ABSTRACT
The high concentration of trivalent chromium along with organic/inorganic compounds in chrome buffing dust (CBD), the solid waste discharged from leather industries, causes severe groundwater contamination on land co-disposal and chronic air pollution during thermal incineration. In the present investigation, CBD was subjected to starved air incineration (SAI) at 800 degrees C in a thermal incinerator under different flow rates of oxygen to optimize the oxygen required to incinerate the organic compounds and simultaneously preventing the conversion of Cr(3+) to Cr(6+). The energy audit of SAI of buffing dust under the external supply of oxygen was carried out under different incineration conditions. The bottom ash from SAI was effectively solidified/stabilized using Portland cement and fine aggregate. The solidified blocks were tested for unconfined compressive strength and heavy metal leaching. Unconfined compressive strength of the blocks was in the range of 120-180 kg/cm(2). The stabilization of chromium(III) in the cement gel matrix was confirmed using Scanning Electron Microscopy SEM, Electron Paramagnetic Resonance spectroscopy (EPR) and X-ray diffraction spectroscopy (XRD). Leachability studies through TCLP on solidified blocks were carried out to determine the degree of leaching of chromium and organic compounds (expressed as COD) under standard conditions.
Subject(s)
Chromium/toxicity , Dust , Tanning , Waste Management/methods , Adsorption , Chromium/chemistry , Hazardous Waste , Incineration , Industrial Waste , Microscopy, Electron, Scanning , TemperatureABSTRACT
An 18-year-old female patient with miliary tuberculosis presented with bilateral, simultaneous pneumothoraces, which were recurrent with a bronchopleural fistula. The recurrent pneumothoraces were managed with tube thoracostomy and pleurodesis. Various possible pathogenetic mechanisms of this rare complication are discussed.
Subject(s)
Pneumothorax/etiology , Tuberculosis, Miliary/complications , Tuberculosis, Pulmonary/complications , Adolescent , Bronchial Fistula/etiology , Female , Fistula/etiology , Humans , Pleural Diseases/etiology , RecurrenceABSTRACT
A case of claustrophobia in a 45-year old male tuberculous in-patient receiving antituberculous drug is reported. The patient presented with the clinical features of claustrophobia after eighteen months of therapy. Isoniazid was, probably, the most likely cause since. The symptoms recurred on reintroduction of INH containing regimens. There was no recurrence of symptoms on resumption of non-Isoniazid regimen. Neurop3ychi.-Uric side-effects due to Isoniazid are well-known but Phobic neurosis due to Isoniazid was not reported till now.
