Activated Carbon and/or Ozone Treatments by Endocrine Disruptors in Tap Water

自来水中内分泌干扰物的活性炭和/或臭氧处理

• 批准号: 12680581
• 负责人: TANADA Seiki
• 金额: $ 1.47万
• 依托单位: Kinki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12680581/
• 关键词: Endocrine disruptors; Ozone treatment; Cyclodextrin; Activated carbon treatment; Decomposition; Inclusion; Adsorption; 高度処理; 環境ホルモン; 内分泌撹乱物質

The recycling of organic by-products has attracted much interest. In this paper, techniques for producing carbonaceous adsorbents from an organic by-product and the application to removal of endocrine disruptors are described. Cottonseed shell as an organic by-products was carbonized at 873 K, and the cottonseed shell char was then activated in a rotary kiln with steam at 1 123 K for different times to obtain microporous carbons. The specific surface area of the carbons obtained was nearly equal to those of commercial activated carbons. The amount of 4-nonylphenol adsorbed at equilibrium concentration above 20 g/L was high for the carbon with high specific surface area. The adsorption amount at extremely low concentration such as 1 g/L was high for the carbon with small mean pore diameter. Microporous carbons were produced next by air activation from cottonseed shell in the one-step treatment. Although the specific surface area of the carbon was small, the pore size was adequate for ad … More sorbing 4-nonylphenol at low concentration. Therefore 4-nonylphenol could be efficiently removed from aqueous solution.The solubility of 4-nonylphenol and bisphenol A in cyclodextrins (CD's) solutions were investigated to evaluate them for water pollution. The relative aqueous-phase concentration of 4-nonylphenol and bisphenol A linearly increased with the increasing CD concentration. As the inner core of 0-CD is the most hydrophobic, the addition of 3-CD (degree of substitution 0.6) produced the largest change. The relative solubility of 4-nonylphenol in the CD solutions depended upon the cavity diameter and the degree of substitution for CD.Ozone and activated carbon treatments have been using for removing organic compounds and foul odor compounds from tap water. As the inclusion complexes moved into the groundwater, the ozone degradation of the inclusion complexes was estimated. The 4-nonylphenol-CD and bisphenol A-CD inclusion complexes were easily degraded by ozone. The degree of degradation increased with the increasing ozonization time. Weakly acidic compounds were produced from the 4-nonylphenol-CD and bisphenol A inclusion complexes by ozonization. CD 's could be utilized for the removal of 4-nonylphenol from tap water. Less

有机副产品的回收利用引起了人们的极大兴趣。本文介绍了利用有机副产物制备碳质吸附剂的技术及其在去除内分泌干扰物中的应用。将棉籽壳作为有机副产物，在873 K的高温下进行炭化，然后在1 123 K的蒸汽回转窑中进行不同时间的活化，得到微孔碳。所得活性炭的比表面积与工业活性炭的比表面积基本相等。当碳的平衡浓度大于20 g/L时，4-壬基苯酚的吸附量较高。对于平均孔径较小的碳，在极低浓度（1 g/L）下吸附量较高。以棉籽壳为原料，采用一步法空气活化法制备微孔炭。虽然碳的比表面积很小，但在低浓度下，其孔径足以吸附更多的4-壬基酚。因此，4-壬基酚可以有效地从水溶液中去除。研究了4-壬基酚和双酚A在环糊精溶液中的溶解度，评价了它们对水污染的影响。4-壬基酚和双酚A的相对水相浓度随CD浓度的增加而线性增加。由于0-CD的内核最疏水，3-CD的加入（取代度0.6）产生的变化最大。4-壬基酚在CD溶液中的相对溶解度取决于空腔直径和CD的取代程度。臭氧和活性炭处理已被用于去除自来水中的有机化合物和恶臭化合物。随着包裹体进入地下水，估计了包裹体对臭氧的降解。4-壬基苯酚- cd和双酚A-CD包合物容易被臭氧降解。随着臭氧化时间的延长，降解程度增加。4-壬基苯酚- cd和双酚A包合物通过臭氧氧化制得弱酸性化合物。CD可用于自来水中4-壬基酚的去除。少

项目成果

Tanada Seiki et al: "Removal of 4-nonylphenol by carbonaceous materials produced from cottonseed shell as organic by-products"Environ. Sci. 13. 580-585 (2000)

Tanada Seiki 等人：“通过棉籽壳作为有机副产品生产的碳质材料去除 4-壬基苯酚”Environ。

S.Tanada et al.: "Trihalomethane removal by activated carbon fiber"Journal of Environmental Science and Health. A36. 1301-1310 (2001)

S.Tanada 等人：“活性碳纤维去除三卤甲烷”环境科学与健康杂志。

S.Tanada et al.: "Relationship between surface-modified activated carbons and volatile chlorinated hydrocarbon"Toxicological and Environmental Chemistry. 77. 151-158 (2000)

S.Tanada 等人：“表面改性活性炭与挥发性氯化烃之间的关系”毒理学和环境化学。

S.Tanada et al.: "Removal of bisphenol A in soil by cyclodextrin derivatives"Toxicological and Environmental Chemistry. 79. 23-29 (2001)

S.Tanada 等人：“环糊精衍生物去除土壤中的双酚 A”毒理学和环境化学。

Tanada Seiki et al.: "Removal of bisphenol A in soil by cyclodextrin derivatives"Toxicol. Environ. Chem.. 79. 23-29 (2001)

Tanada Seiki 等：“环糊精衍生物去除土壤中的双酚 A”Toxicol。