Removal of Chromium Cr(Vi) of Tanning Effluent with Activated Carbon from Tannery Solid Wastes
Mehdi Louarrat,
Abdoul Ntieche Rahman,
Abdelaziz Bacaoui,
Abdelrani Yaacoubi
Issue:
Volume 6, Issue 6, December 2017
Pages:
103-109
Received:
2 October 2017
Accepted:
20 October 2017
Published:
3 December 2017
Abstract: This study offers an integrated process for treatment and recycling of tannery waste, it has a dual purpose. First the activated carbon (AC) has been prepared from leather shaving (LS) and goat hair (GH) by physical activation. Both the raw material and the prepared activated carbon were analyzed by DTG, TGA, and SEM. The adsorption tests of methylene blue (MB) and iodine onto the raw material and the prepared adsorbent were carried out and it was found that the adsorption capacity of the activated carbon was enhanced by the physical activation. The AC was then characterized by BET surface area and Fourier transform infrared spectroscopy (FTIR). The BET surface area was found to be 491.05 and 242.60 m2/g for ACs prepared from LS and GH respectively and the functional groups on the adsorbent surface were mainly CN, NH, OH, CO and CS. Secondly, the performance of the prepared AC was assessed by adsorption of chrome (VI) from a synthetic solution, and then the chrome (III) present in the tanning effluent. The results revealed a decrease of chromium by 78% and 73% for the activated carbons prepared from (LS) and (GH), respectively.
Abstract: This study offers an integrated process for treatment and recycling of tannery waste, it has a dual purpose. First the activated carbon (AC) has been prepared from leather shaving (LS) and goat hair (GH) by physical activation. Both the raw material and the prepared activated carbon were analyzed by DTG, TGA, and SEM. The adsorption tests of methyl...
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A Study of Gamma Unfolding for PB, HC Single Shields and Multilayers Containing PB Shield
M. S. Hossain,
S. M. A. Islam,
M. Asaduzzaman,
M. A. Zaman
Issue:
Volume 6, Issue 6, December 2017
Pages:
110-118
Received:
29 December 2016
Accepted:
10 April 2017
Published:
15 January 2018
Abstract: The gamma ray spectrum obtained from a 3.7 × 104 Bq 252Cf source after passing through different shielding materials at different thicknesses and different arrangements were detected with a NaI(Tl) detector was fed to a computerized MCA to have a spectrum. This was then stored and subsequently unfolded. The unfolded dose spectra of the fission gamma ray spectrum of the 252Cf source were also measured for some specific shield thicknesses for all the shielding arrangements studied. Theoretical calculations have been performed to study the characteristics of the above mentioned shielding setups by using the three dimensional Monte Carlo computer code MCNP for fission gamma rays. These are then compared with the experimentally obtained values. The agreement is quite satisfactory. Gamma ray fluxes and corresponding dose values have also been calculated. The purpose of the investigation was to determine the effectiveness of the materials and their multilayers as the gamma ray shielding. It has been found that the materials (single layer and multilayer) studied are very effective as the shield for gamma rays.
Abstract: The gamma ray spectrum obtained from a 3.7 × 104 Bq 252Cf source after passing through different shielding materials at different thicknesses and different arrangements were detected with a NaI(Tl) detector was fed to a computerized MCA to have a spectrum. This was then stored and subsequently unfolded. The unfolded dose spectra of the fission gamm...
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