Chromium-containing Residue Of Solid Waste The Reductant Screening Applications Of Basic Research

The chrome salt produce medium outputly Cr6+ with chrome discard residue imply can dissolve, Cr6+ is a kind of strong oxidizing agent, its toxicity and latent endanger the main performance in order to cause the cancer and induct the gene mutation, and stimulate to the skin and with the result that function of allergy, to the human body liver, the kidney poison, can induct the infant's central nervous system system disease etc..The pollution control of the residue chromium with manage, and the comprehensive exploitation problem of the chrome resources, at all extremely value at home and abroad.According to the pollution characteristic of residue containing chromium, using coal gangue, the straw of eupatorium adenophorum spreng and the dehydrated sludge that comes from waste water treatment plant as reducing agents, this paper study three solid waste deoxidize and detoxification on residue containing chromium under microwave heating.and a sieving of three kinds of detoxification researches.The experimental results show detoxification effects of the straw of eupatorium adenophorum spreng and the dehydrated sludge are better than coal gangue's. This paper also gets good experimental condition for dry microwave detoxification, which is the straw of eupatorium adenophorum spren as reducing agent, the ratio of eupatorium adenophorum spreng with residue containing chromium is 6:4, the microwave's power is 500 w, the temperature is 900℃. This technology condition is not only good for detoxification, but also good for reducing energy consumption, and good for recycling economy development. On the other hand, this paper finds a new way for using waste to treat waste.This paper studies that using concentrated activated sludge produced by municipal waste-water treatment manufactory to purify the materiel of including chromium according to the idea of using waste to treat waste and recycling economy. The results is indicated that the Cr6+ concentration of the filtrate is much lower than "levels of integration letting of waste water" (0.5mg/L) after being purified by activated sludge. The detoxification effect is related with the quality of the materiel of including chromium and treating time etc. This paper also does some research about detoxification principle of activated sludge. The use of activated sludge in reducing chromium slag so that hexavalent chromium into the non-toxic trivalent chromium, detoxify purpose implementation of chromium harmless.