A cewar bayanai, batirin maɓalli ɗaya na iya gurɓata lita 600,000 na ruwa, wanda mutum zai iya amfani da shi tsawon rayuwarsa. Idan aka jefa wani ɓangare na batirin lamba 1 a cikin filin da ake noma amfanin gona, murabba'in mita 1 na ƙasar da ke kewaye da wannan batirin sharar zai zama ba kowa. Me ya sa ya zama haka? Domin waɗannan batirin sharar suna ɗauke da adadi mai yawa na ƙarfe masu nauyi. Misali: zinc, gubar, cadmium, mercury, da sauransu. Waɗannan ƙarfe masu nauyi suna shiga cikin ruwa kuma kifaye da amfanin gona suna sha. Idan mutane suka ci waɗannan kifaye masu gurɓataccen kifi, jatan lande da amfanin gona, za su sha wahala daga gubar Mercury da cututtukan tsarin jijiyoyi na tsakiya, tare da adadin mace-mace har zuwa 40%. An gano Cadmium a matsayin Carcinogen na Class 1A.

Batiran sharar gida suna ɗauke da ƙarfe masu nauyi kamar su mercury, cadmium, manganese, da gubar. Idan saman batiran ya lalace saboda hasken rana da ruwan sama, abubuwan ƙarfe masu nauyi da ke ciki za su shiga cikin ƙasa da ruwan ƙasa. Idan mutane suka cinye amfanin gona da aka samar a ƙasa mai gurɓata ko suka sha ruwa mai gurɓata, waɗannan ƙarfe masu guba za su shiga jikin ɗan adam kuma su yi ta zuba a hankali, wanda hakan zai iya zama babbar barazana ga lafiyar ɗan adam.

Bayan sinadarin mercury da ke cikin batirin sharar gida ya cika, idan ya shiga ƙwayoyin kwakwalwar ɗan adam, tsarin jijiyoyi zai lalace sosai. Cadmium na iya haifar da lahani ga hanta da koda, kuma a cikin mawuyacin hali, lalacewar ƙashi. Wasu batirin sharar gida kuma suna ɗauke da gubar acid da ƙarfe mai nauyi, wanda zai iya haifar da gurɓatar ƙasa da ruwa idan ya shiga yanayi, wanda a ƙarshe zai iya zama haɗari ga mutane.
Hanyar maganin batir

1. Rarrabawa
Fasa batirin sharar da aka sake yin amfani da shi, cire harsashin zinc da ƙarfen ƙasa na batirin, cire murfin jan ƙarfe da sandar graphite, sauran baƙin abu kuma cakuda Manganese dioxide da ammonium chloride da ake amfani da su azaman tushen batirin. Tattara abubuwan da ke sama daban-daban kuma a sarrafa su don samun wasu abubuwa masu amfani. Ana wanke sandar graphite, a busar da ita, sannan a yi amfani da ita azaman lantarki.

2. Sinadarin zinc
A wanke harsashin zinc da aka cire sannan a saka shi a cikin tukunya mai ƙarfe. A dafa shi har ya narke sannan a bar shi ya yi zafi na tsawon awanni 2. A cire saman ƙurajen, a zuba a ciki don ya huce, sannan a zuba a kan farantin ƙarfe. Bayan ya taurare, sai a samo ƙwayoyin zinc.

3. Sake amfani da zanen tagulla
Bayan an daidaita murfin jan ƙarfe, a wanke shi da ruwan zafi, sannan a ƙara wani adadin sinadarin sulfuric acid 10% don tafasa na tsawon mintuna 30 don cire saman saman oxide. A cire, a wanke, a busar da shi don samun tsiri na jan ƙarfe.

4. Maido da ammonium chloride
A saka baƙin abu a cikin silinda, a zuba ruwan dumi mai digiri 60 na Celsius sannan a gauraya na tsawon awa 1 don narkar da dukkan sinadarin ammonium chloride a cikin ruwa. A bar shi ya tsaya cak, a tace, sannan a wanke ragowar matatar sau biyu, sannan a tattara ruwan uwar; Bayan an yi amfani da injin tsotsar ruwa har sai an sami farin fim ɗin crystal a saman, sai a sanyaya a tace don a sami crystal na ammonium chloride, sannan a sake yin amfani da injin tsotsar ruwan.

5. Maido da Manganese dioxide
Wanke ragowar matatar da aka tace da ruwa sau uku, a tace, a saka kek ɗin matatar a cikin tukunya a tururi don cire ɗan carbon da sauran abubuwan halitta, sannan a saka shi a cikin ruwa a gauraya shi sosai na tsawon mintuna 30, a tace shi, a busar da kek ɗin matatar a zafin 100-110oC don samun baƙin Manganese dioxide.

6. Ƙarfafawa, binnewa mai zurfi, da kuma adanawa a cikin ma'adanai da aka yi watsi da su
Misali, wata masana'anta a Faransa tana fitar da nickel da cadmium daga cikinta, wanda daga nan ake amfani da shi don yin ƙarfe, yayin da ake sake amfani da cadmium wajen samar da batura. Sauran batura masu sharar gida galibi ana jigilar su zuwa wuraren zubar da shara na musamman masu guba da haɗari, amma wannan aikin ba wai kawai yana kashe kuɗi mai yawa ba, har ma yana haifar da sharar gida, saboda har yanzu akwai kayan aiki masu amfani da yawa waɗanda za a iya amfani da su azaman kayan aiki.