MINERAL OILS AND OTHER VOLATILE CONTAMINANTS IN PRINTED PAPER AND BOARD AND MEASURES FOR REMOVAL IN RECOVERED PAPER PROCESSING
Newspapers and magazines are important components of different recovered paper grades.Depending on the applied printing processes and printing inks the printed products contain different amounts of volatile organic compounds.In some extent these contaminants affect the quality of the fibre stock suspension and the produced recycling paper. In a current research project of PMV different printed newspapers,magazines,various recovered paper grades and recycling papers (graphic papers,tissue and packaging papers made from recovered paper) have been investigated concerning their amount and the identity of lightly volatile organic compounds (VOC) and semi-volatile organic compounds (SVOC).The method of analysis is based on the thermodesorption of paper and following GC/MS analysis.This procedure is described in the attachment 4 of the RAL-UZ 14 standard in detail.The experimental results showed significant differences in the VOC and SVOC amount and the emission potential of different printed products.For black and coloured printed newspaper samples (offset printed) the SVOC values (given as sum parameter TSVOC) vary between 3.300 to >9.200μg/g paper.The majority of the released SVOC compounds belong to the group of saturated hydrocarbons (alkanes,cycloalkanes,often branched compounds up to 26 carbon atoms in the molecule) as they occur in the mineral oils fraction of offset printing inks. Different processes of recovered paper processing have been evaluated regarding their potential of removing the undesirable organic compounds from the fibre suspensions.The processes of flotation and wash deinking are effective in the reduction of volatile compounds.Due to the accumulation of VOC and SVOC on the surface of the fines in the fibre stock suspension other processes like screening are applicable for the reduction of volatile organic compounds,too.
mineral oils volatile contaminants printed paper and board recovered paper processing
Samuel Schabel Antje Kersten Hans-Joachim Putz
Paper Technology and Mechanical Process Engineering (PMV),Technische Universitdt Darmstadt,Germany.
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
1428-1433
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）