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Ge Siyi1, Zhou Hong1, Song Jia2, Yu Jia1, Wei Wei1, Li Shiyin1,*. Interaction between Humic Acid and p-Arsanilic Acid Using Fluorescence Quenching Approach[J]. 生态毒理学报, 2017, 12(3): 667-674
Interaction between Humic Acid and p-Arsanilic Acid Using Fluorescence Quenching Approach
Interaction between Humic Acid and p-Arsanilic Acid Using Fluorescence Quenching Approach
投稿时间:2016-12-26  修订日期:2017-03-13
DOI:10.7524/AJE.1673-5897.20161227002
中文关键词:  p-arsanilic acid  humic acid  fluorescence quenching  dissolved organic matter  FTIR
英文关键词:p-arsanilic acid  humic acid  fluorescence quenching  dissolved organic matter  FTIR
基金项目:National Natural Science Foundation of China (41373111)
作者单位
Ge Siyi1, Zhou Hong1, Song Jia2, Yu Jia1, Wei Wei1, Li Shiyin1,* 1. School of Environment, Nanjing Normal University, Nanjing 210023, China 2. School of Geographical Science, Nanjing Normal University, Nanjing 210023, China 
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中文摘要:
      p-arsanilic acid (p-ASA), as a kind of organoarsenic feed additive, has been widely used in poultry and swine breeding. However, it has caused the arsenic pollution around the farm. Currently data shows humic acid (HA) is closely to the migration and transformation of p-ASA. Therefore, the interaction between p-ASA and HA was investigated by using the method of fluorescence quenching titration. The association constant changed from 2.74 to 4.88 L mol-1 at a pH varying from 5 to 9 and reached the maximum at pH 7. In addition, logK varied from 4.15 to 5.02 L mol-1 when the temperature increased from 15 ℃ to 35 ℃. The logK increased with an increase in the concentration of HA. The dominant mechanism between p-ASA and HA is static quenching. The primary interaction force was likely the hydrogen bond, and the binding behavior occurred on the As-O stretch of p-ASA and the carboxylic acid C=O stretch of HA. The results showed that dissolved organic matters could affect the fate and biogeochemical cycling of organoarsenic pharmaceuticals in aquatic ecosystems.
  
AuthorAffiliation
Ge Siyi1, Zhou Hong1, Song Jia2, Yu Jia1, Wei Wei1, Li Shiyin1,*1. School of Environment, Nanjing Normal University, Nanjing 210023, China 2. School of Geographical Science, Nanjing Normal University, Nanjing 210023, China
英文摘要:
      p-arsanilic acid (p-ASA), as a kind of organoarsenic feed additive, has been widely used in poultry and swine breeding. However, it has caused the arsenic pollution around the farm. Currently data shows humic acid (HA) is closely to the migration and transformation of p-ASA. Therefore, the interaction between p-ASA and HA was investigated by using the method of fluorescence quenching titration. The association constant changed from 2.74 to 4.88 L mol-1 at a pH varying from 5 to 9 and reached the maximum at pH 7. In addition, logK varied from 4.15 to 5.02 L mol-1 when the temperature increased from 15 ℃ to 35 ℃. The logK increased with an increase in the concentration of HA. The dominant mechanism between p-ASA and HA is static quenching. The primary interaction force was likely the hydrogen bond, and the binding behavior occurred on the As-O stretch of p-ASA and the carboxylic acid C=O stretch of HA. The results showed that dissolved organic matters could affect the fate and biogeochemical cycling of organoarsenic pharmaceuticals in aquatic ecosystems.
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