This paper examines the efficiency of electro-oxidation used as the single pretreatment of landfill leachate. The experiments were performed on three different types of leachate. The results obtained using this electrochemical method results were analyzed after seven days of treatment. The main characteristics of leachate and a diagram of the experimental apparatus are presented. The overall ob...

Persons working in nickel refineries, arsenic smelters and chrome plating factories are exposed to chromium compounds. Hexavalent chromium has been implicated for its toxic effects on the nasal mucosa. Detailed data of 108 workers, dealing in manufacturing of Chrome and its compounds, was collected concerning age, occupational history and clinical examination. Of the 108 cases, 52 cases had nas...

Hexavalent chromium as K2Cr2O7 (60mg/kgb.w) was administered intraperitoneally to male Sprague Dawley rats. In the thyroid gland, chromium concentration decreased significantly (P<0.01) as compared to the control tissue. Serum FT3 and FT4 levels decreased significantly (P<0.01 and P<0.001 respectively), while serum TSH concentration increased significantly (P< 0.01) than the control. Histologic...

Arsenic and hexavalent chromium toxicity results from their ability to interact with sulfahydryl groups of proteins and enzymes, and to substitute phosphorus in a variety of biochemical reactions. Alanine aminotransferase (ALT; E.C: 2.6.1.2) and Aspartate amino transferase (AST; EC 2.6.1.1) play a crucial role in transamination reactions and can be used as potential biomarkers to indicate hepat...

Marine seaweed (Eucheuma sp.) associated strains of Aspergillus flavus and Aspergillus niger were tested for their Cr(VI) tolerance. Both the isolates showed luxuriant growth in different concentrations of Cr(VI), i.e., 25, 50 and 100 ppm. There was no marked variation in the dry weight of control and test isolates, which indicated that both the isolates can tolerate a wide range of hexavalent ...

For commercial applications, specially formulated conversion coating treatments based on chromates and phosphates have been used extensively to prevent rapid Zn dissolution in aerospace, food processing and automobile industries. Chromate coatings are favored due to their barrier and corrosion resistance properties. Chromium deposition is obtained from hexavalent Cr salt baths, which are subjec...