致癌材料 "石棉"

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图片引用自 https://zh.wikipedia.org/wiki/石棉

相传春秋战国时代,即有以石绵来编织而成的布,这种布的颜色并非纯白,但放入火中烧炼之后,却会变得洁白如雪,故被称之为「火浣布」。

"石棉" 被称为长在地上的布,这是一种天然的纤维结晶状的矽酸盐类矿物,化学式为 Mg3Si2O5(OH)4,其颜色有白、绿、红、黄、蓝等等,以白色、灰色、绿色居多,其成分中含有一定数量的水,分裂成絮状时,呈现为白色,其特性为纤维光滑、有弹性、柔软,且绝缘、隔音、隔热、耐高温、耐酸碱、耐腐蚀、耐磨损等等,即材料上该有的优点,它通通都有 ...

石棉共有六大类,
最常见的三大类为:
温石棉(白石棉、蛇纹石石棉),
铁石棉(褐石棉),
青石棉(蓝石棉、角闪石石棉、阳起石石棉、透闪石石棉、直闪石石棉)...

石棉的应用多达三千余种,比如防火布、电线电缆配水等管路、建材之瓦砖门墙板等、垫圈、填充物、包装材料等等 ...

世界卫生组织将石棉定为一级致癌物。

尘状的石棉,乃是极其微小的石棉纤维,其纤维大小约是人类头发的千分之一,当其飞散到空中的时候,非常容易被人体给吸入肺部,经20~40年的累积,会诱发肺尘病、肺癌、恶性间皮瘤等等 ...

欧盟国家于 2005 年全面禁用石绵制品,日本于 2006 年禁用,加拿大于 2012年禁用,至今,已被近百个国家给禁用,但仍有不少国家因为石绵的巨大经济利益,仍在开采和使用,比如俄罗斯和中国,便为现今全球开采量和使用量之第一和第二 ...

石绵所诱发的疾病,潜伏期长达 20 年,但若有抽烟的习惯,则罹患肺癌的风险就会倍增 ...

其实,中国是有禁止石棉的使用的,但并非六大类都被禁,而是只禁止使用其中的几类,比如闪石类石棉便被禁止使用,但温石棉却仍可继续使用,而不管哪一类的石棉,都是有危害性的 ...



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