| PDP玻璃中金属锌的环境溶出特性 |
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| 引用本文： | 姜鹏飞,陈海焱,陈梦君,蒋冬梅.PDP玻璃中金属锌的环境溶出特性[J].中南大学学报(自然科学版),2012,43(4):1589-1594. |
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| 作者姓名： | 姜鹏飞 陈海焱 陈梦君 蒋冬梅 |
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| 作者单位： | 1. 西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳,621010
2. 西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳,621010;清华大学固体废物处理与环境安全教育部重点实验室,北京,100084 |
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| 基金项目： | 四川省教育厅青年基金资助项目，清华大学固体废物处理与环境安全教育部重点实验室开放基金资助项目 |
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| 摘 要： | 通过BCR三步逐级提取法、TCLP程序和DTPA及EDTA生物可利用性提取法,对废弃等离子显示屏玻璃中金属锌的环境溶出特性进行研究。结果表明:废弃PDP玻璃前、后板中Zn的化学形态均以可交换与弱酸溶解态和可还原态为主,前板中可氧化态Zn含量高于残渣态,后板中则残渣态Zn含量高于可氧化态Zn含量。废弃PDP玻璃具有较高的环境浸出毒性,其中,Zn的高浸出毒性主要是由可交换与弱酸溶解态和可还原态决定的,前、后板中这2种形态Zn的浸出量分别占其浸出总量的91.06%和96.79%,而可氧化态和残渣态对其TCLP浸出毒性贡献不大。废弃PDP玻璃中Zn的生物有效提取绝对量较高,其中,后板中Zn的EDTA提取量高达812.17mg/kg,废弃PDP玻璃潜在的生物可利用性非常高。
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| 关 键 词： | 废弃PDP玻璃 TCLP 化学形态 BCR法 生物可利用性 |
Environment leaching characteristics of metallic Zn in waste PDP glass |
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| JIANG Peng-fei
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CHEN Hai-yan
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CHEN Meng-jun
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JIANG Dong-mei.Environment leaching characteristics of metallic Zn in waste PDP glass[J].Journal of Central South University:Science and Technology,2012,43(4):1589-1594. |
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| Authors: | JIANG Peng-fei CHEN Hai-yan CHEN Meng-jun JIANG Dong-mei |
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| Institution: | 1(1.Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China;2.Key Laboratory for Solid Waste Management and Environment Safety,Ministry of Education,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The environment leaching characteristics of metallic Zn in the glass of waste plasma display panel(PDP) were studied using the methods of three-step sequential extraction method(BCR method),toxicity characteristic leaching procedure(TCLP) and DTPA&EDTA bioavailability extraction procedures.The results show that main chemical forms of Zn in waste PDP(front panel and back panel,FP&BP) are both exchangeable & weak soluble fraction and reducible fraction,the content of oxidizable fraction Zn is higher than that of residual fraction Zn in FP,and the content of BP residual fraction Zn is higher than that of its oxidisable fraction.The waste PDP glass has higher leaching toxicity,which rests with exchangeable &weak acid soluble fraction and reducible fraction.The leaching contents of Zn in FP&BP account for total are 91.06% and 96.79%,respectively,while the oxidizable and residual fractions have little contribution to the TCLP leaching toxicity.The absolute biological extracted effectively quantity of Zn in waste PDP is higher,and the content of EDTA-extractable Zn in BP is 812.17 mg/kg,which displays that waste PDP has higher potential biologic toxicity. |
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| Keywords: | waste PDP glass TCLP chemical form BCR method biological effectiveness |
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