DETERMINATION OF HEAVY METALS (Pb, Cr, Cd AND Hg) IN PRINTING INKS AND THEIR EFFECT ON THE RECOVERY OF WASTE PAPER AND BOARD
In this paper, Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used to measure the levels of four representative heavy metals- Lead (Pb), Chromium (Cr), Cadmium (Cd) and Mercury (Hg) in 8 types of printing inks which are produced from two famous printing ink factories in China. The results show that there are amounts of Pb, Cr and Hg in all the 8 ink samples, while no Cd is detected. The contents of Pb, Cr and Hg are 6.520~95.750μg·L-1, 25.637~5578.897μg·L-1, and 4.772~237.012μg·L-1 respectively. Meanwhile, 13 kinds of paper food packaging materials which were printed by the inks originating from the 8 types of ink samples above and 3 corresponding blank paper samples which were not printed were pretreated according to procedures proposed by European Council, and then analyzed for the levels of Pb, Cr, Cd and Hg as well. Compared with the blank samples, the concentrations of Pb, Cr and Hg in the printed samples are remarkably higher than the blank ones. As for Cd, the differences between the paper samples are tiny and can be ignored. Present investigations point out that the major source of heavy metals is the printing ink, and to control the levels of heavy metals in printing inks is the best way to improve the quality of waste paper and board.
printing ink paper food packaging material heavy metal recovery of waste paper and board
Xue Meigui Wang Shuangfei Huang Chongxing
Light Industry and Food Engineering Institute,Guangxi University, Nanning, 530004, China
国际会议
广州
英文
1129-1132
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）