Elastic Properties of Natural Sea Surface Films Incorporated with Solid Dust Particles: Model Baltic Sea Studies

Table 3

Elasticity modules of composite surfaces obtained from experimental isotherm measurements (a), and theoretical predictions (from (8)) (b). Original sea water collected at Jelitkowo on 08.12.06; 𝑇=22.4°C, pH = 8.4, 𝛾_A/W=60.5 mN m⁻¹. 𝐾 is the ratio 𝐸_isoth/𝐸_free, where 𝐸_free is the modulus for clean particle-free seawater surface (c). Standard deviation is given in brackets.

Sample	𝐸^aisoth (mN m^−1)	𝐸^bcom (mN/m)	𝐾
Talc
𝑅 = 11.47 𝜇m
N = 16 mm^−2	10.60 (1.26)	12.90 (1.55)	1.29
𝜃=112.0^∘
Microsphere
𝑅 = 44.00 𝜇m
N = 12 mm^−2	12.96 (1.57)	13.39 (1.61)	1.58
𝜃=92.2^∘
Combustion dust
𝑅 = 1.89 𝜇m
N = 9 mm^−2	11.84 (1.43)	12.25 (1.48)	1.45
𝜃=120.1^∘
Jelitkowo	8.17^c (1.03)	—	—