17 Lub Plaub Hlis Ntuj 2023---Cov kws tshawb fawb Suav ntawm Tsinghua University, Beijing, tau pom cov yeeb yaj kiab yas uas muaj tshuaj lom neeg rau pob zeb, ua rau pom qhov pom ntawm cov khoom yas tshiab hauv ib puag ncig.
Deyi Hou, ib tus kws tshawb fawb sau ntawv thiab tus kws tshawb fawb txog av thiab hauv av, hais tias qhov kev tshawb fawb no yog thawj zaug los nthuav tawm cov tshuaj sib txuas ntawm cov yas thiab pob zeb hauv ib puag ncig.
Plastic pob zeb complexes tsim thaum cov khib nyiab irreversibly absorbs rau hauv lub pob zeb tom qab dej nyab. Cov complexes suav nrog LDPE lossis PP zaj duab xis daig mus rau quartz-dominated mineral matrices.
Txoj kev tshawb no sau hais tias "kev tshawb fawb yav tom ntej yuav tsum ntsuas qhov tshwm sim no hais txog kev hloov pauv hauv ecosystem fluxes, txoj hmoo thiab kev thauj mus los thiab cuam tshuam ntawm cov pa phem yas," qhia tias yuav tsum muaj kev tshawb fawb ntxiv los kos cov lus xaus txog cov pob zeb yas.
Newfound yas pob zeb
Txoj kev tshawb no tau luam tawm hauv Environmental Science thiab Technology. Lub hauv paus ntawm cov pov tseg yas tau khaws cia nyob ib ncig ntawm ib tug kwj dej hauv Hechi City, Tuam Tshoj. Plastics pom yog PP thiab PE zaj duab xis.
Cov yas tau los ua cov tshuaj sib txuas rau cov pob zeb los ntawm cov pa roj carbon atoms ntawm qhov chaw ntawm PE zaj duab xis txuas nrog silicon hauv pob zeb nrog kev pab ntawm oxygen atoms.
Cov kws tshawb fawb ntseeg tias kev sib raug zoo ntawm cov yas zaj duab xis thiab pob zeb tau tsav los ntawm lub teeb ultraviolet los ntawm lub hnub lossis los ntawm kev ua haujlwm metabolic ntawm microbes nyob ntawm cov pob zeb yas.
Txawm li cas los xij, PP zaj duab xis tau tshwm sim los txuas rau pob zeb los ntawm lub cev rog, tsis yog tshuaj lom neeg. "Cov neeg nyob rau hauv lub xyoo pua nees nkaum thiab nees nkaum-thawj tab tom tsim cov ntaub ntawv geological tshiab,"Hou hais rau Xwm.
Cov yas hauv Suav teb
Cov pob zeb zoo li no tuaj yeem xau microplastics rau hauv ib puag ncig. Txhawm rau ntsuam xyuas qhov kev puas tsuaj, cov kws tshawb fawb tau tshem tawm cov yeeb yaj kiab thiab muab tso rau hauv cov voj voog ntub thiab qhuav kom ua raws li cov dej nyab ntawm lub sijhawm.
Pab neeg no pom cov nqi ntawm microplastic tiam ntau dua li tau tshaj tawm hauv kev sim kuaj sim ua cov yas tso rau hauv qhov chaw pov tseg, dej hiav txwv thiab cov sediment marine.
Raws li cov lus ceeb toom, Tuam Tshoj yog lub ntiaj teb tus tsim khoom loj tshaj plaws thiab cov neeg siv khoom yas. Lub teb chaws tseem yog tus tsim khoom loj tshaj plaws thiab xa tawm ntawm ib leeg-siv thiab nkauj xwb yas.
Tsis tas li ntawd, xyoo 2020, Tuam Tshoj tau tsim txog 60 lab metric tons ntawm cov pov tseg yas, ntawm 16 lab metric tons tau rov ua dua, raws li Tuam Tshoj National Resources Recycling Association.
Raws li Tus Nqi ntawm Tuam Tshoj Txoj Cai Lij Choj ntawm Kev Tiv Thaiv Plastics hauv xyoo 2020 daim ntawv tshaj tawm, qhov nruab nrab, kwv yees li 17% ntawm cov yas siv hauv Suav teb tau siv dua tshiab.
Tuam Tshoj kuj tau raug liam tias yog tus pab cuam loj tshaj plaws rau cov pov tseg yas hauv hiav txwv, thaum lwm qhov kev tshawb fawb tau hu ua Phillippines qhov loj tshaj plaws. Qhov loj ntawm dej hiav txwv plastics tuaj yeem raug ntaus nqi rau lub teb chaws txoj kev hauv dej uas coj ncaj qha mus rau hauv dej hiav txwv.
