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絮凝-吸附法处理气田含汞污水的实验研究.docx

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絮凝-吸附法处理气田含汞污水的实验研究 Title:ExperimentalResearchontheTreatmentofMercury-ContaminatedWastewaterfromGasFieldsusingCoagulation-AdsorptionMethod Introduction: Mercurycontaminationinwastewaterisasignificantenvironmentalconcern,particularlyinthegasindustrywhereitiscommonlyfound.Wastewatergeneratedingasfieldscontainshighlevelsofmercury,whichcanbedetrimentaltohumanhealthandtheenvironmentifnotproperlytreated.Therefore,theobjectiveofthisstudyistoinvestigatetheefficacyofthecoagulation-adsorptionmethodinremovingmercuryfromwastewatergeneratedingasfields. Methods: 1.Wastewatersampling:Wastewatersampleswerecollectedfromgasfieldsandanalyzedformercuryconcentrationusingatomicabsorptionspectrometry. 2.Coagulantselection:Differentcoagulantssuchasferricchloride,aluminumsulphate,andpolyaluminumchlorideweretestedtodeterminetheoptimalcoagulantformercuryremoval. 3.Coagulationexperiments:Coagulationexperimentswereconductedbyvaryingthedosageofthechosencoagulantandthereactiontime. 4.Adsorptionexperiments:Thecoagulatedsamplesweresubjectedtoadsorptionexperimentsusingactivatedcarbon,zeolite,andactivatedaluminaasadsorbents.Theadsorptioncapacityandequilibriumtimeweredetermined. 5.Characterization:Thetreatedwastewatersampleswerecharacterizedusingscanningelectronmicroscopy(SEM)andenergy-dispersiveX-rayspectroscopy(EDX)toanalyzethemorphologyandchemicalcompositionofthemercury-removedprecipitates. 6.Statisticalanalysis:Thedataobtainedfromtheexperimentswereanalyzedusingstatisticalsoftwaretodeterminethesignificanceoftheexperimentalresults. ResultsandDiscussion: 1.Coagulantselection:Amongthecoagulantstested,polyaluminumchlorideshowedthehighestmercuryremovalefficiency. 2.Coagulationexperiments:Theoptimumcoagulantdosageandreactiontimeforwastewatertreatmentweredeterminedtobexmg/Landyminutes,respectively,withmercuryremovalefficiencyreachingz%. 3.Adsorptionexperiments:Theadsorbentwiththehighestmercuryremovalcapacityandshortestequilibriumtimewasidentified. 4.Characterization:SEMandEDXanalysisrevealedtheformationof