Scientists developed a method to remove diclofenac from water by combining activated carbon and microfiltration or ultrafiltration. The process effectively removed over 90% of diclofenac and humic acid from the water. Microfiltration was preferred due to its higher efficiency. The membranes used showed minimal fouling and the treatment resulted in an increase in conductivity in the water. This hybrid process could be a useful way to clean water with small amounts of pharmaceuticals.