Solubility of pb is minimum in
Answers
Answer:
Lead compounds are generally soluble in soft, slightly acidic water.
Answer:
Determination of matrix alkalinity and lead solubility from the matrix as a function of pH was carried out using modifications of the Acid Neutralization Capacity leach test [6]. RU samples were crushed and jar milled until > 85% passed through a 300 μm sieve. In parallel, ten 5 g aliquots of the size-reduced matrix were extracted using nitric acid solutions of varying acidity. Deionized water and nitric acid were added in varying proportion to each 5 g sample to achieve acid additions ranging from 0 to 10 meq/g solid and a final liquid addition of 30 ml (liquid to solid (LS) ratio of 6:1 ml/g). Each case was carried out in triplicate. After liquid addition, the mixtures were agitated for 24 hr. Subsequently, the solid and liquid phases were separated using vacuum filtration through 0.45 μm pore size polypropylene filters. The filtered extract was analyzed for pH and lead.