Combined electrochemical and biological treatment of industrial wastewater using porous electrodes

Simultaneous removal of metal ions and linear alkylbenzene sulfonate by combined electrochemical and photocatalytic process

“…5, the removal rate constant increased about 15% and 68% for Ni ++ and Zn ++ , respectively, when the liquid rate was increased from 0.0021 to 0.017 m 3 m −2 s −1 . The rate constants obtained in the present study with a rectangular electro-cell are comparable to the rate constants of 0.0201 and 0.0365 h −1 for Ni ++ and Zn ++ , respectively, obtained at a liquid rate of 0.0137 m 3 m −2 s −1 in our previous study using a cylindrical flow-through cell with porous electrodes [18]. However, the mass transfer coefficients for Ni ++ and Zn ++ in the present study are higher than those with porous electrodes.…”

“…In the present study, the variation of the metal ion concentration with the treatment time exhibited an exponential decay, indicating that the removal of metal ions followed a first-order kinetics that can be expressed as [18]: Integration of Eq. (1) gives:…”

The effect of solids on the electrochemical treatment of olive mill effluents

“…Electro‐oxidation over anodes made of graphite, Pt, TiO 2 , IrO 2 , PbO 2 , several Ti‐based alloys and, more recently, boron‐doped diamond, has been employed for the decontamination of various streams. Recent studies have dealt with the treatment of effluents containing textile dyes,12, 13 aquaculture effluents,14 cyanide effluents,15 infiltration waters taken from contaminated industrial sites and containing aromatics,16 effluents from electrocoating processes containing heavy metals and paint solvers17 and hospital effluents containing endocrine‐disrupting compounds 18. Depending on the electrodes employed, the wastewater matrix and the use of chemicals or gases added to the effluent, electrochemical oxidation may be accomplished via several pathways, namely: (i) direct combustion of pollutants on the anode, (ii) the oxidative action of chlorine, hypochlorite, hydrogen peroxide and ozone that may be generated electrochemically and (iii) the catalytic action of iron that may leach in the reaction mixture from a sacrificial iron anode, thus mimicking a Fenton reaction.…”

Removal of Nickel from Aqueous Solution by Nano Hydroxyapatite Originated from Persian Gulf Corals

“…In order to evaluate of temperature effect on the nickel uptake, adsorption experiments were conducted on three different temperatures (25,40 and 60 ˚C) with 6 g/L adsorbent concentration. Fig.…”

“…Furthermore, many researchers have proposed that a swelling effect happened within the internal structure of adsorbent by increasing of temperature, which is caused further ions penetration into the adsorbent structure [25,26].…”