Experimental analysis on effective factors of water iodine amount

  Objective   To understand the factors that can affect the iodine amount of the water quality and the evaluation of the iodine amount of the water in Shenzhen city.

  Methods   The water iodine was tested with segmenled flow analysis.

  Results   The amount of water iodine in the water resource of Shenzhen declined with the increase of the vertical distance from the coast, which was 80.1%lower within 5 km than that beyond 50 km, the coagulation and sedimentation and the airing could lessen the amount of water iodine by more than 35%(P_ar < 0.01), but the factors such as adding of chlorine and ferrous, boiling and solarization could not cause significant difference(P_ar < 0.05).

  Conclusion   The amount of water iodine in Shenzhen city and its districts was rich, that was almost 16μg/L in the suburb, but was poor in the far suburban area.The iodine in the water resource lost apparently during its producing, but that in tap water was stable.