澳门城市垃圾焚烧底灰的蚕豆根尖微核试验

背景与目的：检测澳门城市垃圾焚烧底灰的遗传毒性，评价其可能对生态环境和人体健康的潜在影响。材料与方法：应用蚕豆根尖微核试验检测底灰不同的浸泡液。结果：澳门城市垃圾焚烧底灰浸泡液在本实验的条件下引起了，蚕豆根尖细胞微核率的升高，与空白对照组相比差异具有统计学意义：0．5％Na2EDTA浸泡液的微核率最低。结论：澳门城市垃圾焚烧底灰具一定的遗传毒性，在其进入环境（处置或阿利用）之前须去除其中的有毒有害物质；Na2EDTA溶液可在一定程度上降低底灰中重金属元素的生物有效性，缓解其对蚕豆根尖的遗传毒性，而显示一定的化学修复前景。

Genotoxicity of Bottom Ashes of Municipal Solid Waste Incineration from Macao

BACKGROUND&AIM: To investigate the genotoxicity of bottom ashes of municipal solid waste incineration from Macao and assess their potential risks on eco-environment and human beings. MATERIAL AND METHODS: The micronucleus(MN)assay was employed to detect their genotoxicity on Vicia faba. RESULTS: The leaching solutions of the bottom ashes could induce significantly increasing frequencies of micronuclei in the root tip cells of Vicia faba under the present conditions,compared with the control group.The MN frequency caused by the leaching solutions0.5%Na 2 EDTA was the lowest in the tested groups. CONCLUSION: It is necessary to remove the toxic elements or compounds of the bottom ashes before recycling.The Na 2 EDTA solution can decrease the bioavailability and the genotoxicity of the heavy metals on Vicia faba,offering a promising chance of chemical remedy.