摘要
为控制用于建材的陶粒中重金属的环境风险,采集利用电镀污泥烧制的陶粒制取的陶粒砌块样品,分析其重金属含量、浸出毒性浓度和有效量,识别其特征重金属及潜在风险,建立陶粒砌块用于墙体材料和路面铺设2种暴露场景时,基于风险评估方法的重金属含量限值制订方法,并采用该方法计算了陶粒砌块中重金属含量限值。结果表明:陶粒砌块中特征重金属为Cr、Ni、Cu、Zn和Ba,其浸出(释放)浓度分别为30.0~48.6、37.2~132.0、28.7~50.6、12.9~169.0和609~674μg/L,低于GB 5085.3—2007《危险废物鉴别标准浸出毒性鉴别》中的标准限值,利用电镀污泥制取陶粒砌块是可行的资源无害化处理方法;废陶粒砌块中Cr、Ni、Cu、Zn、Ba浸出(释放)浓度限值分别为1.50、0.20、10.00、10.00和7.00 mg/L,含量限值分别为186198、3313、8740、36703和3272 mg/kg。提出的重金属含量限值制订方法可为陶粒中重金属环境风险控制提供依据,为建材中重金属含量限值制订提供参考。
In order to control the environmental risk of heavy metals in the ceramsite used for building materials,samples of ceramsite blocks prepared by using ceramsite fired by electroplating sludge were collected,and the content of heavy metals,the toxic concentration of leaching and the effective amount of heavy metals in ceramsite blocks were analyzed.The characteristic heavy metals and their potential risks were identified,and a method based on the risk assessment method for determining the limits of heavy metals was established when ceramsite blocks were used.The method was used to calculate the limits of heavy metals in ceramsite blocks in two kinds of exposure scenarios,i.e.wall materials and pavement laying.The results showed that the characteristic heavy metals in the ceramsite blocks were Cr,Ni,Cu,Zn and Ba.The leaching(releasing)toxicity concentrations of these five heavy metals was 30.0-48.6,37.2-132.0,28.7-50.6,12.9-169.0 and 609-674μg/L,respectively.These values were lower than the standard limits in Identification Standard for Hazardous Wastes-Identification for Extraction Toxicity(GB 5085.3-2007).Therefore,the use of electroplating sludge to make ceramsite blocks was a feasible resource harmless treatment method.The maximum leaching(releasing)concentration of Cr,Ni,Cu,Zn,Ba from abandoned ceramsite blocks was 1.50,0.20,10.00,10.00 and 7.00 mg/L,respectively.The limit content of Cr,Ni,Cu,Zn,Ba in ceramsite blocks was of 186198,3313,8740,36703 and 3272 mg/kg,respectively.The proposed method could provide basis for the environmental risk control of heavy metals in ceramsite and provide a reference for the method of formulating the content limits of heavy metals in building materials.
作者
杨延梅
王黎阳
杨玉飞
胡兰
黄启飞
YANG Yanmei;WANG Liyang;YANG Yufei;HU Lan;HUANG Qifei(School of River and Ocean Engineering, Chongqing Jiaotong University;Research Institute of Solid Waste Management, Chinese Research Academy of Environmental Sciences;Wuyuan Ninghai Environmental Protection Technology Co., Ltd.)
出处
《环境工程技术学报》
CAS
2020年第3期467-474,共8页
Journal of Environmental Engineering Technology
基金
国家重点研发计划项目(2016YFE0127800)。
关键词
陶粒砌块
墙体材料
路面铺设
重金属
含量限值
ceramsite block
wall material
pavement laying
heavy metal
limit of content
