who飲用水指南第四版與生活用水衛(wèi)生標準gb5749-20xx的限度值比較20xx01-在線瀏覽
2025-01-20 15:05本頁面
【正文】 s. 臭和味 無異臭、異味 無異臭、異味 肉眼可見物 無 No value pH （ pH 單位） 不小于 且不大于 No healthbased guideline value has been proposed for pH. The optimum pH required will vary in different supplies according to the position of the water and the nature of the construction materials used in the distribution system, but it is usually in the range – 鋁（ mg/L） A healthbased value of mg/l could be derived, but this value exceeds practicable levels based on optimization of the coagulation process in drinkingwater plants using aluminium based coagulants: mg/l or less in large water treatment facilities and mg/l or less in small facilities 鐵（ mg/L） Not of health concern at levels causing acceptability problems in drinkingwater 錳（ mg/L） Not of health concern at levels causing acceptability problems in drinkingwater 銅（ mg/L） 2 鋅（ mg/L） Not of health concern at levels found in drinkingwater 氯化物（ mg/L） 250 Not of health concern at levels found in drinkingwater 硫酸鹽（ mg/L） 250 Not of health concern at levels found in drinkingwater 溶解性總固體（ mg/L） 1000 The palatability of water with a total dissolved solids (TDS) level of less than about 600 mg/l is generally considered to be good。 drinkingwater bees significantly and increasingly 3 unpalatable at TDS levels greater than about 1000 mg/l. No healthbased guideline value for TDS has been proposed 總硬度 (以 CaCO3 計， mg/L） 450 Not of health concern at levels found in drinkingwater. May affect acceptability of drinkingwater 耗氧量（ CODMn法，以 O2計， mg/L） 3 水源限制，原水耗氧量＞6mg/L 時為 5 Dissolved oxygen. No healthbased guideline value is remended 揮發(fā)酚類（以苯酚計， mg/L） No value 陰離子合成洗滌劑（ mg/L） In many countries, persistent types of anionic detergent have been replaced by others that are more easily biodegraded, and hence the levels found in water sources have decreased substantially. The concentration of detergents in drinkingwater should not be allowed to reach levels giving rise to either foaming or taste problems. The presence of any detergent may indicate contamination of source water with sewage or ingress of detergent solution into the distribution system, as a result of backflow, for example. 放射性
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