Research trends in electrochemical technology for water and wastewater treatment

Abstract

It is difficult to completely degrade wastewater containing refractory pollutants without secondary pollution by biological treatment, as well as physical-chemical process. Therefore, electrochemical technology has attracted much attention for its environmental compatibility, high removal efficiency, and potential cost effectiveness, especially on the industrial wastewater treatment. An effective bibliometric analysis based on the Science Citation Index Core Collection database was conducted to evaluate electrochemical technology for water and wastewater treatment related research from 1994 to 2013. The amount of publications significantly increased in the last two decades. Journal of the Electrochemical Society published the most articles in this field with a top h-index of 90, taking 5.8 % of all, followed by Electrochimica Acta and Journal of Electroanalytical Chemistry. The researchers focused on categories of chemistry, electrochemistry, and materials science. China and Chinese Academy of Sciences were the most productive country and institution, respectively, while the USA, with the most international collaborative articles and highest h-index of 130, was the major collaborator with 15 other countries in top 20 most productive countries. Moreover, based on the analysis of author keywords, title, abstract, and 'KeyWords Plus', a new method named ''word cluster analysis'' was successfully applied to trace the research hotspot. Nowadays, researchers mainly focused on novel anodic electrode, especially on its physiochemical and electrochemical properties.

A bibliometric analysis of micro/nano-bubble related research: current trends, present application, and future prospects

“…Bibliometric methods have been used to assess the scientific outputs of nano-technology field, such as global nanobiotechnology research (Karpagam 2014), carbon nanostructures (Terekhov 2015), nanofiltration membrane technology (Zhai et al 2014), and nanotechnology for social needs: contributions from Latin American research in the areas of health, energy and water (Invernizzi et al 2015). In addition, research patterns including journals, categories, countries, and institutes, as well as the international cooperation had been broadly applied Wang et al 2015;Zheng et al 2015a). Moreover, h-index, namely the number h of publications with at least h citations, which was introduced by Hirsch (2005), had become a valid indicator on scientific achievement (Hirsch 2007;Ciriminna and Pagliaro 2013).…”

Remediation of COD and color from textile wastewater using dual stage electrocoagulation process

“…Further increase in current density from 120 to 165 A/m 2 , the rate of color removal efficiency slowed down and almost became same. Zheng et al [34] also studied electrochemical treatment process for the treatment of wastewater and found a similar trend. At current density of 165 A/m 2 , the maximum removal efficiency increases to 81.92%, because at higher current density, the amount of anodic dissolution of aluminum increases, resulting in a superior amount of precipitate and removal of organics.…”

Study on the Degradation of Oilfield Wastewater Treatment by Three-Dimensional Electrode

“…It improves mass transfer effect, and further improves the electrochemical reaction efficiency, the structure of the three-dimensional electrode is shown in Figure 2. The reaction mechanism is still the electrochemical degradation reaction [9] [10], active oxides are produced in the reaction process to form a dynamic process of adsorption-electrolysis-desorption. The existence of electrode particles improves specific surface area and adsorption capacity of the electrodes, electrode particles are charged due to induction in the electric field, so both sides of electrode particle present positive and negative poles to form a number of micro-electrolysis cells, then the electrochemical oxidation and reduction reaction occurs.…”