| 宋 迪， 陶 红， 毛凌晨， 闻海峰， 董继锋.水泥、沸石和TMT固化污染底泥的实验研究Journal of Water Resources and Water Engineering[J].,2015,26(3):60-64 |
| 水泥、沸石和TMT固化污染底泥的实验研究 |
| Experiment on contaminated sediment solidificated by cement, zeolite and TMT |
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| DOI：10.11705/j.issn.1672-643X.2015.03.013 |
| 中文关键词: 污染底泥 水泥 沸石 TMT 抗压强度 重金属 浸出毒性 水体二次污染 |
| 英文关键词: contaminated sediment cement zeolite TMT compressive strength heavy metals leaching toxicity secondary pollution of water body |
| 基金项目:上海科委重点支撑项目(13230502300)；沪江基金研究专项（D14004） |
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| 中文摘要: |
| 为了更好地探明水泥、天然斜发沸石和TMT固化污染底泥的性能，以抗压强度、浸出液pH值、污染物浸出毒性为指标，探究了三者之间最优配比和最佳工艺条件。结果表明：当底泥∶水泥∶沸石∶TMT质量比为1∶0.42∶0.18∶0.04时达到最优配比，其7、14和28 d无侧限抗压强度达到了3.07、3.92和6.06 MPa，浸出液pH进一步降低，重金属和CODCr浸出量分别减少90%和50%以上。其7 d抗压强度满足相应行业标准，污染物浸出毒性符合城镇污水处理厂污染物三级排放标准，为底泥资源化实际应用提供了研究基础。 |
| 英文摘要: |
| In order to probe the properties of contaminated sediment which is solidificated by cement , zeolite and TMT,the paper studied the optimum ratio and conditions of the three components by taking compressive strength, leachate pH and leaching toxicity as indicaters.Results showed that the optimum condition is that the mass ratio of sediment,cement, zeolite and TMT is 1∶0.42∶0.18∶0.04. The compressive strengths of solidified products in 7 , 14 and 28 days are 3.12, 4.07 and 6.28 MPa respectively. Leachate pH value is further reduced. In addition, the amount of heavy metals and CODCr in leachate are reduced by more than 90% and 50% respectively.The compressive strength of the solidified products after 7 days meets the industrial standard and the leaching toxicity satisfied the third grade discharge standard of pollutants for municipal wastewater treatment plant.The result provides the research foundation for the practical application of sediment resource recovery. |
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