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Articles by S.A.M. Waliul Hoque
Total Records ( 2 ) for S.A.M. Waliul Hoque
  M.S. Rana , M.A. Halim , S.A.M. Waliul Hoque , Kamrul Hasan and M.K. Hossain
  The present research investigated the arsenic removal performance of prepared and commercial crab shell chitosan by adsorption filtration method. The ability of chitosan to remove arsenic from prepared arsenic contaminated solution was examined by Atomic Absorption Spectrometry (AAS). It is found that the saturation volume of prepared chitosan for l0 mg L-1 As3+/As5+ solution was 8.55 L and its arsenic removal capacity was 6244.2 mg kg-1. For commercial chitosan, the saturation volume for low and high molecular weight chitosan was 1.3 and 0.45 L and their arsenic removal capacity were 461.8 and 149.5 mg kg-1, respectively. The FT-IR study also confirmed that prepared chitosan’s arsenic removal capacity was higher than that of low and high molecular weight commercial chitosan due to the free amino group.
  M.M. Islam , M.A. Halim , S. Safiullah , S.A.M. Waliul Hoque and M. Saiful Islam
  The present research was carried out with eight specimens of sludge from Apex Weaving and Finishing Mills Ltd. Gazipur, Bangladesh, to determine the concentration of heavy metals (Pb, Cd, Zn, Cu, Cr, Fe and Mn) in the sludge samples and an assessment was made with the heavy metal content in agricultural soil. Atomic Absorption Spectrometry (AAS) method was employed for the analysis of Pb, Cd, Cr, Zn, Cu and UV-Spectrophotometric method was used for Fe and Mn, respectively. The mean concentration of lead (Pb), cadmium (Cd), chromium (Cr) was 79.13, 6.27, 4.35 mg kg-1 and for zinc (Zn), copper (Cu), iron (Fe) and manganese (Mn) it was 7.90, 1.34, 195.2 and 3.97 g kg-1, respectively. All the heavy metal concentrations except chromium in the sludge samples were higher than that of in agricultural soil. In addition, the study concluded that pre-treatment process for reducing the amount of heavy metal is mandatory before the sludge can be used as a soil conditioner or fertilizer in the agricultural soil.
 
 
 
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