Tui mine

Ma'adinan Tui mahakar ma'adinai ce da aka yi watsi da ita a yammacin gangaren Dutsen Te Aroha a cikin Kaimai Range na New Zealand. An yi la'akari da shi a matsayin wurin da ya fi gurɓata a cikin ƙasar, biyo bayan tsabtace tsohon rukunin Kamfanin Masana'antu na Fruitgrowers a Māpua, Nelson. Tarihi Tui mine tana cikin samarwa a shekara ta 1881. An gina Hanyar jirgin sama a kan hasumiyoyi 12 a cikin shekara ta 1889. An gina hanya a cikin 1950, lokacin da aka ce ma'adinin ya fi 1,650 feet (500 m) ft (500 matakin teku. A cikin shekarun 1960, ma'adinin Tui ya cire jan ƙarfe, gubar da Zinc sulphides, amma yana da matsala tare da gurɓata su da mercury. An watsar da ma'adinin a cikin 1973, bayan kamfanin ma'adinai na Norpac Mining ya fadi. An sayar da kayan aikin ga ma'adinai na Mineral Resources (NZ) a Waihi, amma an bar sharar gida, dutsen dutse da ma'adanai. Tailings suna da adadi mai yawa na zinc da cadmium. Ana adana ma'adanai a bayan madatsar ruwa a cikin babban yanki mai kama da tafki wanda ke da tsami, mai tsayi. Dam din ya ƙunshi fiye da 100,000 cubic mita na acidic sosai, sulphide-rich tailings. A shekara ta 1997, ba a sake gina shuke-shuke na halitta ba a kan tailings sama da shekaru 20. Batutuwan muhalli Jami'ar Waikato ta gano matsalar manyan karafa da ke gurbata ruwa a shekarar 1984. An yi la'akari da dam din wutsiya a matsayin rashin kwanciyar hankali kuma yana fitar da ma'adanai daban-daban, ciki har da karafa masu nauyi, cikin hanyoyin ruwa da ke makwabtaka da shi kuma hakan ya yi illa ga yanayin rafi. A cewar muhalli Waikato, ma'adinan Tui yana da manyan tasirin muhalli guda uku; Karfe masu nauyi da cadmium suna fitowa daga madatsar ruwa zuwa cikin rafin Tunakohoia, wanda ke gudana ta hanyar ƙasar da Ma'aikatar Karewa ke sarrafawa da kuma tsakiyar garin Te Aroha. Shekaru huɗu bayan an rufe ma'adinin, an gano cewa an gurɓata ruwan garin Te Aroha da ƙarfe mai nauyi da ke fitowa daga wutsiyoyi. Har ila yau, an gurɓata ramin Tui daban da ƙarfe mai nauyi daga madatsar ruwan. Dam din da aka watsar a cikin tafkin Tui yana cikin haɗarin rushewa a cikin wani taron girgizar ƙasa mai matsakaici ko kuma mummunan yanayi. Wannan na iya haifar da 90,000 cubic mita na sharar ma'adinai don zama ruwa kuma ya gudana a cikin kogin Tui kusa da Te Aroha. Magani A cikin 2007, Gwamnatin New Zealand ta ba da sanarwar cewa za a samar da dala miliyan 9.88 don tsaftace shafin tare da aikin da aka shirya za a kammala shi a shekara ta 2010. A watan Afrilu na shekara ta 2010 an ba da rahoton cewa kimanin kudin tsaftacewa zai zama dala miliyan 17.4 kuma a shekara ta 2011 an ba da adadin dala miliyan 16.2 don tsaftacewa tare da mafi yawan kudade daga gwamnatin tsakiya. An kammala gyaran shafin ma'adinai a cikin 2013, a jimlar dala miliyan 21.7. Dubi kuma Ma'adinai a New Zealand Batutuwan muhalli a New Zealand Bayanan da aka ambata 37°31′13″S 175°43′45″E