Application of Biochar in the Remediation of Contaminated Soil with High Concentration of Lead and Zinc

Table 1

Basic properties of the contaminated soil.

Technical index	Value	Testing standard or method
Water content, w (%)	25	ASTM D2216-10 (ASTM 2010) [15]
Specific gravity, Gs	2.69	ASTM D5550-14 (ASTM 2014) [16]
Liquid limit, wL (%)	35.1	ASTM D4318-10 (ASTM 2010) [17]
Plastic limit, wp (%)	24.5	ASTM D4318-10 (ASTM 2010) [17]
Specific surface area (m^2/g)	41.25	Brunauer–Emmett–Teller (BET) method
pH (S/W = 1 : 1)	6.59	ASTM D4972-13 (ASTM 2013) [18]
EC (S/W = 1 : 5, ms/cm)	3.01	CJ/T340-2011 (MOHURD 2011) [19]
Contaminant concentration (mg/kg)	—	—
Pb	12510	USEPA method 3050B (USEPA 1996) [20]
Zn	11927	—