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Articles by M.A. Goni
Total Records ( 3 ) for M.A. Goni
  M.A. Halim , S.A.M. Waliul Hoque , M.K. Hossain , A.H.M. Saadat , M.A. Goni and M. Saiful Islam
  Laterite soil samples were studied to monitor their efficiency in removing arsenic from contaminated water by adsorption filtration method in laboratory condition. Prepared 10 mg L-1 solution of As3+/As5+ was passed through the six soil samples. At room temperature, a batch of three different samples adsorbs 1010, 925 and 932.5 mg kg-1 of arsenic and their removal efficiency were found to be 58.74, 65.32 and 65.39%, respectively. At 100 °C temperature, the three specimens studied show the adsorptivity of 54.40, 63.47 and 58.69%, while the respective amount adsorbed was calculated 848, 694 and 760 mg kg-1, respectively. Studied IR spectra of the sample of different temperature gradients revealed that the efficiency of a particular composite is high temperature sensitive and the most important and noticeable performance of soil samples is observed when the samples are treated at room temperature, this is the optimum temperature for these soil samples. Above this temperature the efficiency decline gradually.
  M.S. Rana , M.A. Halim , S. Safiullah , M. Mamun Mollah , M.S. Azam , M.A. Goni , M. Kamal Hossain and M.M. Rana
  The study focuses on potential of using crab shell chitosan as a low-cost biosorbent, for heavy metals removal from aqueous solutions in an adsorption filtration system. Chitosan was synthesized from chitin by the treatment of strong alkali solution under reflux condition and chitin was extracted from crab shell followed by decalcification and deproteinization treatment. Spectrometric (AA and UV) method was employed to detect the heavy metals concentration. Prepared 10 mg L-1 solutions of zinc, lead, cadmium, cobalt, nickel, chromium, manganese and iron were passed through the 5 g of chitosan separately and it was found that chitosan was excellent adsorbent in removing mentioned heavy metals. The removal efficiency of chitosan was in the following order Mn>Cd>Zn>Co>Ni>Fe>Pb>Cr. The result also showed that the time required for 100% breakthrough of prepared chitosan for Mn and Zn was approximately 27 and 23 h whereas it was only 16 h for both Cr and Pb, respectively. The research revealed that prepared chitosan showed better removal performance for Mn, Cd, Zn whereas the removal efficiency was satisfactory for Co, Ni and Fe but it exhibited relatively least performance for Pb and Cr.
  M.A. Halim , S. Safiullah , M. S. Rana and M.A. Goni
  Iron based Titanium dioxide composites were prepared from beach sand of Cox`s Bazaar, Bangladesh, to monitor their efficiency in removing arsenic from contaminated water by column adsorption filtration method in laboratory condition. It is observed that the prepared Iron based Titanium dioxide composite (ITDO-1 and ITDO-2) can do remove 100% both states of arsenic from the prepared 10 mg L-1 arsenic solution up to the breakthrough volume (ITDO-1 at 3.1 L and ITDO-2 at 1.9 L, for 4 g of column material) in each case. Adsorbed arsenic is amounted to 4871 mg kg-1 of composite ITDO-1 and removal efficiency is found 72.46% up to the saturation volume (7.35 L) while the corresponding figure for composite ITDO-2 is 6708 mg kg-1 of material with an efficiency of 62.92% up to saturation volume (7.5 L). This study also revealed that the residue (ITDO-3) left after the prepared ITDO-1 and ITDO-2, exhibited least performance on removing arsenic.
 
 
 
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