絞り込み

17799

広告

新型コロナ 寮の部員ら88人感染 松江の高校サッカー部 (毎日新聞)

松江市で新型コロナウイルスへの感染が明らかになった91人について、市と島根県は9日夜、88人が立正大淞南(しょうなん)高校(北村直樹校長、生徒数309人)のサッ...

  1. 新型コロナ 両陛下、国民との交流模索 専...
  2. 生きる:小児がん征圧キャンペーン オンラ...
  3. 新型コロナ 両陛下、国民との交流模索 専...
  4. 異変のシグナル:「カネミ油症」救済になお...

ニュース一覧

Hydrogeochemical and statistical analysis of high fluoride groundwater in northern China.

著者 Feng F , Jia Y , Yang Y , Huan H , Lian X , Xu X , Xia F , Han X , Jiang Y
Environ Sci Pollut Res Int.2020 Jul 08 ; ():.
この記事をPubMed上で見るPubMedで表示
この記事をGoogle翻訳上で見る Google翻訳で開く

スターを付ける スターを付ける     (1view , 0users)

Full Text Sources

Understanding the formation of high fluoride (F) groundwater in water-scarce northern China is critical for the sustainable development of the region. This study investigates the effects of F enrichment in groundwater from seven typical regions of northern China, including Datong, Guide, Junggar, Yinchuan, Taiyuan, and Tarim basins and the North China Plain. A literature survey of 534 samples of selected regions showed that 45.13% of groundwater F exceeded the 1.0 mg/L of Chinese drinking water guideline. Based on the geological background and hydrogeochemical analysis, in Datong and Yinchuan basins and part of the North China Plain, the main types of groundwater are soda water and controlling processes of F enrichment are salinization, mineral dissolution, and desorption. In Taiyuan and Guide basins with Cl-Na water type, F enrichment is mainly affected by salinization, cation exchange, and evaporation. The hydrogeochemical characteristics of high F groundwater in Tarim and Junggar basins reflect the extent of salinization and weathering dissolution of minerals in groundwater. According to PCA, the contribution of salinization and mineral dissolution to F enrichment is relatively high. Under the alkaline condition, groundwater with high Cl, HCO, and Na concentration favors F enrichment. Based on HCA, index clustering category I explains the influence of pH and buried depth on F enrichment, and category II explains the effect of different ions. It is concluded that F enrichment in groundwater is related to hydrogeochemical processes and hydrogeological conditions. The hydrogeochemical and alkaline conditions of groundwater are regulated by mineral dissolution, ion exchange, and evaporation, resulting in different degrees of F enrichment.
PMID: 32638308 [PubMed - as supplied by publisher]
印刷用ページを開く Endnote用テキストダウンロード