Chromium removal from tannery wastewater using Syzygium cumini bark adsorbent
2019
Hashem, Md. A. | Momen, Md. A. | Ḥăsăn, M. | Nur-A-Tomal, Md. S. | Sheikh, Md. H. R.
In this study, chromium removal efficiency of the prepared adsorbent from the Syzygium cumini bark is stated. After collecting, Syzygium cumini bark was sun-dried, burnt, grinded and sieved on 80 mesh. The prepared adsorbent was characterized by different techniques such as Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and energy-dispersive X-ray spectrometry (EDX). The effectiveness of adsorbent for the chromium removal efficiency was examined investigating different parameters, e.g., adsorbent dose, contact time, and relative pH. In batch-wise treatment process at optimized conditions, 75 mL chromium-containing wastewater was mixed with 3 g adsorbent, stirred for 15 min, settled, and chromium content was measured by the titrimetric method. Chromium content in the raw wastewater and filtrate was 2920.24 and 3.46 mg/L, respectively. The chromium removal efficiency was obtained 99.9%. The reduction in BOD, COD, and chloride was 97, 94, and 56%, respectively. The use of low-cost indigenous adsorbent could be an option for the chromium removal from tannery wastewater.
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