Investigation of iodine concentration in salt, water and soil along the coast of Zhejiang, China

来源 :浙江大学学报B(英文版) | 被引量 : 0次 | 上传用户:liyongrubylian
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Objective: We aim to describe the environment iodine concentration in salt, water and soil along Zhejiang Province coast in the China foreland. It will be helpful for us to judge whether this area is insufficient in iodine and universal iodized salt is necessary or not. Methods: We collected iodized salt samples, drinking water samples (tap water in the towns, and well water or spring water in the villages), water samples from different sources (ditches, lakes, rivers) and soil samples through random sampling in June, 2005. Salt, water and soil iodine was detected by arsenic-cerium redox method. Statistical analysis was expressed as mean±SEMby Windows SPSS 13.0. Results: (1) The iodine concentration in salt was 27.9±4.33 mg/kg (n=108). (2) Seventy-five water samples were collected. The water iodine value was 0.6~84.8 μg/L (mean of 11.66 μg/L). The watershed along the Qiantang River has significantly higher iodine content than the water in Linan in mountain area (P<0.01). The iodine content and mean iodine content of tap water, well or spring water and natural water sources were 4.30±2.43 μg/L (n=34), 23.59±27.74 μg/L (n=19)and 12.72±10.72 μg/L (n=22) respectively. This indicated that among environmental water sources, the ditch iodine content was the highest with river water iodine being the lowest (P<0.01). (3) Soil iodine value was 0.11~2.93 mg/kg (mean of 1.32 mg/kg).Though there was no statistical difference of soil iodine in different districts (P=0.131), soil iodine content correlated positively with water iodine content. Conclusion: Iodine concentration in salt accords with national policy of adding iodine in salt. Foreland has more iodine in water than mountain area. The data reflected that water and soil iodine in foreland area was not high, which suggests universal iodized salt should be necessary. Environment iodine has relatively close association with pollution.
其他文献
Water mist is one of the effective candidates for halon replacement used in electrical environment fire protection. Water mist additives may greatly enhance fir
Objective: This study aimed to establish chemiluminescent immunoassay (CLIA) for quantitative determination of theophylline levels in human serum. Methods: To m
近年来,中国农业面源污染问题越发凸显,已经成为中国政府当前急需解决的重大问题.农业面源污染发生机理及影响的复杂性和特殊性,使得对其控制与管理不能再沿袭中国对城市工业
An analytical method has been developed to determine bisphenol A and five degradation products of alkylphenol ethoxylates in sewage and sludge. The parameters o
A novel triolein-embedded adsorbent for removal of persistent organic pollutants (POPs) from water was developed. In this paper, taking dieldrin and endrin as t
Upper water structure over the last 4 million years in the northern South China Sea (SCS) was reconstructed by sea surface temperature (SST) and primary product
Electrochemically assisted photocatalysis is an effective approach to improve photocatalytic efficiency. In this paper, modified β-PbO2 electrode was prepared
于2010年7~9月对珠江水产研究所内养殖池塘的水质进行调查,分析探讨了池塘夏季氮的昼夜变化特征.研究结果表明:氨氮(NH(4)(+)-N )、无机氮(DIN)、总氮(TN)均存在明显的昼夜变
本文在分析服务标准的特性,以及目前在服务标准管理方面存在的问题的基础上,着重在服务标准计划编制、服务标准草案稿编制、服务标准研制主体、服务标准管理办法间的协调等方
采用回流法合成了OMS -2,同时以OMS -2为载体,采用浸渍法负载CeO2制备了Ce/OMS-2催化剂,运用X射线衍射、拉曼光谱、BET、H2 - TPR和NH3 - TPD等方法对催化剂进行表征,并考察C