Open AccessCalcareous and Gypsum Soils Lead Removal Using Two-Steps Washing
Author(s) -
Hazim Aziz Al-Robai,
Ameer Hazim Azeez Al-Rubay,
Ghaith Salah Al-Mamoori,
Ali Akram Abdulateef
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/910/1/012136
Subject(s) - gypsum , calcareous , soil water , contamination , soil test , environmental chemistry , soil contamination , environmental science , chemistry , mineralogy , metallurgy , soil science , geology , materials science , ecology , paleontology , biology
The soil washing technique is considered one of the quick and effective techniques for treating soil contaminated with heavy metals. In this study, EDTA-Na 2 and Oxalic were used as washing solutions to removing Pb from calcareous and gypsum soils contaminated with Pb only and with Pb in addition to the used engine oil. The soil samples were contaminated with different concentrations of Pb only using Pb(NO 3 ) 2 to soils sample for each concentration separately then the sample was divided into two equal parts. The first part represents the calcareous and gypsum soil samples contaminated with Pb. The second part was taken after air-dried, and then the used engine oil was added and homogenized well. Five parameters (pH, contact time, Pb concentrations, temperature, and liquid/solid ratio) were applied to test their effect on Pb removal. In general, the results of this study varied based on the effect of the variables.