Lead Speciation and Bioavailability in Apatite-Amended Sediments

Table 1

Chopawamsic Creek sediment experimental plot contamination identification and amendment rate along with texture and organic carbon characteristics.

Sample	Pb contaminated	Amendment	Sand (%)	Silt (%)	Clay (%)	TOC (%)	pH	Redox potential (mV)
Plot A	No	None	1.8	52.1	46.2	18.7	6.27	−277.6
Plot B	No	3% P apatite	0.3	33.7	66.0	20.4	6.16	−276.7
Plot C	Yes	1.5% P apatite	0.1	41.7	58.3	13.2	6.22	−276.2
Plot D	Yes	None	0.3	34.4	65.3	20.3	6.37	−269.4
Plot E	Yes	3% P apatite	0.1	24.6	75.3	17.9	6.28	−261.2