GB/T 22047-2008 (English Version) PDF

Standard No.: GB/T 22047-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 22047-2008

Scope: This standard specifies the method for determining the final aerobic biodegradability of plastic materials in soil by measuring the oxygen demand in a closed respirometer or measuring the amount of released carbon dioxide. This standard obtains the optimum degree of biodegradation rate by adjusting the humidity of the test soil. If the non-pre-exposed soil is used as the inoculum, this test only simulates the biodegradation process in the natural soil environment; if the pre-exposed soil is used, this standard can be used to determine the potential biodegradability of the test material. This standard applies to the following materials: - natural and (or) synthetic polymers, copolymers or their mixtures; - plastic materials containing additives such as plasticizers, pigments or other compounds; - water-soluble polymers; - materials that do not inhibit the activity of microorganisms in the soil under the test conditions, the inhibition can be measured using inhibition control or other appropriate methods (see ISO 8192:1986). If the test material has an inhibitory effect on the activity of microorganisms in the soil, a lower concentration of the test material, other inoculum or pre-exposed soil can be used.

GB/T 22047-2008 Referenced Document

ASTM D5988-96 Standard Test Method for Determining Aerobic Biodegradation in Soil of Plastic Materials or Residual Plastic Materials After Composting
ISO 10381-6:1993 Soil quality; sampling; part 6: guidance on the collection, handling and storage of soil for the assessment of aerobic microbial processes in the laboratory
ISO 10390:1994 Soil quality - Determination of pH
ISO 10634:1995 Water quality - Guidance for the preparation and treatment of poorly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium
ISO 10694:1995 Soil quality - Determination of organic and total carbon after dry combustion (elementary analysis)
ISO 11266:1994 Soil quality - Guidance on laboratory testing for biodegradation of organic chemicals in soil under aerobic conditions
ISO 11274:1998 Soil quality - Determination of the water-retention characteristic - Laboratory methods
ISO 8192:1986 Water quality; Test for inhibition of oxygen consumption by activated sludge

2008 GB/T 22047-2008 Plastics. Determination of the ultimate aerobic biodegradability in soil by measuring the oxygen demand in a respirometer or the amount of carbon dioxide evolved