Track topics on Twitter Track topics that are important to you
The galvanizing industry uses the concentrated hydrochloric acid in its metal surface treatment processes known as pickling. Every year tons of waste acid solutions polluted with metals ions are discharged to the environment after neutralization process. In this study, a novel photoelectrochemical reactor is designed and developed for the production of hydrogen and chlorine gas from spent hydrochloric acid generated in the galvanizing industry. The novel reactor design allows all the hydrogen gas to flow from the reactor without any dead zone in the cathode compartment, while chlorine gas is carried out with aqueous 5 M HCl at the surface of the illuminated photoanode without any dissolution. Further, the unique design of the cathode corrosion-resistant high surface area (3 × the anode) results in good proton and H transfer rate while the TiO coated photoanode further enhances the charge transfer process and chlorine gas production. The characterization of the coated stainless steel is tested by the energy-dispersive X-ray (EDX) analysis and scanning electron microscope (SEM) images. The photoelectrochemical potentiostatic experiments with and without sunlight are performed on the reactor. The hydrogen and chlorine gas production rates are observed as 3 mL/min and 0.5 mL/min, respectively. Also, a comprehensive thermodynamic analysis of the photoelectrochemical reactor is conducted, and energy, exergy, and quantum efficiencies are found as 45.55%, 73.75%, and 6%, respectively. The exergoeconomic assessment study shows that the lowest exergy cost rate is achieved with sunlight illumination for a hydrogen exergy cost of 1.7 $/kg and chlorine exergy cost rate of 0.3 $/kg at an applied potential of 2 V.
This article was published in the following journal.
Name: The Science of the total environment
The autochthonous bacterial strain was isolated from banana waste (BW) for hydrogen production and organic acids from different pure substrates and BW. The potential production of H and metabolic path...
Increased generation of food waste (FW) poses significant risks to the social environment, and therefore it is critical that efficient technology be developed for effective waste valorization. This st...
Antimony, arsenic, cadmium, chlorine, chromium, cobalt, lead, mercury, nickel and their compounds are commonly used in the industrial production of various goods. At the end of the product life cycle,...
Antibiotic fermentation residue produced from pharmaceutical plants has been listed as a "Hazardous Waste", however it contains various substrates which can be used for biofuel production. In this stu...
In order to reveal the chlorine behavior during hydrothermal carbonization (HTC) of medical waste, polyvinyl chloride and medical waste model (MW) were respectively treated by HTC at temperature rangi...
The purpose of this study is to test the use of a smartphone app as a way to measure food waste. Investigators propose to improve the accuracy and convenience of household food waste ...
Previous research has shown the oxidizing properties and microbiological efficacies of chlorine dioxide (ClO2). However, no clinical studies have investigated its microbiological efficacie...
This pilot randomized phase II trial studies who well chlorine dioxide sterilization works in reducing oral mucositis in patients with stage I-IV head and neck cancer who are undergoing ra...
To determine the effectiveness of combining different concentrations of hydrogen peroxide and carbamide used during tooth bleaching.
This study is a placebo-controlled, double-blind trial that will investigate the safety and tolerability of molecular hydrogen, a promising antioxidant agent, in patients with early-stage ...
Worthless, damaged, defective, superfluous or effluent material from industrial operations. It represents an ecological problem and health hazard.
A greenish-yellow, diatomic gas that is a member of the halogen family of elements. It has the atomic symbol Cl, atomic number 17, and atomic weight 70.906. It is a powerful irritant that can cause fatal pulmonary edema. Chlorine is used in manufacturing, as a reagent in synthetic chemistry, for water purification, and in the production of chlorinated lime, which is used in fabric bleaching.
Waste products which, upon release into the atmosphere, water or soil, cause health risks to humans or animals through skin contact, inhalation or ingestion. Hazardous waste sites which contain hazardous waste substances go here.
Liquid, solid, or gaseous waste resulting from mining of radioactive ore, production of reactor fuel materials, reactor operation, processing of irradiated reactor fuels, and related operations, and from use of radioactive materials in research, industry, and medicine. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A process of waste disposal involving the conversion of green waste (i.e. leaves, organic matter, food waste, manure) into soil-enhancing matter.
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...