Qhov kev txwv tam sim no pom zoo ntawm arsenic hauv dej haus yog 10 μg / L, txawm hais tias qhov kev qhia tus nqi no tau raug xaiv los ua ntu zus vim tias muaj teeb meem hauv kev tshem tawm arsenic los ntawm kev haus dej..
Kev tso cai txwv ntawm arsenic hauv av yog dab tsi?
Raws li BIS Standards (IS 10500: 2012) qhov siab tshaj plaws tso cai txwv ntawm Arsenic hauv dej haus yog 0.01 mg/l (ppm) lossis 10 µg/L(ppb).
Leej twg txwv rau arsenic hauv dej haus hauv ppb?
Arsenic yog cov tshuaj lom neeg hlau raug txheeb xyuas tias yog tib neeg carcinogen (International Agency for Research of Cancer). WHO cov lus qhia tus nqi ntawm arsenic hauv dej haus yog 10 ppb. Tam sim no, nyob rau hauv feem ntau ntawm cov teb chaws Esxias cuam tshuam arsenic, qhov tso cai txwv ntawm arsenic hauv dej haus yog 50 ppb.
Dab tsi yog qhov kev lees paub ntawm arsenic?
Lub Chaw Saib Xyuas Kev Tiv Thaiv Ib puag ncig hauv Tebchaws Meskas (U. S. EPA) tau teeb tsa arsenic siab tshaj plaws cov pa paug (MCL) rau cov khoom siv dej rau pej xeem ntawm 0.010 mg/L. Qhov no yog sib npaug rau 0.010 qhov chaw ib lab (ppm), 10 micrograms / liter (µg / L), lossis 10 qhov chaw hauv ib billion (ppb).
Ntau npaum li cas arsenic hauv dej ntau dhau?
Hauv dej haus: Lub Chaw Tiv Thaiv Ib Cheeb Tsam (EPA) txwv qhov siab tshaj plaws ntawm arsenic tso cai hauv Asmeskas cov dej haus rau 10 micrograms ib liter (μg / L), lossis 10 ib feem billion (ppb). Rau cov dej haus,Lub Chaw Tswj Xyuas Khoom Noj thiab Tshuaj (FDA) tau teeb tsa 10 ppb.
Source, effect and permissable limit of arsenic in drinking water
