致癌材料 "石棉"

cloudblade in #hive-173575 • 2 years ago

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 ...

#cn #lassecash #palnet #telokanda #archon #proofofbrain #cent #aeneas #trafficinsider #lern

2 years ago in #hive-173575 by cloudblade

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gangstalking 2 years ago

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