卷烟包装材料及滤嘴的生物降解性能研究

本研究以目前几种常见的卷烟包装用商标纸、卡纸、铝箔内衬纸、透明塑料薄膜以及卷烟滤嘴为实验材料，采用ATSMD-5338标准方法，进行了为期25天实验。结果表明商标纸、铝箔纸内衬纸和卡纸的生物降解性能比较好，而滤嘴和透明塑料薄膜的生物降解性能比较差。今后研究开发可降解卷烟包装材料应该把重点放在滤嘴和透明塑料薄膜上面。     

卷烟行业可降解包装材料发展趋势

可降解包装材料的研究和使用在快速发展，卷烟包装材料的发展也在朝着可降解的方向探索。通过总结国内外卷烟可降解包装材料的研究现状和现有可降解包装材料的特点，讨论了今后开发研究卷烟可降解包装材料的重点和方向。     

Converting wasteland into wonderland by earthworms—a low-cost nature’s technology for soil remediation: a case study of vermiremediation of PAHs contaminated soil

Earthworms in general are tolerant to many chemical contaminants including heavy metals and organic pollutants in soil and can bio-accumulate them in their tissues. Earthworms species like Eisenia fetida, Eisenia tetraedra, Lumbricus terrestris, Lumbricus rubellus and Allobophora chlorotica have been found to remove heavy metals (Cd, Pb, Cu, Hg, etc.) pesticides and lipophilic organic micropollutants like the polycyclic aromatic hydrocarbons (PAH) from the soil. They ‘absorb’ the dissolved chemicals through the moist ‘body wall’ in the interstitial water and also ‘ingest’ by mouth while the soil passes through the gut. They either ‘bio-transform’ or ‘biodegrade’ the chemical contaminants rendering them harmless in their bodies. Meanwhile the quality of the soil is improved significantly in terms of physical, chemical and biological properties as the worms thoroughly upturn and disperse the soil, ingest large volumes of soil and excrete nutritive materials (NKP and micronutrients) in the form of ‘vermicasts’ along with millions of beneficial soil microbes including nitrogen fixers.