 鲜花( 17)  鸡蛋( 0)
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公认的硬度划分是:
$ B. w) b+ l/ x% l! p) oWater containing calcium carbonate at
, y) h3 A- S e. k, xconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,) g7 w& z) L; t5 A9 [
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard4 `: z4 J- {; J+ w' ~1 h+ D2 M
爱城的水硬度在150-160之间,属于硬水,但不算很硬。这种硬度的水不需要在水厂进行软化处理,适当硬度的水对健康不但无害,反而有益。以下是加拿大主要城市水硬度指标:
8 ?9 C+ B, e6 lMontreal 116 ppm,Calgary 165 ppm, Regina 496 ppm, Saskatoon 160-180 ppm, Winnipeg 77 ppm,Toronto 121 ppm,Vancouver < 3 ppm, Charlottetown, PEI 140–150 ppm, Waterloo Region 400 ppm, Guelph 460 ppm.
R5 _- I L1 ~( G S( \" ]在家里根本不需要安装什么软化水装置,而且都要把水烧开的做法也不可取,钙和镁都沉降了下来,其实这两种元素都是身体需要的,直接喝冷水最好,如果肚子能适应的话。9 S, \* p/ f0 _
8 `1 ]" k3 m& M
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