Transformation of PVP coated silver nanoparticles in a simulated wastewater treatment process and the effect on microbial communities

Table 1 Linear combination fitting analysis of XANES spectra of sludges collected from the SBRs (aerobic), sludges after anaerobic batch tests (anaerobic) and from the short term wastewater experiment

Sample	Ag₂S	Ag₂S NP + Ag-GSH	Ag(0)	Ag-acetate	Ag-thiosulfate	*Residual*
Aerobic sludges
Control		40 (5)	20 (3)	19 (3)	23 (4)	0.350
Ag⁺	8 (2)	72 (8)	6 (0.9)	14 (0.9)		0.029
AgNP		85 (4)	15 (4)			0.022
Anaerobic sludges
Control	39 (9)	24 (7)		27 (4)	11 (6)	0.549
Ag⁺	30 (1)	56 (2)		13 (0.7)		0.015
AgNP	13 (2)	78 (6)		8 (0.8)		0.030
Wastewater Experiment
4 min			100 (0.2)			0.776
24 min			100 (0.2)			0.863
210 min			100 (0.2)			0.927

The proportion of species are presented as percentages with the estimated standard deviation (SD) in parentheses. For the Ag₂S NP + Ag-GSH column, the SD is the sum of the individual SD’s from each species. The control sludge was collected from the SBR that was not spiked with Ag.

ISSN: 2661-801X