水质 FT, TH

kkshamo

请问水质分析参数中 FT , TH 是什么意思，对于不同用途的值是多少？谢谢！

gaoyns

在水质分析参数中：
6 G* z5 J! b7 C! N% t* fTH （Total hardness），表示水的总硬度。
: T# }' [8 _6 s1 l2 AFT （Flocculant），是微生物吸附絮凝材料。

kkshamo

2 b0 U6 Z7 w4 y+ z7 `非常感谢2楼 大哥/姐 ！如果能把单位带上或更详细点就更好了！

gaoyns

3# kkshamo
; T7 a. @" z5 A7 }6 b9 @TH （Total hardness），总硬度，等于非碳酸盐硬度（永久硬度）与碳酸盐硬度（暂时硬度）之和。
单位是：折合成碳酸盐当量，1毫克当量 / 升 = 1 硬度。
FT 是一种物质，是测定水中微生物含量时用的吸附絮凝剂。

Sigma

偶这里只有英文资料，所以凑合下吧...
FT:
- w& X9 S. G5 {0 O- zFlocculants, or flocculating agents, are chemicals that promote flocculation by causing colloids and other suspended particles in liquids to aggregate, forming a floc. Flocculants are used in water treatment processes to improve the sedimentation or filterability of small particles. For example, a flocculant may be used in swimming pool or drinking water filtration to aid removal of microscopic particles which would otherwise cause the water to be turbid (cloudy) and which would be difficult or impossible to remove by filtration alone.

, c- G  @8 r5 [# t% vMany flocculants are multivalent cations such as aluminium, iron, calcium or magnesium. These positively charged molecules interact with negatively charged particles and molecules to reduce the barriers to aggregation. In addition, many of these chemicals, under appropriate pH and other conditions such as temperature and salinity, react with water to form insoluble hydroxides which, upon precipitating, link together to form long chains or meshes, physically trapping small particles into the larger floc.