Leaching of Mercury from Solids
نویسنده
چکیده
Fig. 1. An engineering technologist sets up an apparatus in which PCB-contaminated liquid will be exposed to chemicals which remove the chlorine from the compound, transforming the PCBs into non-regulated chemicals. Base-catalyzed destruction (BCD) of polychlorinated biphenyls (PCBs) is a process in which the halogen molecules on PCBs are replaced with aliphatic hydrocarbons (or in some cases hydrogen) to convert the PCB into a harmless compound. The BCD technology has been demonstrated on a large scale by the Environmental Protection Agency and was shown to be an efficient treatment for highly PCB-contaminated transformer oils.
منابع مشابه
Leaching of major and trace elements from paper-plastic gasification chars: an experimental and modelling study.
The control of soluble metal species in the sub-product leachate generated in electricity production processes is of great concern from an environmental and health point of view. Unlike fly ash, the leaching behaviour of char materials has received little attention. Yet, these solids are captured together with fly ashes in the particle control devices of power plants and are emitted in the same...
متن کاملIron leaching from bauxite ore in hydrochloric acid using response surface methodology
In this work, hydrochloric acid is used to remove iron impurities in the bauxite ore contained in the diasporite mineral located in the Sari region. The bauxite ore was calcined at different temperatures and times, and then dissolved in a hydrochloric acid solution. After determining the optimum calcination conditions in 1 h at 900 °C, the response surface methodology (RSM) with four factors in...
متن کاملIntensification Behavior of Mercury Ions on Gold Cyanide Leaching
Cyanidation is the main method used to extract gold from gold raw materials; however, a serious problem with this method is the low leaching rate. In order to improve gold leaching, the intensification behavior of mercury ions on gold cyanide leaching, for two types of materials, sulphide gold concentrate and oxide gold ore, was investigated. The results showed that mercury ions, with only a 10...
متن کاملLeaching characteristics of heavy metals from sewage sludge by Acidithiobacillus thiooxidans MET.
An acidophilic, sulfur-oxidizing Acidithiobacillus thiooxidans MET bacterium was isolated from anaerobically digested, dewatered sewage sludge. This bacterium showed sulfur-oxidizing ability at both acidic and neutral conditions, and allowed metal leaching even at a high (130 g L(-1)) sludge solids concentration. We found that low metal leaching efficiency at high solids concentration was mainl...
متن کاملStudy on the Leaching of Mercuric Oxide with Thiosulfate Solutions
Mercury is receiving more concern due to its high mobility and high toxicity to human health and the environment. Restrictive legislations and world-wide efforts have been made on mercury control, especially the release and disposal of mercury-contaminated wastes. This paper describes a novel technology for detoxifying mercury-containing solid wastes with thiosulfate salts. Various parameters w...
متن کامل