Furthermore, all the average ANAPs after adsorptive stability significantly increased as increase of nut shell carbon at level 0.01(r = 0.99, P = 0.01, and n = 4).
All the average ANAPs after adsorptive stability increased with increase of nut shell carbon and were significantly correlated to the additive proportion at level 0.01 (r = 0.99, P = 0.01, and n = 4).
Exception was that the ANAPs of loamy soil adding 20% rice husk carbon were higher than those of sandy soil.
To sum up, all the ANAPs of comparative samples with rice husk carbon and nut shell carbon achieved adsorptive stability within 10 min.
Moreover, the ANAPs of pure loamy soil were higher than those of pure sandy soil in first 10 min adsorption process (Figures 4 and 5).