标題：IRON ELECTROCOAGULATION WITH ENHANCED CATHODIC REDUCTION FOR THE REMOVAL OF AQUEOUS CONTAMINANT MIXTURES作者：Mao, Xuhui; Baek, Kitae; Alshawabkeh, Akram N.

來源出版物：ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL 卷：14 期：12 頁：2905-2911 出版年：DEC 2015

摘要：This study presents enhanced reduction of soluble contaminants in a modified electrocoagulation process that is capable of treating a mixture of aqueous contaminants. By incorporating an iron foam cathode, the process can remove aqueous trichloroethylene (TCE) by 99.1% and nitrate ions by 98.2%, which represents 58.1 and 20 percent higher than the removal rates achieved by iron plate cathode, respectively. pH and ORP measurements indicate the development of a reducing electrolyte condition due to the ferrous generation from an iron anode, which facilitates the reduction of soluble contaminants because the competition from O-2 reduction is eliminated in the system. Both iron foam and vitreous carbon foam electrodes are compatible with polarity reversal, without any deterioration in the efficiency of electroreduction of TCE and nitrate. The modified iron electrolysis process demonstrates versatility for the treatment of mixtures of contaminants, including a binary mixture of TCE and dichromate, a mixture of selenate and nitrate and a mixture of phosphate and nitrate. The ferrous species generated from the iron anode can reduce and (or) co-precipitate certain aqueous contaminants such as dichromate, selenate and phosphate, while the cathodic process can directly reduce contaminants like TCE and nitrate. Compared with the conventional electrocoagulation system that consists of two planar electrodes, the proposed process is not only more effective, but also suitable for the development of integrated and versatile process for the treatment of co-contaminated wastewater or groundwater.

入藏号：WOS:000369100100017

文獻類型：Article

語種：English

作者關鍵詞：electrochemical reduction, iron foam cathode, modified electrocoagulation, soluble contaminants

擴展關鍵詞：WASTE-WATER; CHLORINATED HYDROCARBONS; COD REDUCTION; DECHLORINATION; TRICHLOROETHYLENE; ELECTRODE; TCE; BATCH; DEHALOGENATION; DECOMPOSITION

通訊作者地址：Alshawabkeh, AN, Northeastern Univ, Civil & Environm Engn Dept, Boston, MA 02115 USA.

電子郵件地址：aalsha@coe.neu.edu

地址：

[Mao, Xuhui] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

[Mao, Xuhui; Baek, Kitae; Alshawabkeh, Akram N.] Northeastern Univ, Civil & Environm Engn Dept, Boston, MA 02115 USA.

[Baek, Kitae] Chonbuk Natl Univ, Dept Environm Engn, Jeonju 561756, South Korea.

研究方向：Environmental Sciences & Ecology

ISSN：1582-9596

eISSN: 1843-3707

影響因子（2014）：1.065