摘要
为了解我国进口再生塑料颗粒中重金属溶出特性,以某检测机构的5种再生塑料颗粒PP、PE、PS、PET和ABS为研究对象,研究不同温度、不同接触时间和不同模拟液等条件下,再生塑料颗粒中重金属溶出特性。结果表明,在25、40、70℃这3种温度下,PP、PE、PET和ABS再生塑料颗粒中重金属铬、铅、锰、镉、汞和铜的溶出量随着温度的升高而增加,PS中重金属浓度随温度升高变化不大;随着接触时间的增长,样品中的6种重金属Cr、Pb、Mn、Cu、Cd、Hg溶出量增长趋势由快至慢,5种再生塑料颗粒中重金属Cr的溶出浓度最高;PE、PS、PET和ABS再生塑料颗粒在4种模拟液中重金属溶出量大小整体呈现出:50%乙酸>3%乙酸>10%乙醇>95%乙醇,但PP再生塑料颗粒中重金属Cu在3%乙酸中的溶出量比10%乙醇中的多。本研究结果可为建立塑料接触材料及制品中重金属溶出量的标准方法提供依据。
In order to understand the dissolution characteristics of heavy metals in imported recycled plastic granules in my country,five recycled plastic granules PP,PE,PS,PET and ABS from a testing institution in Chengdu were used as the research objects.Dissolution characteristics of heavy metals in recycled plastic particles under conditions such as liquid.The results showed that the dissolved amounts of heavy metals chromium,lead,manganese,cadmium,mercury and copper in the five recycled plastic particles increased with the increase of temperature at three temperatures of 25,40 and 70℃.The concentration of heavy metals didn’t change much with the increase of temperature;with the increase of contact time,the dissolution amount of six heavy metals Cr,Pb,Mn,Cu,Cd and Hg in the sample first increased rapidly and then increased slowly,and The dissolution concentration of the heavy metal Cr of in the five recycled particles is the highest;the dissolution of the five types of recycled plastic particles in the four simulated solutions showed the overall size:50%acetic acid>3%acetic acid>10%ethanol>95%ethanol,but the dissolved amount of heavy metal Cu of PP recycled plastic particles in 3%acetic acid was more than that in 10%ethanol.The results of this study can provide a basis for establishing the standard method and national standard of heavy metals in plastic contact materials and products in our country.
作者
康志鹏
岳波
林晔
张颖
孟棒棒
王超
梁宇廷
KANG Zhipeng;YUE Bo;LIN Ye;ZHANG Ying;MENG Bangbang;WANG Chao;LIANG Yuting(Institute of Solid Waste Pollution Control Technology,Chinese Academy of Environmental Sciences,Beijing 100012,China;Shenyang Jianzhu University and Environmental Engineering,Shenyang 110168,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2023年第9期3031-3037,共7页
Chinese Journal of Environmental Engineering
基金
国家重点研发计划资助项目(2019YFC1904802)。
关键词
进口再生塑料颗粒
溶出实验
温度
接触时间
模拟液
imported recycled plastic particles
dissolution test
temperature
contact time
simulated solution
