal ash (CECA) gave rise to the removal rate of HA as high as 84.05%, much higher than those of raw coal ash (RCA) and PACs. The impacts of solution pH and adsorbent dosage on HA adsorption capacity were also investigated. It was found that lower pH facilitated to the removal of HA from aqueous solution by means of CECA, and the optimal CECA dosage was about 1.0g/L at pH 7.00. The data obtained in this study suggested that calcium-enriched coal ash could be useful and cost-effective in the treatment of wastewaters containing HA-like organic macro-molecules.

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