The performance of two ceramic filter candles and one silver-impregnated filter candle with a layer of activated carbon, randomly selected from those... Read more...
This case study, based on interviews with lower caste Tamil women waste pickers in Bangalore from 1989-1990, describes their work, their earnings,... Read more...
Manganese ore (pyrolusite) and iron ore (haematite), both raw and chemically treated with ferric hydroxide, alum, lime, or manganese dioxide, were... Read more...