Study On Detoxification Process Of Chromite Ore Processing Residue With Biomass And Technology Research Utilization

chromite ore processing residue (COPR) is using chromite production chromiumcompounds produced in the process of solid waste, because of its containinghexavalent chromium is listed as hazardous solid waste. COPR has strong damage tothe environment, seeking for economic, high efficiency, no secondary pollutiongovernance approach is to treat chromium workers focus. Biomass banana peel as areducing agent for the detoxification of chromium slag, widely raw material source,inexpensive, simple and practical method. Research is divided into two aspects: thebiomass and the comprehensive utilization of chromium residue detoxification.The use of biomass to achieve a banana skin detoxification phase oxidation ofchromium slag, chromium slag was simple and effective treatment. By examining theeffects of various process conditions, the first single-factor test to determine theoptimal process conditions banana skin detoxification phase oxidation of chromiumslag: the reaction temperature is90℃,10%of banana peel dosage, reaction time1.5h,plus the amount of acid is4mol H+/kg-COPR, liquid to solid ratio of3:1. Then theresponse surface optimization experiments through Design Expert software optimizedto get the best process parameters: temperature93℃, dosage3.2g/30g banana peelresidue, reaction time1.8h, plus the amount of acid6mol H+/kg-COPR. Factors thataffect the amount of acid added chromium maximum reduction rate, the greater theamount of acid added, reflecting the better. The process of detoxification underconditions of chromium slag can be used as general industrial solid waste landfill.Preliminary analysis showed that the biomass banana skin detoxification mechanismfor coupling the reduction of chromium slag adsorption mechanism.Through literature research, initially selected tall fescue, bermuda grass andalfalfa three plants as chromium enrichment plants, the post-detoxification treatmentof chromium slag by a certain percentage after mixing with the soil for plantingchromium enrichment plants, preliminary exploration grasses grown in mixed soilconditions and adaptability, as well as examine the impact of detoxification of chromium slag containing soil on plant germination and growth, and for thecultivation of other higher value-added chromium enrichment plants pave the way.By planting tests showed that three plants in tall fescue and bermuda grass showedstrong ability to grow in soil containing chromium slag grow well, the germinationrate much higher than alfalfa, and alfalfa are not accustomed to such soil containingchromium slag high levels of salinity, poor soil conditions. Tall fescue and Bermudagrass germination rates were lower than the respective control group, and with theincreasing incorporation of chromium slag decreases, indicating greater impact on soilpH and chromium content of seed germination. Chlorophyll content of tall fescue ismore than the control group and the other groups, indicating that chromium may beinvolved in the synthesis of chlorophyll, chlorophyll stimulated the growth, growthconditions will be better. Chromium content in plant leaves did not show changesregularly, is the result of soil pH, chromium synergy.