TY - JOUR
T1 - Changes of biochemical properties and heavy metal bioavailability in soil treated with natural liming materials
AU - Abd El-Azeem, Samy A.M.
AU - Ahmad, Mahtab
AU - Usman, Adel R.A.
AU - Kim, Kwon Rae
AU - Oh, Sang Eun
AU - Lee, Sang Soo
AU - Ok, Yong Sik
N1 - Funding Information:
Acknowledgments This study was supported by Basic Science Research Foundation through the National Research Foundation (NRF) of Korea, funded by the Ministry of Education, Science and Technology (2012R1A1B3001409). This study was also partly supported by the Korea Ministry of Environment as ‘‘The GAIA project’’ in Korea. Instrumental analysis was performed at the Korea Basic Science Institute, the Institute of Environmental Research and the Central Laboratory of Kangwon National University in Korea. Gratitude is expressed to Dr. Hesham Mohamed Abdouat Washington State University who reviewed an early version of the manuscript.
PY - 2013/12
Y1 - 2013/12
N2 - This study evaluated the efficiency of naturally occurring lime-based waste materials (oyster shells, eggshells, and mussel shells) on immobilization of selected heavy metals (Cd and Pb) and a metalloid (As) in a contaminated agricultural soil. A 30-day incubation experiment was performed using soil mixture with natural liming materials or calcite (CaCO3) at 0, 1, 3, 5, and 10 wt %. Soil biochemical properties including pH, electrical conductivity (EC), exchangeable cations, organic matter (OM), total nitrogen (TN), microbial populations, and enzyme activities were determined to ensure the changes in soil quality during incubation. The results showed that the application of natural liming materials led to an increase in soil pH similar to that of CaCO3. Soil concentrations of Cd, Pb, and As extracted with 0.1 or 1 M HCl, and diethylene triamine pentacetic acid (DTPA) were decreased significantly after adding liming materials, accompanied by increased microbial population and enzyme activities of dehydrogenase, phosphatase, β-glucosidase, and arylsulfatase. Additionally, eggshells and mussel shells induced significant increases in OM and TN in the soil. Application of natural liming materials offers a cost-effective way to immobilize heavy metals and metalloids in soils.
AB - This study evaluated the efficiency of naturally occurring lime-based waste materials (oyster shells, eggshells, and mussel shells) on immobilization of selected heavy metals (Cd and Pb) and a metalloid (As) in a contaminated agricultural soil. A 30-day incubation experiment was performed using soil mixture with natural liming materials or calcite (CaCO3) at 0, 1, 3, 5, and 10 wt %. Soil biochemical properties including pH, electrical conductivity (EC), exchangeable cations, organic matter (OM), total nitrogen (TN), microbial populations, and enzyme activities were determined to ensure the changes in soil quality during incubation. The results showed that the application of natural liming materials led to an increase in soil pH similar to that of CaCO3. Soil concentrations of Cd, Pb, and As extracted with 0.1 or 1 M HCl, and diethylene triamine pentacetic acid (DTPA) were decreased significantly after adding liming materials, accompanied by increased microbial population and enzyme activities of dehydrogenase, phosphatase, β-glucosidase, and arylsulfatase. Additionally, eggshells and mussel shells induced significant increases in OM and TN in the soil. Application of natural liming materials offers a cost-effective way to immobilize heavy metals and metalloids in soils.
KW - Heavy metals
KW - Immobilization
KW - Remediation
KW - Soil enzyme
KW - Soil quality
UR - http://www.scopus.com/inward/record.url?scp=84888070554&partnerID=8YFLogxK
U2 - 10.1007/s12665-013-2410-3
DO - 10.1007/s12665-013-2410-3
M3 - Article
AN - SCOPUS:84888070554
SN - 1866-6280
VL - 70
SP - 3411
EP - 3420
JO - Environmental Earth Sciences
JF - Environmental Earth Sciences
IS - 7
ER -