A Survey on Removal of Chromium from Aqueous Solutions using Activated Carbon of Almond-Shell
Abstract. Chromium VI is one of the heavy metals and polluting water resources that are making in many industries wastewater such as electroplating, the tanning, dyeing and textile manufacturing, mining and fertilizer industries. Observing the toxic and hazardous properties of the metal, its removal by an effective and environmentally friendly method, is essential . Activated carbon with nano pores is a green technology for separation of poisonous material in environment . The aim of this research is to determine the level of cadmium absorption by activated carbon of almond-shell in concentration of “20 ”, “50” and “100” per part million (ppm) and different insolubility times from “15 to 120” min. Experiments for determining isotherms were assigned discontinuous in different concentrations and different amounts of biological activated carbon (from “0.1 gr to 0.3” gr) and the Chromium with desired PH. Measurement of cadmium performed by atomic absorption device and based on the standards. Observing the research results and the PH regulated on “6”, increase in primary concentration of Chromium resulted in increasing of absorption level and also by elapsing the time, absorption level was raised and the maximum absorption on “69/7 %” was happened in time range of “120” min. The results indicate that bio absorber containing sodium alginate containing activated carbon prepared from almond shell is new adsorbent for the removal of cadmium ions from aqueous environments.
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