Txhawm rau muab nws yooj yim, txiav txim siab tsuas yog muaj kuab paug thiab tsis quav ntsej lwm yam, kev pov tseg yog qhov zoo rau ib puag ncig. Rau cov hnab yas sib xws, kev kub nyhiab siv zog thiab ua rau muaj kuab paug. Kev cog qoob loo siv lub zog tsawg dua, thiab nrog kev tswj kom zoo, cov pa phem yuav luag tsis tsim nyog. Txawm li cas los xij, thaum qhov chaw pov tseg tsis siv hluav taws xob, nws siv ntau qhov chaw ntawm lwm qhov chaw: av, uas tsis yog tag nrho - cov peev txheej txuas ntxiv. Tshwj xeeb tshaj yog, qhov loj - qhov chaw pov tseg ntawm cov khib nyiab yas inevitably ua paug dej hauv av.
I. Muaj cov hnab yas
Cov khoom tseem ceeb ntawm cov hnab yas yog polyethylene (PE), polyvinyl chloride (PV), polypropylene (PP), thiab polystyrene resin (PS), tag nrho cov no yog cov roj av derivatives. Raws li cov ntaub ntawv los ntawm US Environmental Protection Agency, tsim ib tuj lub hnab yas yuav tsum tau 11 chim roj crude. Kev soj ntsuam los ntawm ib puag ncig lub tuam tsev hauv Nyij Pooj thiab Lub Tebchaws Yelemees qhia tau hais tias tsim 50,000 lub hnab yas yuav tsum muaj 1,000 kilograms ntawm polyethylene. Tam sim no, Tuam Tshoj siv ntau dua 3 billion lub hnab yas txhua hnub, nrog kev siv txhua xyoo ntau dua 1 trillion. Piv txwv tias txhua lub hnab yas hnyav 3 grams, Tuam Tshoj siv 9,000 tons ntawm hnab yas txhua hnub, sib npaug rau 99,000 barrels roj av.
II. Lub hnab yas hlawv
Tam sim no, ib txoj hauv kev loj ntawm kev pov tseg cov hnab yas yog hlawv. Incineration tsim ib yam khoom hu ua dioxin. Nws paub tias qhov kev puas tsuaj loj tshaj plaws ntawm cov tshuaj no yog nws qhov kev hloov pauv tsis tau "peb -fold" toxicity: teratogenicity, carcinogenicity, thiab noob hloov. Nws yog ib qho ntawm cov tshuaj lom endocrine cuam tshuam. Thaum nws nkag mus rau tib neeg lossis tsiaj qus lub cev los ntawm ib puag ncig xov xwm thiab cov khoom noj khoom haus, nws yuav cuam tshuam rau lawv cov kab mob endocrine thiab kev ua me nyuam, cuam tshuam rau kev ciaj sia thiab kev loj hlob ntawm cov xeeb ntxwv.
Dioxin yog cov roj tsis muaj xim thiab tsis muaj ntxhiab- cov tshuaj muaj kuab lom nrog cov tshuaj lom neeg siab heev, 130 npaug ntawm cyanide thiab 900 npaug ntawm arsenic, tau txais nws lub npe "tshuaj lom ntawm lub xyoo pua." Lub Koom Haum Thoob Ntiaj Teb rau Kev Tshawb Fawb Txog Kev Mob Cancer tau muab faib ua pawg 1 carcinogen rau tib neeg. Cov kws paub txog ib puag ncig hais tias dioxins feem ntau muaj nyob hauv cov khoom me me hauv huab cua, av, thiab dej.
III. Kev cog qoob loo ntawm cov hnab yas
Kev pov tseg cov khoom pov tseg tsis yog tsuas yog siv ntau thaj av xwb, tab sis thaj av uas nyob tsis tuaj yeem rov qab los rau lub sijhawm ntev, cuam tshuam rau kev siv av kom ruaj khov. Txij li cov khoom siv yas pov tseg hauv cov khoom pov tseg hauv tsev tsis tuaj yeem degrade hauv 200 xyoo yog tias muaj pov tseg, qhov no ua rau muaj kev kub ntxhov rau thaj av. Tib neeg yuav tsis tsuas yog nyob ib puag ncig ntawm cov khib nyiab hauv peb tiam, tiam sis cov tiam tom ntej kuj yuav poob lawv qhov chaw nyob. tau hais txog ntawm nws qhov chaw.
IV. Kev daws teeb meem
(1) Siv tsawg dua los yog tsis muaj hnab yas hauv lub neej txhua hnub, lossis rov siv dua. Ntau lub tebchaws tau siv txoj cai them nyiaj hnab yas. Cov khw muag khoom loj thiab cov khw muag khoom yuav tsis muab cov hnab yas pub dawb ntxiv lawm txhawm rau txhim kho peb tus cwj pwm ntawm kev siv cov hnab yas tsawg dua thiab lub tswv yim ntawm kev rov ua dua tshiab.
(2) Kev tshawb fawb txog cov hnab yas biodegradable: Tam sim no, biodegradable hnab yas feem ntau suav nrog plaub pawg:
1. Photodegradable plastics: Cov yas no muaj cov khoom siv photosensitizers, ua rau lawv maj mam decompose nyob rau hauv tshav ntuj. Lawv muaj nyob rau hauv hom ua ntej ntawm biodegradable plastics, tab sis lawv lub sij hawm degradation yog qhov nyuaj rau kwv yees vim qhov txawv ntawm lub hnub ci thiab huab cua.
2. Biodegradable plastics: Cov yas no tuaj yeem decomposed tag nrho rau hauv qis -molecular- hnyav cov tebchaw nyob rau hauv kev ua ntawm cov kab mob. Lawv qhov zoo muaj xws li kev khaws cia thiab kev thauj mus los yooj yim; tsuav lawv khaws cia qhuav, lawv tsis tas yuav tiv thaiv lub teeb, thiab lawv muaj ntau yam kev siv.
3. Diam duab / biodegradable plastics: Cov yas no ua ke photodegradation thiab microbial degradation, muaj cov yam ntxwv ntawm ob qho tib si photodegradable thiab microbial plastics.
4. Dej- cov yas degradable
Cov yas no muaj dej- nqus cov khoom, cia lawv yaj hauv dej tom qab siv. Lawv tsuas yog siv rau hauv kev kho mob thiab kev tu cev, xws li hnab looj tes kho mob, thiab yooj yim rau kev pov tseg thiab tshuaj tua kab mob.
Rau qhov peb muaj sia nyob thiab ib puag ncig nyob, nws raug nquahu kom txhua tus siv ob peb lub hnab yas li sai tau, lossis rov siv dua, lossis tsuas yog siv cov khoom siv biodegradable xwb, txhawm rau txo lawv cov pa phem rau lub ntiaj teb.
Koom nrog Kitech Machinery nyob rau hauv pioneering ib tug huv si yav tom ntej. Los ntawm kev nqis peev hauv cov txheej txheem yas pelletizing thiab rov ua dua tshiab, peb tuaj yeem sib sau ua ke txo kev puas tsuaj ib puag ncig thiab tsim kom muaj tus qauv zoo dua rau kev siv yas. Cia peb tsis yog tswj cov khib nyiab xwb - cia peb rov txhais nws.
