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10秒装修报价 装修要花多少钱?获得精准报价,省钱30%
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室内空气污染总共分为四类,化学污染,物理污染,生物污染,还有缺氧污染。1、装修、家具、饰品、地毯 甲醛,*等化学气体进入血液 疲劳,肝癌,白血病2、电厂,公测,*的废气 铅、镉等重金属进入血液 肺病,肝癌,肺癌3、空调及风管 细菌,病毒 进入呼吸系统 流鼻涕,感冒,肺癌4、通风量不足 缺氧 血液变浓,循环减少 头痛,衰老,记忆力减退,心 脏病
TVOC是总挥发性有机化合物,包括*系物、有机*化物、氟里昂系列、有机*、*、醇、醚、酯、*和石油泾化合物等。主要来源于有机溶液:如油漆、含水涂料、粘合剂、化妆品、洗涤剂、捻缝胶;建筑材料:如人造板、泡沫隔热材料、塑料板材;室内装饰材料:如壁纸、其他装饰品等;纤维材料:如地毯、挂毯和化纤窗帘;家用*和烟叶的不完全燃烧,人体排泄物等。TVOC可有嗅味,有刺激性,而且有些化合物具有基因毒性。目前认为,TVOC能引起机体免疫水平失调,影响中枢神经系统功能,出现头晕、头痛、嗜睡、无力、胸闷等自觉症状;还可能影响消化系统,出现食*不振、恶心等,严重时可损伤*和造血系统,出现*反应等。
甲醛,这个是人人都知道的,室内装修或家具中使用的材料,诸如胶合板、细木工板、中密度纤维板、刨花板、贴墙布、壁纸、化纤地毯、油漆、涂料、粘合剂等等均不同程度地含有甲醛或可水解为甲醛的化学物质。其次是TVOC,TVOC的主要来源在室外,主要来自*燃烧和交通运输:而在室内则主要来自燃煤和天然气等燃烧产物、吸烟、采暖和烹调等的烟雾,建筑和装饰材料,家具,家用电器,家具、清洁剂和人体本身的排放等。有近千种之多。在室内装饰过程中,VOC主要来自油漆,涂料和胶粘剂。第三还有*系物。污染源其实还蛮多的。
家庭装修污染各项危害性有哪些? 甲醛可引起恶心、呕吐、咳嗽、胸闷、哮喘甚至肺气肿。长期接触低剂量甲醛可引起慢性呼吸道疾病、*月经紊乱,引起新生儿体质降低、染色体异常,引起少年儿童智力下降,致癌促癌。 ▲室内空气中的甲醛来源:用作室内装饰的胶合板、细木工板、中密度纤维板和刨花板等人造板材中含有甲醛。因为甲醛具有较强的粘合性,还具有加强板材的硬度及防虫、防腐的功能,所以用来*多种粘合剂如:脲醛树脂,三聚*甲醛,*基甲醛树酯,酚醛树脂。含有甲醛成分并有可能向外界散发的其他各种装饰建筑材料,比如用脲醛泡沫树酯作为隔热材料的预制板、贴墙布、贴墙纸、化纤地毯、泡沫塑料、油漆和涂料等。目前生产人造板使用的胶粘剂以甲醛为主要成分的脲醛树脂,板材中残留的和未参与反应的甲醛会逐渐向周围环境释放,是形成室内空气中甲醛的主体。装修材料及新的组合家具是造成甲醛污染的主要来源 ▲甲醛是什么物质?甲醛(HCHO)是一种无色易溶的刺激性气体,甲醛可经呼吸道吸收,其水溶液“福尔马林”可经消化道吸收。 ▲长期接触低剂量甲醛的危害性:甲醛具有强烈的致癌和促癌作用。大量文献记载,甲醛对人体健康的影响主要表现在嗅觉异常、刺
室内装修污染四大有害气体是*系物、甲醛、氨气和氡。氡存在于建筑水泥、矿渣砖、装饰石材及土壤中。氡看不到,嗅不到,即使在氡浓度很高的环境里,人们对它也毫无感觉。氡进入人的呼吸系统能诱发肺癌,是除吸烟外导致肺癌的第二大因素。静止的氡核放出某种粒子x后变成钋核,粒子x的动能为Ek1,若衰变放出的能量全部变成钋核和粒子x的动能。试回答以下问题:①写出上述衰变的核反应方程(请用物理学上规定的符号表示粒子x);②求钋核的动能Ek2。