Hav nyob ntawd! Raws li tus neeg muag khoom dodecylphenol, Kuv tau txais ntau cov lus nug tsis ntev los no txog cov txheej txheem degradation ntawm dodecylphenol. Yog li, kuv xav tias kuv yuav siv sijhawm ib pliag los qhia qhov kuv paub thiab rhuav tshem nws hauv txoj hauv kev uas yooj yim to taub.
Ua ntej tshaj, cia peb tham txog dab tsi dodecylphenol yog. Nws yog ib hom alkylphenol, uas yog cov tshuaj lom neeg uas muaj lub nplhaib phenol nrog ib pawg alkyl txuas rau nws. Nyob rau hauv cov ntaub ntawv ntawm dodecylphenol, pawg alkyl yog ib tug dodecyl saw, uas yog ib tug 12-carbon saw. Dodecylphenol feem ntau yog siv rau ntau yam kev lag luam, suav nrog kev tsim cov tshuaj detergents, emulsifiers, thiab antioxidants.
Tam sim no, cia peb nkag mus rau hauv cov txheej txheem degradation. Muaj ntau txoj hauv kev uas dodecylphenol tuaj yeem degrade, thiab nws feem ntau nyob ntawm qhov chaw ib puag ncig nws raug.
1. Biodegradation
Biodegradation yog ib txoj hauv kev tseem ceeb tshaj plaws uas dodecylphenol tuaj yeem tawg hauv ib puag ncig. Cov kab mob, xws li cov kab mob thiab cov fungi, ua lub luag haujlwm tseem ceeb hauv cov txheej txheem no. Cov kab mob no muaj peev xwm siv dodecylphenol ua cov pa roj carbon thiab lub zog. Lawv rhuav tshem cov dodecylphenol molecule los ntawm ntau cov tshuaj tiv thaiv enzymatic.
Piv txwv li, qee cov kab mob tuaj yeem oxidize alkyl saw ntawm dodecylphenol, maj mam txo nws. Nyob rau tib lub sij hawm, cov molecule yog tawg mus rau hauv me me thiab yooj yim degradable tebchaw. Tus nqi ntawm biodegradation tuaj yeem sib txawv raws li qhov kub thiab txias, pH, thiab muaj cov as-ham. Feem ntau, sov sov thiab nruab nrab pH tej yam kev mob yuav nyiam sai biodegradation.
2. Photodegradation
Photodegradation tshwm sim thaum dodecylphenol raug tshav ntuj, tshwj xeeb tshaj yog ultraviolet (UV) hluav taws xob. UV lub teeb muaj lub zog txaus los rhuav tshem cov tshuaj lom neeg hauv dodecylphenol molecule. Thaum qhov no tshwm sim, cov molecule tuaj yeem raug ntau yam kev cuam tshuam, xws li oxidation thiab cleavage.
Cov tshuaj tiv thaiv oxidation tuaj yeem qhia cov pa atoms rau hauv cov molecule, hloov nws cov khoom siv tshuaj. Cleavage cov tshuaj tiv thaiv tuaj yeem rhuav tshem cov molecule rau hauv cov khoom me me. Cov khoom ntawm photodegradation tuaj yeem sib txawv ntawm biodegradation. Photodegradation feem ntau yuav tshwm sim nyob rau hauv cov dej saum npoo av thiab nyob rau hauv cov huab cua uas muaj ncaj qha raug tshav ntuj.
3. Tshuaj Oxidation
Tshuaj oxidation yog lwm txoj kev degradation. Hauv ib puag ncig, muaj ntau yam oxidizing cov neeg ua haujlwm xws li ozone, hydrogen peroxide, thiab qee cov hlau ions. Cov tshuaj oxidizing no tuaj yeem hnov mob nrog dodecylphenol thiab rhuav tshem nws.
Piv txwv li, ozone yog lub zog oxidant. Thaum ozone los rau hauv kev sib cuag nrog dodecylphenol, nws tuaj yeem hnov mob nrog ob daim ntawv cog lus hauv lub nplhaib phenol thiab cov saw alkyl. Qhov no ua rau kev tsim cov khoom oxidized, uas feem ntau ntau dua polar thiab dej - soluble dua li qub dodecylphenol molecule. Cov khoom lag luam ntau dua no feem ntau yooj yim degraded ntxiv los yog tshem tawm ntawm ib puag ncig.
4. Hydrolysis
Hydrolysis yog cov tshuaj tiv thaiv uas cov dej molecules tawg cov tshuaj lom neeg hauv dodecylphenol. Txawm hais tias dodecylphenol kuj tseem tiv taus hydrolysis nyob rau hauv ib puag ncig ib puag ncig, qee yam tuaj yeem nce tus nqi ntawm hydrolysis. Piv txwv li, nyob rau hauv lub xub ntiag ntawm muaj zog acids los yog hauv paus, cov tshuaj tiv thaiv hydrolysis tuaj yeem ua kom nrawm.
Nyob rau hauv acidic tej yam kev mob, phenol pab pawg neeg nyob rau hauv dodecylphenol tuaj yeem protonated, ua rau cov molecule muaj kev cuam tshuam rau dej. Hauv cov xwm txheej yooj yim, hydroxide ions tuaj yeem hnov mob nrog cov molecule, ua rau muaj kev sib cais ntawm qee cov ntawv cog lus. Txawm li cas los xij, hydrolysis feem ntau yog qeeb qeeb qeeb piv rau biodegradation thiab photodegradation hauv ntau qhov chaw ntuj.
Tam sim no, vim li cas nws tseem ceeb kom nkag siab txog cov txheej txheem degradation no? Zoo, los ntawm tus neeg muag khoom qhov kev xav, nws pab peb kom nkag siab zoo dua ntawm ib puag ncig txoj hmoo ntawm dodecylphenol. Qhov kev paub no yog qhov tseem ceeb rau kev ua kom ntseeg tau tias peb cov khoom siv hauv txoj hauv kev uas txo lawv cov kev cuam tshuam ib puag ncig.
Rau peb cov neeg siv khoom, kev nkag siab txog cov txheej txheem degradation kuj tseem muaj txiaj ntsig. Yog tias koj siv dodecylphenol hauv ib daim ntawv thov, koj yuav tsum paub tias nws yuav coj li cas hauv ib puag ncig tom qab siv. Qhov no tuaj yeem pab koj txiav txim siab paub ntau ntxiv txog kev tswj cov khib nyiab thiab kev tiv thaiv ib puag ncig.
Yog tias koj xav paub ntau ntxiv txog kev kuaj degradation ntawm dodecylphenol, koj tuaj yeem tshawb xyuas qhov txuas no:4-testsdfgsdfg ua. Nws muab qee qhov hauv - cov ntaub ntawv tob txog cov kev sim thiab cov txiaj ntsig ntsig txog dodecylphenol degradation.
Raws li tus neeg muag khoom dodecylphenol, peb tau cog lus tias yuav muab siab - cov khoom zoo thiab tseem xyuas kom meej tias lawv tau siv rau hauv ib puag ncig lub luag haujlwm. Yog tias koj nyob hauv kev ua lag luam rau dodecylphenol lossis muaj lus nug txog nws cov khoom, kev siv, lossis cov txheej txheem degradation, tsis txhob yig mus cuag. Peb xav kom muaj kev sib tham nrog koj thiab saib seb peb tuaj yeem ua tau raws li koj xav tau. Txawm hais tias koj yog ib lub chaw tsim khoom me me - lossis lub tuam txhab kev lag luam loj, peb nyob ntawm no los txhawb koj.
Cov ntaub ntawv
- Schwarzenbach, RP, Gschwend, PM, & Imboden, DM (2003). Environmental Organic Chemistry. Wiley - Interscience.
- Atlas, RM, & Bartha, R. (1998). Microbial Ecology: Cov ntsiab lus thiab kev siv. Benjamin Cummings.
- Pignatello, JJ, Oliveros, E., & MacKay, A. (2006). Advanced Oxidation Processes rau Organic Contaminant Destruction Raws li Fenton Reaction thiab Related Chemistry. Kev Ntsuam Xyuas Tseem Ceeb hauv Ib puag ncig Kev Tshawb Fawb thiab Tshuab, 36(1), 1 - 84.