Suppr超能文献

四种化学固化剂在城市生活垃圾焚烧飞灰中重金属固化/稳定性能的比较研究。

A comparative study on the heavy metal solidification/stabilization performance of four chemical solidifying agents in municipal solid waste incineration fly ash.

机构信息

Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, College of Geographical Science, Nanjing Normal University, Nanjing 210023, PR China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, PR China.

Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, College of Geographical Science, Nanjing Normal University, Nanjing 210023, PR China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, PR China.

出版信息

J Hazard Mater. 2015 Dec 30;300:451-458. doi: 10.1016/j.jhazmat.2015.07.037. Epub 2015 Jul 20.

Abstract

Investigated in this paper were the content, specification distribution, and risk assessment code (RAC) determination of six targeted heavy metals and potentially toxic metals in fly ashes from a municipal solid waste incinerator in China. Contained in it is a comparison of the solidification/stabilization performance of two novel solidifying agents of sixthio guanidine acid (SGA) and tetrathio bicarbamic acid (TBA) with sodium dimethyldithiocarbamate (SDD) and Na2S, and analysis of their leachability in accordance with TCLP 1311 of the US EPA and the extraction procedures of China (HJ/T 299-2007 and HJ/T300-2007). The total concentration of Zn, Cu, Ni, Pb, Cr, Cd is 37383.47, 3080.77, 1583.92, 1356.43, 566.15, and 77.83 mg/kg, respectively. Cr (3.7%) and Pb (7.50%) pose low risk; and Ni (12.93%) and Zn (15.45%) have a medium risk; while Cu (69.84%) and Cd (82.5%) have a very high risk according to their RAC score. Compared with SDD and Na2S, SGA and TBA show an excellent overall solidifying performance due to their multiply hydrosulfide groups that bind with heavy metals very efficiently. The obtained results indicate that the leaching content of Cd, Ni, Pb and Zn is higher than the thresholds prescribed in GB5085.3-2007, and the excessive acetic acid makes its binding capacity stronger in HJ/T 300-2007 than in TCLP 1311.

摘要

本文研究了中国城市生活垃圾焚烧飞灰中六种目标重金属和潜在有毒金属的含量、规格分布和风险评估码(RAC)的确定。本文比较了两种新型固化剂六硫胍酸(SGA)和四硫代双氨基甲酸(TBA)与二甲基二硫代氨基甲酸钠(SDD)和 Na2S 的固化/稳定化性能,并根据美国环保署的 TCLP 1311 和中国的提取程序(HJ/T 299-2007 和 HJ/T300-2007)分析了它们的浸出性。Zn、Cu、Ni、Pb、Cr、Cd 的总浓度分别为 37383.47、3080.77、1583.92、1356.43、566.15 和 77.83mg/kg。Cr(3.7%)和 Pb(7.50%)的风险较低;Ni(12.93%)和 Zn(15.45%)的风险为中等;而 Cu(69.84%)和 Cd(82.5%)的 RAC 评分表明风险很高。与 SDD 和 Na2S 相比,由于其多氢硫基团与重金属结合非常有效,SGA 和 TBA 表现出优异的整体固化性能。结果表明,Cd、Ni、Pb 和 Zn 的浸出含量高于 GB5085.3-2007 规定的阈值,HJ/T 300-2007 中过量的乙酸使其结合能力比 TCLP 1311 更强。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验