Wood sawdust has adsorption to heavy metals in wastewater

Is derived from wood processing industry waste, its has a good adsorption of heavy metal in waste water. To waste pine sawdust as an adsorbent, adsorption in electroplating wastewater Zn2 + and CODCr. Research the solution pH, temperature, stirring speed, Zn2 + and CODCr of initial concentration, solid-liquid ratio and other factors on the adsorbent adsorption Zn2 + and CODCr effect. Results show that the pH value of 9, the reaction temperature is 25 ℃, sawdust mass concentration of 30 g/L, Zn2 + and CODCr in electroplating wastewater has high adsorption capacity. Sawdust adsorption efficiency is very high, and under the pH value, color & lt; 5, filtrate colorless transparent, in line with the second category of maximum allowable pollutant discharge standards.

with sawdust and peanut shell as adsorbent, adsorption removal of trivalent chromium in water experiment was carried out. Research the solution pH, initial concentration and temperature of trivalent chromium etc. Of these two kinds of adsorbent to remove trivalent chromium effects. The linear fitting to adsorption curve, determine the corresponding equilibrium adsorption rate; Mass concentration to 1 at the beginning of the trivalent chromium,5,10 and 20 mg/L, the wood chips on the equilibrium adsorption rate were 81%, 68%, 56% and 40%; Peanut shells, followed by 77%, 63%, 53% and 42%.