State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, 1239 Siping Road, Shanghai 200092, PR China.
State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, 1239 Siping Road, Shanghai 200092, PR China.
J Hazard Mater. 2017 Apr 5;327:28-34. doi: 10.1016/j.jhazmat.2016.12.029. Epub 2016 Dec 19.
Emission of Pb is a significant environmental concern during solid waste incineration. To target Pb emission control strategies effectively, the major sources of Pb in the waste incineration byproducts must be traced and quantified. However, identifying the migration of Pb in each waste component is difficult because of the heterogeneity of the waste. This study used a laboratory-scale incinerator to simulate the incineration of municipal solid waste (MSW). The Pb isotope ratios of the major waste components (Pb/Pb=0.8550-0.8627 and Pb/Pb=2.0957-2.1131) and their incineration byproducts were measured to trace sources and quantify the Pb contribution of each component to incineration byproducts. As the proportions of food waste (FW), newspaper (NP), and polyethylene bag (PE) in the artificial MSW changed, the contribution ratios of FW and PE to Pb in fly ash changed accordingly, ranging from 31.2% to 50.6% and from 35.0% to 41.8%, respectively. The replacement of PE by PVC significantly increased the partitioning and migration ratio of Pb. The use of Pb isotope ratios as a quantitative tool for tracing Pb from raw waste to incineration byproducts is a feasible means for improving Pb pollution control.
在固体废物焚烧过程中，铅的排放是一个重大的环境关注点。为了有效地针对铅排放控制策略，必须追踪和量化废物焚烧副产物中铅的主要来源。然而，由于废物的异质性，识别每个废物成分中铅的迁移是很困难的。本研究使用实验室规模的焚烧炉模拟城市固体废物（MSW）的焚烧。测量了主要废物成分（Pb/Pb=0.8550-0.8627 和 Pb/Pb=2.0957-2.1131）及其焚烧副产物的铅同位素比值，以追踪来源并量化每个成分对焚烧副产物的铅贡献。随着人工 MSW 中食物垃圾（FW）、报纸（NP）和聚乙烯袋（PE）的比例变化，FW 和 PE 对粉煤灰中铅的贡献率相应变化，范围分别为 31.2%至 50.6%和 35.0%至 41.8%。用 PVC 代替 PE 显著增加了 Pb 的分配和迁移率。利用 Pb 同位素比值作为从原始废物追踪到焚烧副产物中 Pb 的定量工具，是改善 Pb 污染控制的一种可行手段。
