Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lead Removal from Foundry Waste by Solvent Extraction
Solvent extraction is used to reduce lead concentrations from millpond wastewater solids, a type of foundry process waste. Toluene and toluene mixed with di-(2-ethyl-hexyl) phosphoric acid (HDEHP) have been tried as leaching solvents. Toluene is ineffective as a solvent in extracting lead, but the toluene-HDEHP mixture effectively removes lead from solid foundry waste. The effects of the HDEHP concentration, the contact time, and the amount of solvent used on lead extraction have been investigated. The mass transfer process is rapid: contact time of 1/2 hour has been found to be sufficient to accomplish the leaching process. The concentration of HDEHP significantly impacts lead removal. The optimum concentration of HDEHP is determined to range from 0.05 to 0.1 mol/1. The Toxicity Characteristic Leaching Procedure (TCLP) test of the treated samples gives leachable lead in much lower quantities than those found in the untreated samples. Thus the solvent extraction process appears to be an effective method to significantly reduce the lead content of millpond wastewater solids.
Lead Removal from Foundry Waste by Solvent Extraction
Solvent extraction is used to reduce lead concentrations from millpond wastewater solids, a type of foundry process waste. Toluene and toluene mixed with di-(2-ethyl-hexyl) phosphoric acid (HDEHP) have been tried as leaching solvents. Toluene is ineffective as a solvent in extracting lead, but the toluene-HDEHP mixture effectively removes lead from solid foundry waste. The effects of the HDEHP concentration, the contact time, and the amount of solvent used on lead extraction have been investigated. The mass transfer process is rapid: contact time of 1/2 hour has been found to be sufficient to accomplish the leaching process. The concentration of HDEHP significantly impacts lead removal. The optimum concentration of HDEHP is determined to range from 0.05 to 0.1 mol/1. The Toxicity Characteristic Leaching Procedure (TCLP) test of the treated samples gives leachable lead in much lower quantities than those found in the untreated samples. Thus the solvent extraction process appears to be an effective method to significantly reduce the lead content of millpond wastewater solids.
Lead Removal from Foundry Waste by Solvent Extraction
Shah, D.B. (Autor:in) / Phadke, A.V. (Autor:in) / Kocher, W.M. (Autor:in)
Journal of the Air & Waste Management Association ; 45 ; 150-155
01.03.1995
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Extraction of Lead and Chromium from Spent Foundry Sands Using EDTA
| British Library Conference Proceedings | 1994
Extraction of Lead and Chromium from Spent Foundry Sands Using EDTA
| British Library Conference Proceedings | 1994
Utilization of foundry shop waste
| Tema Archiv | 1996
Solvent Extraction of Soils Contaminated with Lead
| British Library Conference Proceedings | 1994
Solvent Extraction of Soils Contaminated with Lead
| British Library Conference Proceedings | 1994