November 21, 2018

Ali Ciblak Coauthors Paper on Degradation of Chlorobenzene in Groundwater in the Journal Chemosphere

Ali Ciblak, Ph.D. (Georgia) coauthored a paper entitled "Immobilized Palladium-catalyzed Electro-Fenton's Degradation of Chlorobenzene," published in the Chemosphere journal on October 22, 2018.

His coauthors were Roya Nazari, Ljiljana Rajić, Sebastián Hernández, Ibrahim E. Mousa, Wei Zhou, Dibakar Bhattacharyya, and Akram N. Alshawabkeh.

Ali is a groundwater remediation professional based in Georgia with more than seven years of experience focused on the assessment, selection, and implementation of remedial actions for contaminated sites and treatment technologies. He has designed and successfully implemented several remedial technologies to help his clients, primarily in the northeastern United States. These remedial technologies include air sparging/soil vapor extraction (AS/SVE), in situ chemical oxidation and reduction (ISCO & ISCR), enhanced in situ bioremediation (EISB), biosparging and in situ stabilization/solidification (ISS).

Chemosphere is an international journal designed for the publication of original communications and review articles. As a multidisciplinary journal, Chemosphere offers broad and impactful dissemination of investigations related to all aspects of environmental science and engineering.


This study investigates the effect of palladium (Pd) form on the electrochemical degradation of chlorobenzene in groundwater by palladium-catalyzed electro-Fenton (EF) reaction. In batch and flow-through column reactors, EF was initiated via in-situ electrochemical formation of hydrogen peroxide (H2O2) supported by Pd on aluminapowder or by palladized polyacrylic acid (PAA) in a polyvinylidene fluoride (PVDF) membrane (Pd-PVDF/PAA). In a mixed batch reactor containing 10 mg L−1 Fe2+, 2 g L−1 of catalyst in powder form (1% Pd, 20 mg L−1 of Pd) and an initial pH of 3, chlorobenzene was degraded under 120 mA current following a first-order decay rate showing 96% removal within 60 min. Under the same conditions, a rotating Pd-PVDF/PAA disk produced 88% of chlorobenzene degradation. In the column experiment with automatic pH adjustment, 71% of chlorobenzene was removed within 120 min with 10 mg L−1 Fe2+, and 2 g L−1 catalyst in pellet form (0.5% Pd, 10 mg L−1 of Pd) under 60 mA. The EF reaction can be achieved under flow, without external pH adjustment and H2O2 addition, and can be applied for in-situ groundwater treatment. Furthermore, the rotating PVDF-PAA membrane with immobilized Pd-catalyst showed an effective and low maintenance option for employing Pd catalyst for water treatment.

More Information

Learn more about the paper: Immobilized palladium-catalyzed electro-Fenton's degradation of chlorobenzene in groundwater.
For consultation regarding degradation of chlorobenzene, contact Ali Ciblak at This email address is being protected from spambots. You need JavaScript enabled to view it..
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