“I-CURCRIT” yokuhola eHong Kong Tap Water: I-Copper Throat soler

Isiyaluyalu samanzi omthofu sesike saba senkingeni isikhathi esingaphezu kwezinyanga ezimbili, futhi ekugcineni kunqunywa ukuthi i “isigebengu esiholayo” ukuthi i-tin soldering material yomphimbo wethusi iqukethe umthofu. Ithimba elisungulwe nguhulumeni waseHong Kong ukuphenya umthofu ngokweqile emanzini okuphuza likhiphe imiphumela yokuqala ngoSepthemba 25. Kutholwe ukuthi amasampula ezindawo zokushisela umphimbo wethusi e-Kang Ching House, Kai Ching Village equkethwe 41% womthofu, 585 izikhathi eziphakeme kunezinga laseBrithani. Ithimba elijutshiwe alizange liphendule ukuthi ngabe usonkontileka othintekayo uzoziphendulela yini ngemigudu yomthetho, kodwa wenze izincomo ezimbalwa kuphela, kufaka phakathi ukusetshenziswa kokuthengwa okuphakathi kwezinto zokushisela esikhathini esizayo, ukuze kuncishiswe ukuthenga okuyiphutha okuya phansi komfula.

Ezinyangeni ezimbili ezedlule, iqembu elisebenzayo lihlole isigaba sesibili se-Qiqing Village kanye ne-Kwai Lian Village lapho okuqukethwe komthofu emanzini okuphuza kudlula izinga., futhi isuswe ngaphezu 100 izingxenye zesistimu yokuhlinzeka ngamanzi kwangaphakathi, na- 44 amapayipi ethusi, 28 amasango, futhi 3 Imitha yamanzi, 12 ompompi kanye 47 izikhundla zokushisela zahanjiswa zabuyiselwa elabhorethri ukuze kuhlolwe okuhlukahlukene, lapho kwasetshenziswa amapayipi ensimbi engagqwali eHong Fuk Village, I-Yuen Long, izivivinyo zokuqhathanisa.

Ithimba lithe njengoba selihlole amathangi amanzi angaphansi komhlaba kanye namathangi amanzi aphezu kophahla esigabeni sesibili saseKai Ching Village kanye neKwai Lian Village., kwatholakala ukuthi kwakukhona ngaphansi 1 i-microgram yomthofu ilitha ngalinye lamanzi, namapayipi amanzi asuka phansi kuya ophahleni ayenziwe ngamapayipi ensimbi. Akukho ukushisela okuhilelekile, ngakho kunesizathu sokukholelwa ukuthi amanzi alethwa emapayipini amanzi kahulumeni eya ezakhiweni awanawo umthofu. Into eyinhloko yalolu phenyo amapayipi ethusi ehla esuka ophahleni lwendlu eya phansi.

Ilungu leqembu lomsebenzi u-Chen Hanhui wachaza ukuthi ukuhlolwa kokukhululwa ukujova amanzi ezingxenyeni ze 24 amahora wokubala inani eliphelele namandla adonsela phansi omthofu akhishwe engxenyeni ngayinye yawo wonke uchungechunge lokuphakelwa kwamanzi. Imiphumela yokuhlolwa kokukhishwa ithole ukuthi ochungechungeni lokuhlinzekwa kwamanzi e-Kang Ching House, Kai Ching Village, kwakhishwa umthofu emasangweni engxubevange yethusi, ompompi, kanye namapayipi ethusi/izindawo zokunamathisela ezithambile ezinobubanzi obungaphansi 76 m. Phakathi kwazo, inani lokukhululwa lezikhundla ze-solder laliphezulu kakhulu. Ukuhlaziywa kwezinto ezibonakalayo kubonise ukuthi okuqukethwe okuphambili kwaba 41%, okwakukhona 585 izikhathi okuqukethwe okuholayo kwe 0.07% ngokwezinga laseBrithani.

Ithimba laphinde lanquma ukuthi umthamo otholakala emanzini okuphuza kulezi zindawo ezimbili wawungaphezu kwesilinganiso futhi wawungabangelwa ukufakwa kwamapayipi e-copper alloy.. Ithimba lenze ukuhlaziya kwesayensi kwe-isotope yomthofu futhi lathola ukuthi izilinganiso ze-isotope eziholayo zezinto zokudambisa i-lead-tin kanye ne-copper alloy plumbing fixtures ngokusobala ingeyamaqembu amabili ahlukene., kanye ne-isotopu yezinto ezithengiswayo eziqukethe umthofu namasampula amanzi anokuqukethwe komthofu oweqile Izilinganiso ezimaphakathi ziyahambisana kakhulu. Ngamanye amazwi, umthofu emanzini uvela ezintweni ezisongelwayo zomthofu.

Ngaphezu kwalokho, ithimba lathola ukuthi abanye osonkontileka sebezifulathele. Amasango kanye nezinhlobo zompompi ezifakwe kwezinye zezindlu zomphakathi zazingafani nalezo ezazithunyelwe ekuqaleni eMnyangweni Wokuhlinzeka Ngamanzi.. Unobhala wethimba kanye nomsizi womqondisi woMnyango Wokuhlinzeka Ngamanzi, Leung Chung-li, uthe uhlobo lwesishintshi sesango esisetshenziswa e-Kai Ching Village sihlukile kuhlobo olumenyezelwe, futhi okuqukethwe okuholayo kwesishintshi sesango akuhlangabezani nezinga laseBrithani. Ithimba lizolandelela umphakeli wezinto ezibonakalayo ofanele. Ungalahli ukulikhipha ohlwini olugunyaziwe.

Ukuze uvimbele ukwenzeka komthofu emanzini okuphuza, ithimba lomsebenzi lenze izincomo eziningi, kubandakanya nokuhlolwa kwezindawo okwanele nokujwayelekile ngabantu abaqeqeshiwe abavela eMnyangweni Wezokwakha; ukusetshenziswa kokuhlolwa kokuhola okusheshayo noma ama-X-ray fluorescence spectrometers ezikhundleni zokushisela; kanye nesidingo selayisensi Abasebenza ngamapayipi kanye nabantu abagunyaziwe bengeze imingcele emisha emine ekuhloleni izinga lamanzi lohlelo olusha lokuhlinzekwa kwamanzi lwangaphakathi olusanda kuqedwa., okungukuthi ukuhola, I-Chromium, i-cadmium ne-nickel; kunconywa ukuthi i-Housing Authority ifunde ukusetshenziswa kwezinto zokushisela ezithengwa endaweni eyodwa; futhi kunconywa ukuthi iSigungu Samanzi sifunde Sibuyekeze imithetho efanele.

Leli thimba kulindeleke ukuthi lishicilele umbiko walo wokugcina wophenyo maphakathi no-Okthoba. Ithimba labasebenzi liphinde lahlola ukukhishwa kwezinye izinsimbi ezintathu ezisindayo, kuhlanganise ne-cadmium, i-chromium ne-nickel kuzo zonke izingxenye zesistimu yokuphakelwa kwamanzi. Imiphumela ikhombise ukuthi kutholwe i-nickel ekhishini kanye nompompi bemishini yokuwasha eyunithi ye-Kangqing House e-Kai Ching Village.. Nokho, kunamanzi amancane kuphela kumpompi, futhi i-nickel ingagezwa ngemva komzuzwana noma emibili. Imiphumela yokuhlolwa yokukhishwa kwe-cadmium ne-chromium kudivayisi ngayinye ingaphansi kwezinga elibonakalayo, leyo, okuqukethwe kuncane kune 1 microgram ilitha lamanzi.