Detoxification and Recycling of fly ash by mechanochemical treatment

机械化学处理粉煤灰无害化及资源化

• 批准号: 14380266
• 负责人: HOSOMI Masaaki
• 金额: $ 6.78万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14380266/
• 关键词: Cement; Dechlorination; Detoxification; Dioxin; Fly ash; Heavy metal elution; Mechanochemical treatment; 反応機構; 水素化還元; 重合; ダイオキシシ類

Prevention of heavy metals elution by a mechanochamical processFly ash was treated by a mechanochamical (MC) process that involved milling with calcium oxide by using a planetary ball mill, and then heavy metals elution potencies among fly ash, MC-treated fly ash, and cemented MC process-treated fly ash were compared. The results confirmed prevention of heavy metals elution by MC treatment and cementation. When a stainless ball mill was used in MC treatment of fly ash, elution of Cr^<+6> from MC-treated fly ash was significantly enhanced, thereby indicating necessity of a change in the material of ball mill.MC degradation of dioxinsModel dioxin compounds, octachlorodibenzo-p-dioxin (OCDD), and octachlorodibenzofuran (OCDF) were degraded by a MC process. Measurements of chloride ions after MC treatment of OCDD and OCDF showed about 100% dechlorination of both compounds ; tetra- to heptachlorinated dibenzo-p-dioxins/furans (T4-H7CDD/Fs) were detected only at trace levels, and no other chlorinated organic compounds were observed. The residue after MC treatment was gray in color, indicating the possibility of carbonization. The results allow us to expect that the degradation products of OCDD and OCDF have no dioxin-like endocrine disruption potency.

通过使用行星球磨机处理涉及用氧化钙进行铣削的机械化学（MC）工艺来预防重金属洗脱，然后比较了粉煤灰，MC处理的粉煤灰和胶结MC工艺处理的粉煤灰的重金属效果。结果证实了通过MC处理和胶结预防重金属洗脱。当使用不锈钢磨机用于MC处理粉煤灰时，从MC处理的粉煤灰中洗脱了Cr^<+6>的洗脱，从而显着增强，从而表明必须改变球磨机的材料。MC二氧化物Model dioxin dioxin dioxin dioxin compoundt降解，Octachlorodibenzo-p-Dioxin（Ocd by）（Ocd by）（ocd by）（ocd by） MC过程。 MC治疗OCDD和OCDF后的氯离子的测量显示，两种化合物的脱氯约为100％。仅在痕量水平下检测到四氯的二苯甲酸二苯甲酸二氧蛋白/Furans/Furans（T4-H7CDD/FS），并且未观察到其他氯化有机化合物。 MC处理后的残留物颜色为灰色，表明碳化的可能性。结果使我们可以期望OCDD和OCDF的降解产物没有类似二恶英的内分泌效力。

项目成果

Elucidation of degradation mechanism of dioxins during mechanochemical treatment

• DOI: 10.1021/es049446w
• 发表时间: 2005-05-15
• 期刊: ENVIRONMENTAL SCIENCE & TECHNOLOGY
• 影响因子: 11.4
• 作者: Nomura, Y;Nakai, S;Hosomi, M
• 通讯作者: Hosomi, M

野村祐吾, 李炳大, 中井智司, 細見正明: "モデル物質として4-モノクロロビフェニル(MCB)を用いたメカノケミカル法によるダイオキシン類分解経路の追求"化学工学論文集. 28・5. 565-568 (2002)

Yugo Nomura、Byungdae Lee、Satoshi Nakai、Masaaki Hosomi：“使用 4-一氯联苯（MCB）作为模型物质的机械化学方法探索二恶英分解途径”《化学工程学报》28・5（2002 年）。