Removal of 1,4-dioxane from landfill leachate by a rotating advanced oxidation contactor equipped with activated carbon/TiO2 composite sheets
Removal of 1,4-dioxane from landfill leachate by a rotating advanced oxidation contactor equipped with activated carbon/TiO2 composite sheets
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DOI：
10.1016/j.jhazmat.2019.121005
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发表时间：
2020-02-05
影响因子：
13.6
通讯作者：
Fujiwara, Taku
中科院分区：
文献类型：
--
作者：
Nomura, Youhei;Fukahori, Shuji;Fujiwara, Taku
采用活性炭（AC）/TiO 2复合膜为填料的旋转式高级氧化反应器（RAOC）对垃圾渗滤液生物处理后的1，4-二氧六环进行了去除研究。通过评价在纯水（PW）和BTLL中的去除效率，将RAOC在1，4-二氧六环去除中的性能与TiO 2浆料反应器的性能进行比较。在TiO 2浆态反应器中，由于BTLL中共存物质的强烈抑制作用，BTLL中1，4-二氧六环在66 h的处理过程中几乎没有降解。相比之下，在处理66 h期间，RAOC通过吸附成功地从BILL中去除了89%的1，4-二氧六环，通过吸附去除了81%的1，4-二氧六环。RAOC降解BTLL和PW中1，4-二氧六环的速率常数之比TiO 2浆态反应器高两个数量级。这表明RAOC大大减轻了BTLL中共存物质的抑制作用。在BTLL中由RAOC降解1，4-二氧六环所需的电能远低于由TiO 2浆料反应器降解所需的电能。结果表明，采用AC/TiO 2复合片的RAOC能有效去除BTLL中的1，4-二氧六环。
A rotating advanced oxidation contactor (RAOC) equipped with activated carbon (AC)/TiO2 composite sheets for 1,4-dioxane removal from biologically treated landfill leachate (BTLL) was developed. The performance of the RAOC in 1,4-dioxane removal was compared to that of a TiO2 slurry reactor by evaluating the removal efficiencies in pure water (PW) and the BTLL. In the TiO2 slurry reactor, 1,4-dioxane was hardly degraded in the BTLL during 66 h of treatment because of strong inhibition by coexisting substances in the BTLL. In contrast, the RAOC successfully removed 1,4-dioxane from the BILL by 89% through adsorption and by 81% through photocatalysis during treatment for 66 h. The ratio of the rate constants for degrading 1,4-dioxane in the BTLL and PW by the RAOC was two orders of magnitude higher than that for a TiO2 slurry reactor. This shows that the RAOC greatly mitigated the inhibition by coexisting substances in the BTLL. The electrical energy required for 1,4-dioxane degradation in the BTLL by the RAOC was much lower than that required for degradation by the TiO2 slurry reactor. The results show that the RAOC equipped with AC/TiO2 composite sheets effectively removed 1,4-dioxane from BTLL.