Arko, who was competing in her first major international competition after winning eight medals at the African Weightlifting Championships in Casablanca, Morocco last year, finished with a total of 140kg.
She went through the initial snatch phase of the competition with three lifts and rounded up with three lifts in the clean-and-jerk.
She was prevented from taking a gold medal by an Egyptian athlete (Sarah) while a Moroccan won third place.
The 2013 SWAG Weightlifter of the Year is one of three athletes on a Ghana Olympic Committee sourced Olympic Solidarity Scholarship, and has already qualified to compete in the World Youth Championship in Nanjing, in August.
In a related development, Ghana’s other Weightlifter at the AYG, Christian Amoah will be chasing a medal and qualification to the World Youth Championship when he competes in the boy’s 77kg event on Saturday.