Table 2.

Debromination rate constants and half-life of selected PBDEs and PCB 21 by nZVI/Pd, nZVI and nZVI/Pd-AC.

Particle	O2 content [ppm]	IUPAC No.	PBDE/PCB congener	kobs [1/d]	kFea [L/d·g]	kPdb [L/d·g]	Half-life [d]
nZVI/Pd	~7.8	BDE 1	2-monoBDE	0.38	6.91 E-02	15.2	1.82
		BDE 2	3-monoBDE	1.28	2.33 E-01	51.2	0.54
		BDE 3	4-monoBDE	1.37	2.49 E-01	54.8	0.51
		BDE 8	2,4’-diBDE	1.70	3.09 E-01	68.0	0.41
		BDE 12	3,4-diBDE	1.59	2.89 E-01	63.6	0.44
		BDE 28	2,4,4’-triBDE	3.02	5.29 E-01	121	0.23
		BDE 33	2,3’,4’-triBDE	2.72	4.95 E-01	109	0.25
		BDE 21	2,3,4-triBDE	2.43	4.42 E-01	97.2	0.29
		PCB 21	2,3,4-triCB	9.90 E-02	1.80 E-02	3.97	7.00
nZVI/Pd	~0.5	BDE 8	2,4’-diBDE	7.80	1.42	211	0.09
		BDE 12	3,4-diBDE	6.56	1.19	177	0.11
		BDE 33	2,3’,4’-triBDE	8.04	1.46	217	0.09
nZVIc	~7.8	BDE 1	2-monoBDE	2.80 E-03	5.09 E-05	-	247
		BDE 2	3-monoBDE	3.40 E-03	6.18 E-05	-	203
		BDE 3	4-monoBDE	2.70 E-03	4.91 E-05	-	256
		BDE 12	3,4-diBDE	3.14 E-02	5.72 E-04	-	22
		BDE 21	2,3,4-triBDE	2.95 E-01	5.37 E-03	-	2.35
		PCB 21	2,3,4-triCB	2.00 E-03	3.64 E-05	-	347
nZVI/Pd-AC	~7.8	BDE 21	2,3,4-triBDE	5.00 E-02	5.00 E-01	2.02	13.9
	<0.1	PCB 21d	2,3,4-triCB	4.27 E-01	2.97 E-02	0.61	1.62

^aThe observed rate constants (k_obs) were normalized by the mass concentration of ZVI.

^bThe observed rate constants (k_obs) were normalized by the mass concentration of Pd if applicable.

^cZhuang, et al. (4)

^dChoi, et al. (30)