Study On Microwave Modified Barks And Containing Carbon Absorbent Remove Cr(Ⅵ) In Water

The chromic waste water main stem from the chromic ore processing, metalsurface dealing with, leather dealing with, printing and so on. Chromium in wastewater mainly exist by Cr (VI) and Cr (III) two kind of price attitude. Cr(VI) toxicityrelatively strong of them, and 100 times louder than Cr(III). At present in the industryuses oxidation-reduction method, ion exchange handle law, deposition method,activated charcoal adsorption method ,etc. technical treatment include Cr (VI) thewaste water, but these methods costs are generally higher. In recent years,environment engineering more and more took the inexpensive highly effectiveabsorbent to adsorb the density lower six price chromium waste water . Forest loggingand wood processing industries have a lot of bark every year, the bark is burned ornaturally degraded. The both have wasted the resources, and have polluted theenvironment. The microwave radiation technology took an emerging environmentalprotection technology, has highly effective,fast simple operation, save energy,cannot bring two times of pollutant in the treating processes. At present microwaveradiation technology in environment application mainly in sewage treatment and inmodified material.This paper take the bark as a raw material, uses the microwave technology, themicrowave radiation -medicament activation bark prepare one kind ofabsorbent ,which can absorbed six price chromium in water.This paper inspected the influence absorbent performance factor: The materialcompares (chemical agent quality / bark quality) and the chemical agent solutionconcentration, as well as affects six price chromium water leakage anotherfactor—adsorption time. The results showed: R is 1.20, the zinc chloride density is35%, and handle 50mL waste water, which six price chromium density is 50mg/mL,After adsorbs 3h, the adsorption achieve equilibrium, the water leakage densityreduces to 0.95mg/L, and the removal efficiency appears to be a high 98.36%.This experiment also has explored microscopic structure and the reactionmechanism of microwave exposure-medicament activation bark. The microwaveexposure-medicament activation bark obtains absorbent memory in massive holes,crevice structure relatively complete, the porosity distribution is even.The microwave modified bark takes the absorbent, and uses in processingcontain six price chromium waste water. This provided one kind of new adsorptionmaterial for six price chromium waste water. This absorbent is easy to control inmanufacture craft, does not special technology, then reduced six price chromiumwaste water processing cost greatly. This technology has the strong applicationprospect.