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The preparation process of waste banana stem adsorbent and the conditions of removing Cr were studied. The experiment results showed that the saturated adsorption capacity of banana stem adsorbent with phosphoric acid reached 5.84mg/g, over 95% of Cr(VI) and 70% of total Cr can be removed from water with banana stem adsorbent at 20~30 °C and pH=2~3. When used for cleaning model electroplating wastewater, it was found that the removal effect of Cr with banana stem adsorbent was apparently higher than the commercial activated carbon. The concentration of heavy metals can meet the emission standard of electroplating wastewater after treated with banana stem adsorbent.

Adsorption and Separation of Chromium from Electroplating wastewater with Banana Stem Adsorbent