标题：Disilicate-Assisted Iron Electrolysis for Sequential Fenton-Oxidation and Coagulation of Aqueous Contaminants

作者：Cui, JX (Cui, Jiaxin); Wang, X (Wang, Xu); Zhang, J (Zhang, Jing); Qiu, XY (Qiu, Xiaoyu); Wang, DH (Wang, Dihua); Zhao, Y (Zhao, Ying); Xi, BD (Xi, Beidou); Alshawabkeh, AN (Alshawabkeh, Akram N.); Mao, XH (Mao, Xuhui)

来源出版物：ENVIRONMENTAL SCIENCE & TECHNOLOGY卷：51期：14 页码：8077-8084 DOI：10.1021/acs.est.7b01184 出版年：JUL 18 2017

摘要：Sodium disilicate (SD), an inorganic and environmentally friendly ligand, is introduced into the conventional iron electrolysis system to achieve an oxidizing Fenton process to degrade organic pollutants. Electrolytic ferrous ions, which are complexed by the disilicate ions, can chemically reduce dioxygen molecules via consecutive reduction steps, producing H2O2 for the Fenton-oxidation of organics. At the near-neutral pH (from 6 to 8), the disilicate Fe(II) complexes possess strong reducing capabilitie; therefore a near-neutral pH rather than an acid condition is preferable for the disilicate-assisted iron electrolysis (DALE) process. Following the DALE process, the different complexing capacities of disilicate for ferrous/ferric ions and calcium ions can be used to break the disilicate iron complexes. The addition of CaO or CaCl2 can precipitate ferrous/ferric ions, disilicates and possibly heavy metals in the wastewater. Compared to previously reported organic and phosphorus ligands, SD is a low-cost inorganic agent that does not lead to secondary pollution, and would not compete with the target organic pollutants for center dot OH; therefore, it would greatly expand the application fields of the O-2 activation process. The combination of DALE and CaO treatments is envisioned to be a versatile and affordable method for treating wastewater with complicated pollutants (e.g., mixtures of biorefractory organics and heavy metals).

入藏号：WOS:000406086100036

文献类型：Article

语种：English

扩展关键词： Plus: WASTE-WATER TREATMENT; FERROUS-TETRAPOLYPHOSPHATE COMPLEX; MOLECULAR-OXYGEN; NEUTRAL PH; HYDROXYL RADICALS; DEGRADATION; CATHODE; SYSTEM; CARBON; MECHANISM

通讯作者地址：Mao, XH (通讯作者),Wuhan Univ, Sch Resources & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

电子邮件地址：clab@whu.edu.cn

地址：

[Cui, Jiaxin; Wang, Xu; Zhang, Jing; Qiu, Xiaoyu; Wang, Dihua; Mao, Xuhui] Wuhan Univ, Sch Resources & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

[Zhao, Ying; Xi, Beidou] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China.

[Alshawabkeh, Akram N.] Northeastern Univ, Civil & Environm Engn Dept, Boston, MA 02115 USA.

研究方向：Engineering; Environmental Sciences & Ecology

ISSN：013-936X

eISSN: 1520-5851

影响因子：6.198