Table 4. Agglomeration and dissolution behaviour of nCuO in ADaM with 0.1% TSPP over 48 h. After 48 h of incubation, strong agglomeration and sedimentation of nCuO particles occurred, making the determination of zeta potential impossible.

t (h)	XDLS (nm)	Zeta potential (mV)	Dissolved Cu (mg l−1)
0	132	−64.3	3.5
6	132	−41.3	4.63
24	146	−38.3	5.41
48	230	Not measurable	6.1