Abstract: In this paper, the cumulative stabilization constants 0f Cd-HA (Humic Acid) inthe alkali media have been studied and calculated using anode stripping voltammetry method(ASV) cornbined with GD-SAalgorithm in artificial neural network(ANN)- The molecularweight of humic acid originated from coal was determined by ASVmethod and its averagevalue is 995.2, The cumulative stabilization constants of the first and second order complexes of Cd²⁺-HAunder the condition of pH=10 were calculated and their values are 1gβ₁=4.079 and 1gβ₂=8.602 respectively.Two local minimum of objective function appear in iterative process.The values of objective function jump out from these local minimum successfully and reach to the global optimization.

Key words: GD-SA algorithm, Humic acid, Cadium, Cumulative stabilization constants