Fate Of An Absorbent Gelling Material For Hygiene Paper Products In Landfill And Composting |
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| Institution: | 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, Lanzhou 730000, China;2. Key Laboratory of Mechanics on Disaster and Environment in Western China of Ministry of Education, Lanzhou University, Lanzhou, Gansu 730000, China;3. College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 73000, China |
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| Abstract: | A cross-linked polyacrylate polymer, referred to as absorbent gelling material (AGM), has been developed for use in hygiene paper products, such as infant diapers (nappies). The fate and effects of this polymer were studied in laboratory models of landfill and aerobic composting. Radiolabelled (14C) AGM was used to facilitate determination of fate and mass balance. Tests were conducted in 1201 reactors containing a mixture of solid waste and compost or solid waste only, and panty diaper pads. Controlled temperature and leachate recycle were used to accelerate the biological processes. AGM caused no adverse effects and most of the material remained associated with the diaper pad and surrounding waste. Very little AGM (less than 1%) biodegraded to CO2/CH4 under landfill conditions, while 2-4% appeared in leachate. The leachate was highly biodegradable aerobically. More of the AGM (6.4%) biodegraded to CO2/CH4 under aerobic composting conditions, while less than 1% appeared in leachate. |
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