Chifukwa Chake Mukufunika Kwambiri Kuti Musiye Kusefa Padziwe

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Ngati inu munayamba kukodza mu dziwe, inu mukudziwa kuti lonse "madzi kutembenukira mitundu ndipo ife tidziwa inu munachita izo" chinthu okwana m'tauni nthano. Koma kusowa kwa chilungamo m'mbali mwa dziwe sikutanthauza kuti simuyenera kudzimva kuti ndinu wolakwa pazomwe mudachita. Nkhani zaposachedwa-kafukufuku wamadziwe osambira 31 ndi malo osambira ku Canada akuwonetsa kuti kusambira pakati ndi vuto lalikulu kwambiri.

Gulu la ofufuza ochokera ku Yunivesite ya Alberta, Edmonton, adapeza kuti 100% yamadziwe ndi zitsamba zomwe adaziyesa zinayesedweratu ndi acesulfame potaziyamu (ACE), chotsekemera chochita kupanga chomwe chimapezeka muzakudya zopangidwa zomwe zimadutsa mthupi osasinthidwa. (Kutanthauzira: pee.) Dziwe lina lalikulu ngati Olimpiki (830,000 malita okwana) linali ndi malita 75 mkodzo, malinga ndi kafukufukuyu. Kukuthandizani kuti muwone m'maganizo mwanu: izi zili ngati kutaya mabotolo 75 athunthu a Nalgene mu dziwe losambira. UM, zoipa.

Tidakhala ngati tikudziwa kale kuti ndi anthu angati omwe anali olakwa pakupita nambala wani m'madzi; Pafupifupi 19 peresenti ya anthu adavomereza kuti adasanthula padziwe mu kafukufuku wa 2012 ndi International Journal of Aquatic Research and Education. Koma kudziwa kuchuluka kwake komwe kumasambira mozungulira nafe ndi chikumbutso chosadetsa nkhawa kuti kupita kumadzi kapena kudula mitengo mu dziwe si ntchito yathanzi, yosangalatsa monga momwe tingaganizire. (Izi ndi zomwe wosambira wa Olympic Natalie Coughlin amaganiza za kukodza mu dziwe.)

Koma ndi zomwe chlorine amapangira, kulondola? Osati mwachangu kwambiri, Phelps. Madziwe amadzaza ndi mankhwala ophera tizilombo kuti titeteze madzi osabala mabakiteriya owopsa (monga salmonella, giardia, ndi E. coli), ndipo mankhwala ophera tizilombo amathandizidwa ndi mankhwala (werengani: dothi, thukuta, mafuta odzola, ndi-yep-pee ) yomwe anthu amalowetsa mu dziwe, malinga ndi kanemayo ndi American Chemical Society. Izi zimapanga chinthu chotchedwa disinfection byproducts (DBPs). Mkodzo makamaka muli zambiri urea, amene amaphatikiza ndi klorini kupanga DBP wotchedwa trichloramine, amene amayambitsa kuti tingachipeze powerenga dziwe fungo, komanso wofiira, maso okwiya, ndipo wakhala zikugwirizana (monga DBPs ena ambiri) ndi nkhani kupuma monga mphumu. Ndipo ngakhale zinthu zina zakuthupi zimathandizira ma DBP m'madziwe, mkodzo umayang'anira theka ma DBP opangidwa ndi osambira. Maiwe a Somes adapezeka kuti ali ndi mutagenic yochulukirapo kawiri (yodzaza ndi zosintha majini) ndipo ma tub otentha anali 4,4 mutagenic kuposa madzi apampopi, malinga ndi kafukufuku wina munyuzipepala Environmental Science & Technology. (Zambiri pa izi: Momwe Gombe Lanu Losangalalira Alili.) Gawo lalikulu la iwo adabwera kuchokera ku urea, malinga ndi ochita kafukufukuwo. (Ndipo izi sizikuwerengera ngakhale majeremusi ena owopsa akusambira mozungulira m'madziwe am'madzi, mayiwe, nyanja, ndi malo osungira madzi.)

Sitingakuuzeni kuti musambe kusambira kwanu, koma ife ndidzatero ndikuuzeni kuti mutulutse chikhodzodzo chanu pasadakhale. Ndipo onetsetsani kuti mwasambira kusamba-zomwe zingatanthauze dothi locheperako ndi thukuta kulowa m'madzi.

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