废电路板非金属材料再生木塑产品环境安全性评价

为了评价废电路板非金属材料再生产品使用过程中的环境安全性问题，本文针对非金属材料再生产品的特性，参考相关评价标准，结合目前现有的环境危害评价方法和人体健康风险评价，构建了再生产品在使用过程中环境安全性评价模型.收集A、B两种再生木塑产品进行评价试验，评估其对环境和人体健康的潜在风险和危害.结果显示在不考虑水体稀释作用情况下，两种再生木塑产品对I类地表水均存在极度或重度污染的可能，对于其他类地表水环境风险较小，应避免在源头水等区域使用；对于地下水，产品B污染指数大于1，具有一定的环境风险；但是考虑在稀释情况下（5%），两种再生产品对于地下水的污染指数均小于1；两种再生木塑产品的非致癌风险指数分别为0.03和0.41，均小于1，对人体健康的危害作用不明显.本文可为非金属材料再生木塑产品环境安全性管理提供评价标准和参考，有利于促进废弃电器电子产品资源化和无害化技术的发展．

Environmental safety assessment of the recycled wood-plastic products with the non-metallic materials from waste printed circuit board

To evaluate the environmental safety issues in the use of non-metallic recycled products from waste circuit boards, an environmental safety assessment model of recycled wood-plastic products was constructed with reference to the characteristics of recycled wood-plastic products, the environmental hazard evaluation methods, and human health risk evaluation. Also, two kinds of recycled products were collected for the evaluation test, using the model to evaluate whether there were potential risks and hazards to the environment and human health. The results showed that both the two types of recycled products might cause extreme or severe pollution to the surface water of class I. For other types of surface water, the environmental risk is low, and the recycled products should be avoided when used in the primary area of the source water. For groundwater, the pollution index of product B is greater than 1, which has a certain environmental risk; When considering dilution effects (5% of the original concentration), the pollution indexes of two recycled products for groundwater are less than 1. The hazard indexes of two kinds of recycled products are 0.03 and 0.41respectively, both of which are less than 1, with no obvious harm to human health. The evaluation model provides evaluation criteria and references for large-scale production and promotion of non-metallic material recycling. Further, it promotes the development of waste electrical and electronic products recycling and harmless technology.