The Ferrate Site Preparation Of New Technology And Applied Research

Ferrate(VI) is a kind of multi-functional water treatment reagent with high efficiency and good prospect. The novel technology process of on-site generation of ferrate(VI) is raised as well as the kinetics mechanism of gas-liquid reaction which Cl2 reacts with Fe(OH)3 is discussed. The system analysis of the technology process is accomplished Furthermore,the experimental research on ammunition destruction wastewater, EDTA wastewater containing copper(Ⅱ) ion and hospital effluent treated by Na2FeO4 which produced from the newly technology process is carried on Some conclusions are drawn below.1.It is proved that (Fe)3+ is the main impurity during the preparation of K2FeO4. High-purityK2FeO4(>99%) can be obtained after centrifugalization and two-stage purification Aimingat solving the problems in the classical titration, 4 pieces of advice are given The precisionand accuracy of analytical method for (FeO4)2- is greatly increased after improvement. Themethod that can remove the disturbance of Fe3+ is found in the spectrophotometry of (FeO4)2- Both (FeO4)2- and ClO- could be determined accurately when the two kinds of ion coexist in the solution.2.The minimum concentration of NaOH which can guarantee production of (FeO4)2- is 5mol/l.This gas-liquid reaction is a typically slow process, and the reaction in the liquid phase isthe rate-controlling step. The rate equation of the total reaction can be described as γ=1.85×10-7CFeCl31.18COH-2.09CCl20.55, activation energy Ea=146.9×103J/mol. Moreover,several efficient ways of producing ferrate(VI) are indicated on the basis of micro- and macro-kinetics analysis about the gas-liquid reaction.3.The experimental apparatus of on-site generation ferrate(VI) sodium which is called"electrolytic both-loop reactor" is designed and manufactured. The factors that influencethe reaction system are investigated. The mathematics model of this reactor can bepesed as r = 1.05 x10'C4C::C2. m bo ds of we4 coocenhatiocowt wh bo - bo ed bo ds mam bo the concenatOf NaOH nd FeCl3 nd wi thae change -- allo, the bo valus has the samwt tw as the ds valUe. m boStagu bo COmpe edpe ror the tectwlogy peS is denat m com-- bo ed orpe-cOntrObo pofor is ads- condderin be tond infor wbo is the edghndmp Of tw pes and ecmp ch as the the ds de m mds are tw m expe of NaOH and FeCl3 is 14 mny l0.0 ghwi ffe ot fority is 6.QAldm ana the occond tw of bo is0.0l5Cm4. The od detw is 6.0Aled in the bfor bobo peess. m tw Ofthe ele trath is 15'v m nd for is 95% the VOltagr is 56%nd the -- Of elecrt mp is 53W ffe enw tw or ds beProcess is un wbo is bo than bo -- ofeq. fordeCOntw Of W. is ed hi cOmpe wh pe fords pe.thelOOPhatha aPPlied in the chgy pe is mere dsnd in ares be A4.m ed that bo sOds Ofee are ed by NW4bo the onsho --are W W the for Of M fore bo 105.0mgh tO 03 witkW dses or l00mat at na 14 in 4s ed bo or wi anows its theboch the for boQuality habo oo .The bo of Npe. cods be-ed 40% wbo we4 nd boet are bo used seCOthe - to EDThwaswi cOntaha Cwt tbe cds of Cer drop bo 52.0ed to 0.'zed whwe thees or700mst at nn l4 in 30 nd m ds mot the We bowtSwtpeteq'W E. colt (Escherichta colt) inbospeW for hom l.05X104 PFUW fowi W to fors tban 3 PUF whwn dses or 10mst at pe 8 in l0 ed m ed ormebo ctads boat lmwt Bota ids meet the ha thetw Stanot bo or bocan be -- aPwied wbo ORP pethe POWe ds is aPthed inbong...