This disclosure relates to devices, methods and compositions for the controlled gas phase time-release of volatile and semi-volatile hydrophobic organic compounds from a granular polymer sorbent-non aqueous phase liquid-porous media matrix. Also, this disclosure relates to devices, methods and compositions for steady and long-term release into the gas phase of volatile organic compounds from a granular polymer sorbent-essential oil matrix coating made at ambient temperatures and pressures and placed in the porosity of granular porous media materials such as plastic particles, plastic absorption or stripping tower mass transfer packing material, wood pellets and geologic material. The gas phase compounds released from the granular polymer sorbent-essential oil matrix have aromatherapy, fragrance, insecticidal and insect repelling properties.
