氢氟酸废液协同含铅飞灰无害化处理研究
Experimental Study on Harmless Treatment of Lead Containing Fly Ash with Hydrofluoric Acid
钟琦 1李行德 2张千帆 3任雪娇2
作者信息
- 1. 云南大地丰源环保有限公司,云南 昆明 650401;云南大地绿坤环保科技有限公司,云南 昆明 650401
- 2. 云南大地绿坤环保科技有限公司,云南 昆明 650401
- 3. 云南大地丰源环保有限公司,云南 昆明 650401
- 折叠
摘要
为了使碱性含铅飞灰达到危险废物填埋限值,使用氢氟酸废液作为含铅飞灰的稳定化药剂,在探究出氢氟酸废液的最佳用量后,以石灰作为pH调节剂,水泥做固化剂,可使总铅、无机氟化物的浸出毒性低于《危险废物填埋污染控制标准》(GB19598-2019)要求.结果表明,氢氟酸废液的加入量为10％(质量分数),石灰的加入量为4％(质量分数)调节pH在7.10～7.15之间时稳定化效果显著,最优结果为pH=7.15,总铅质量浓度0.145 mg/L,无机氟化物质量浓度3.7 mg/L.
Abstract
In order to make alkaline lead-containing fly ash reach the landfill limit of hazardous waste,hydrofluoric acid was used as stabilizer for lead-containing fly ash.After finding out the optimal dosage of hydrofluoric acid,lime is used as pH regulator,cement as curing agent,it can make the leaching toxicity of total lead and inorganic fluoride was lower than the requirements of"Hazardous Waste Landfill Pollution Control Standard"(GB19598-2019).The result shows that the addition of hydrofluoric acid is 10％(wt/％),the addition of lime is 4％(wt/％)to adjust the pH between 7.10-7.15,and the stabilization effect is significant,the optimal results were pH=7.15,total lead=0.145mg/L,inor-ganic fluoride=3.7 mg/L.
关键词
含铅飞灰/氢氟酸/石灰/浸出毒性Key words
Lead Fly Ash/Hydrofluoric Acid/Lime/Leaching Toxicity引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据