垃圾焚烧厂中检测到溶解有机物质（DOM）：底灰和飞灰中 DOM 和潜在有毒元素变化的研究。
Dissolved organic matter (DOM) was detected in MSWI plant: An investigation of DOM and potential toxic elements variation in the bottom ash and fly ash.
机构信息
Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; College of Ecology and Environment, Hainan University, Haikou, Hainan 570228, China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Haikou 570228, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan 570228, China.
Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; College of Ecology and Environment, Hainan University, Haikou, Hainan 570228, China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Haikou 570228, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan 570228, China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan 570228, China.
出版信息
Sci Total Environ. 2022 Jul 1;828:154339. doi: 10.1016/j.scitotenv.2022.154339. Epub 2022 Mar 4.
The content of dissolved organic matter (DOM) and potentially toxic elements (PTEs) were investigated in the bottom ash (BA) and fly ash (FA) of different sections of the municipal solid waste incineration (MSWI) plant. BA and FA were collected from the dry (BA1-BA2), burn (BA3-BA4), and burn-out (BA5) sections of the grate incinerator; FA was collected after denitration (DNFA), and from the deacidification tower (FA1) and bag-type dust remover (FA2), respectively. The DOM concentration in BA was higher than that in FA, the highest concentration was in BA3 (556.18 mg/kg), while the lowest concentration was in DNFA (17.53 mg/kg). DOM in BA was mainly composed of protein-like, fulvic-like, tryptophan-like, and humic-like substances, of which humic-like substances accounted for more than 40%. DOM in FA consisted of tryptophan-like and humic-like substances, of which humic-like substances accounted for more than 80%. DOM still existed in BA which may be related to the incomplete combustion, and the influence of microbes, while DOM was increased in FA1, which might be due to the addition of lime slurry. PTEs were analyzed by the Tessier extraction method, Fe-Mn hydroxide-bound fraction of PTEs increased in FA1 in which DOM concentration (137.22 mg/kg) was 7.83 times that in DNFA. The increase of DOM may lead to a higher risk of PTEs in FA. FTIR results indicated that DOM can bond to PTEs in BA and FA. The contents of humus-like substances in DOM were positively correlated with the effective fraction of As, Cu, Pb, Cr, and Cd. This paper investigated the risk of DOM existing in BA and FA in MSWI plant, which can provide a new perspective on how to deal with BA and FA, and reduce their environmental risks.
研究了不同城市生活垃圾焚烧（MSWI）厂部位的底灰（BA）和飞灰（FA）中溶解有机质（DOM）和潜在有毒元素（PTEs）的含量。BA 和 FA 分别从炉排炉的干（BA1-BA2）、燃烧（BA3-BA4）和燃尽（BA5）段、脱硝后（DNFA）、除酸塔（FA1）和袋式除尘器（FA2）中收集。BA 中的 DOM 浓度高于 FA，最高浓度出现在 BA3（556.18mg/kg），而最低浓度出现在 DNFA（17.53mg/kg）。BA 中的 DOM 主要由蛋白类、富里酸类、色氨酸类和腐殖酸类物质组成，其中腐殖酸类物质占比超过 40%。FA 中的 DOM 由色氨酸类和腐殖酸类物质组成，其中腐殖酸类物质占比超过 80%。BA 中仍存在 DOM 可能与不完全燃烧以及微生物的影响有关，而 FA1 中 DOM 增加可能是由于添加了石灰浆。采用 Tessier 提取法分析 PTEs，FA1 中 PTEs 的 Fe-Mn 氢氧化物结合态增加，其中 DOM 浓度（137.22mg/kg）是 DNFA 的 7.83 倍。DOM 的增加可能导致 FA 中 PTEs 的风险更高。FTIR 结果表明，DOM 可以与 BA 和 FA 中的 PTEs 结合。DOM 中腐殖酸类物质的含量与 As、Cu、Pb、Cr 和 Cd 的有效态呈正相关。本文研究了 MSWI 厂中 BA 和 FA 中 DOM 存在的风险，为处理 BA 和 FA、降低其环境风险提供了新的视角。
Zotero 插件