Thaum lub Kaum hlis, kev yuav khoom thiab kev muag khoom ntawm lub lag luam ua ke yuav tsum muaj kev kawm zoo dua hauv lub Cuaj Hli. Zuag qhia tag nrho cov roj ntawm cov pa roj carbon ntau yog qhov ceev, tshwj xeeb tshaj yog cov hmoov activated carbon , lub Hoobkas yuav luag dawb ntawm Tshuag.
Tamsim no, tau los ntawm "19 th CPC National Congress", muaj kev cai nruj heev ntawm cheeb tsam ib puag ncig kev tiv thaiv thiab ruaj ntseg ntau, uas cuam tshuam rau tag nrho cov khoom. Raws li tus nqi ntawm cov kua phosphoric acid tau nce tsis ntev los no, tuam ntxhab kuj tau tsa cov nqi ntawm cov ntoo raws li qhib pob zeb ua kom . Xa mus rau lub txiv kab ntxwv plhaub activated carbon , qhov tsis muaj raw cov ntaub ntawv tau coj mus rau zawm ntawm cov kua, yog li nws cov nqi yuav nce.
