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蚯蚓粪便生物炭对水体中雌二醇的吸附

巫林 刘颖 李燕 沈飞 杨刚 伍钧

巫林, 刘颖, 李燕, 沈飞, 杨刚, 伍钧. 蚯蚓粪便生物炭对水体中雌二醇的吸附[J]. 环境科学研究, 2016, 29(10): 1537-1545.
引用本文: 巫林, 刘颖, 李燕, 沈飞, 杨刚, 伍钧. 蚯蚓粪便生物炭对水体中雌二醇的吸附[J]. 环境科学研究, 2016, 29(10): 1537-1545.
WU Lin, LIU Ying, LI Yan, SHEN Fei, YANG Gang, WU Jun. Removal of 17β-Estradiol from Aqueous Solutions by Vermicompost-Derived Biochars Adsorption[J]. Research of Environmental Sciences, 2016, 29(10): 1537-1545.
Citation: WU Lin, LIU Ying, LI Yan, SHEN Fei, YANG Gang, WU Jun. Removal of 17β-Estradiol from Aqueous Solutions by Vermicompost-Derived Biochars Adsorption[J]. Research of Environmental Sciences, 2016, 29(10): 1537-1545.

蚯蚓粪便生物炭对水体中雌二醇的吸附

基金项目: 四川省科技支撑计划项目(2014NZ0045,2015SZ0007);国家自然科学基金项目(21306120)

Removal of 17β-Estradiol from Aqueous Solutions by Vermicompost-Derived Biochars Adsorption

  • 摘要: 为寻求高效、廉价的E2(雌二醇激素)吸附剂及开拓蚯蚓粪便的资源化利用途径,将蚯蚓粪便在300、500和700 ℃下热解碳化制备生物炭(分别记为BC300、BC500和BC700),对所得生物炭的基本理化性质(包括物质组成、表面官能团、孔隙结构等)进行分析,并将其用于吸附水体中E2,考察生物炭投加量、溶液pH、反应时间及初始ρ(E2)对生物炭吸附性能的影响,并探讨了吸附机理.结果表明:随热解温度的升高,生物炭的H/C(原子比)由0.13降至0.03,O/C(原子比)由0.46降至0.02,芳香性增强,极性降低,逐渐由脂肪炭结构过渡到芳香炭结构;生物炭比表面积由24.33 m2/g增至76.29 m2/g,总孔体积由0.09 cm3/g增至0.19 cm3/g.不同热解温度下制备的生物炭对E2的吸附过程均符合准二级动力学方程,拟合系数大于0.991;Langmuir和Freundlich等温吸附模型均能较好地描述蚯蚓粪便生物炭对E2的吸附过程,Langmuir理论最大吸附量表现为BC700(7.66 mg/g)>BC500(5.23 mg/g)>BC300(3.32 mg/g).随热解温度的升高,O/C和H/C降低,说明碳化程度增强,生物炭吸附E2的分配作用减弱而表面吸附作用增强.研究显示,蚯蚓粪便生物炭对E2的吸附效果随比表面积和孔体积的增加而增强.

     

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  • 收稿日期:  2015-12-12
  • 修回日期:  2016-06-02
  • 刊出日期:  2016-10-25

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