A green study was undertaken for the extraction of plumbagin, an important natural naphthoquinone, from roots Plumbago pulchella Boiss. In first stage, four solvents were comparatively evaluated, acetone, n-hexane, ethyl acetate, and methanol; attending Principle #5, only (ethyl acetate acetone) underscored. a second step, considering # 6, various alternative activating modes assessed: two elec...