Zeolite Curing Process Of Sediment Movement,Transformation Mechanism Of Inorganic Phosphorus

Rapid economic growth has put tremendous pressures on the environment.Eutrophication is the most important threat faced by the domestic and internationalwater system when water is eutrophication, means that the deterioration of waterquality, which led to the deterioration of the circulation of the entire aquaticecosystems, or even a direct threat to human health. To2010, released by the Ministryof the State Environmental Protection State of the Environment Bulletin: detected in2010,26major lakes (reservoirs), the inferior five lakes and reservoirs up to10majorpollution indicators were total nitrogen and total phosphorus. Be seen in the variouspollutants in our natural water bodies, phosphorus pollution has came out on top.Changsha University of Science and Technology campus artificial landscapewater-Lake cloud shadow, Changsha University of Water and Sediment Sciences KeyLaboratory of relying on to carry out static simulations in the laboratory. Use of zeolitein situ capping technology, and its concentration of inorganic forms of phosphorus inthe sediment, different factors (temperature, light, pH, and zeolite particle size,dissolved oxygen) transport and transformation of inorganic forms of phosphorus inthe sediment impact.In order to investigate the cloud shadow lake bottom mud phosphorusconcentration and its composition, the use of sodium hydroxide melt were detected insediment phosphorus load, while the use of various types of inorganic phosphorus loaddetected in sediments of the Chang-Jackson sequential extraction. After testing, thetotal phosphorus load in the lake bottom mud in the shadows of the clouds in the1200mg/kg to1690mg/kg. Inorganic phosphorus of total phosphorus from40%to60%,including: unstable phosphorus concentration is low, accounting for2%of the totalinorganic Phosphorus; aluminum bound phosphorus (A1-P) accounted for3%; calciumbound phosphorus (Ca-P) accounted for36%; iron bound phosphorus (Fe-P) accountedfor7percent; occluded P (OP) to52%.In order to investigate the influence of inorganic phosphorus in the sediments ofthe zeolite particle size of zeolite in the zeolite in situ capping sediment experimentscuring, the five particle size of zeolite used in this experiment were4orders,8mesh,12mesh,16mesh,20mesh. Continuous culture, using sodium hydroxide melt detectedby sediment phosphorus loading, the results of particle size descending order of 1052mg/kg,1164mg/kg,1267mg/kg,1314mg/kg,1490mg/kg, boiling stone particlesize is smaller the more sediment phosphorus curing, calcium and phosphorus andclosed the main impact of sediment build phosphorus in the presence of the proportion.Proven zeolite in situ capping sediment experiment, light, temperature, pH, inorganicphosphorus in the zeolite solidified sediment, designed controlled trials of light anddark, three different temperatures5°C,15°C,25℃controlled trials, three differentpH control trial of pH=6,7,8in the control group. At the same time, in order to studythe influence of dissolved oxygen in the inorganic phosphorus in the sediment, timedcharge into the simulation of aerobic and anaerobic environment of a certain period oftime oxygen and nitrogen in the mechanism of migration and transformation ofinorganic phosphorus in the environment is detected. Light conditions, curing sedimentTP concentration mean of1510mg/kg dark group of the same conditions, sedimentcuring total phosphorus concentration of1228mg/kg. Mean followed by threedifferent temperature5℃,15℃,25℃the sediment curing total phosphorusconcentration to1178mg/kg,1355mg/kg,1220mg/kg. Different pH=6,7,8sediment curing the total phosphorus concentration in order for the1315,1246mg/kg,1192mg/kg.In the experiment, the COD value of the detection on the overlying water andchlorophyll a values, to determine the COD value of the phosphorus load in thesediment and overlying water overlying water and chlorophyll a values relationship.