Study On The Environmental Feasibility Of Dioctyl O-phthalate Substitutes In Film

Plastic products have been concern with people’s life, agriculture production and industry closely, but plastic additives (plasticizers), such as phthalate esters or phthalates caused the food and environment safety issues have attracted much attention. To achieve cleaner production by using low or no toxicity plasticizer plastics (including film) to replace the existing Dioctyl o-phthalate in plastics can control pollution from the source of plastic products manufacture. This paper has done the research about three kinds of plasticizer and investigated the feasibility of two Dioctyl o-phthalate substitutes. The research methods and results are as follows:(1) Compared with tradition process formula of film, by adding different amount of plasticizer in the processing of film. Through mechanical testing, X-ray diffraction and scanning electron microscope, the results showed that ATBC groups:formula3>formula4> formula2>formula1, ESO groups:formula7> formula8>formula6>formula5; Only if adding35and30phr ATBC and the using amount of DOP is35, the PVC plastic can reach the standard of mechanics (GBT13735-1992)(2) Under the condition of laboratory simulation, by measuring the biomass of microorganism (Jsaria sp.), soybean seed germination rate and the earthworm survival rate, studied the toxicity of different plasticizer to organism. The results indicated that the toxicity of three plasticizers to harm sp. was:ESO> ATBC> DOP. DOP shows obvious toxicity on soybean sprout and earthworm survival, but the ESO and ATBC shows little toxicity on soybean sprout and earthworms survival.(3) By determining different plasticizer content in the liquid culture condition. Results showed that the degradation rate of three plasticizer which was degraded by fungus (Isaria sp.) was ATBC> ESO> DOP.(4) Planting garlic by using different film in farm. Through measuring the soil temperature and moisture, the effect of water and heat preservation from good to poor were in the order of ESO> DOP> ATBO CK (do not cover film).Through the test of soil enzyme activities and microbial biomass carbon, the soil microbial activity from high to low were in the order of ATBC> CK> ESO> DOP. By measuring the test crops germination rate, plant height, chlorophyll, biomass and soluble protein content, the quality of crop from high to poor were in the order of ESO>CK>ATBC>DOP.According to the results of field experiment, the effect of film from good to poor in the order of ESO>ATBC>DOP.(5) Compared with DOP synthesis of traditional film, if use ATBC synthetic of new film will increase the cost of1.1yuan per acre, while use of the ESO synthetic of new film will reduce the cost of1.4yuan per acre.Above all the results of this paper, two kinds of dioctyl phthalate substitutes have economic, technical and environmental feasibility.