摘要
利用尾矿为吸附剂,模拟了其对废水中磷的去除效果。结果表明,焙烧可以明显提高尾矿对模拟废水中磷的吸附,而尾矿投加量、接触时间、pH、反应温度均是影响吸附的重要因素。热活化尾矿对磷的吸附与Langmuir、Freundlich等温方程式的拟合程度均较高,在碱性条件下,对初始质量浓度为50mg/L的模拟含磷废水,磷的去除率可达96%以上。此外,由于尾矿具有特殊的层状结构和化学活性成分,特别是热活化尾矿,对模拟废水中的磷是较好的吸附剂,可用于去除废水中磷,是尾矿作为吸附剂去除实际废水中磷的重要基础。
A sample of the clean and sieved （200 mesh） copper mine railings was characterized by XRD; its major constituents were： Fe203 （31.0%）,SO3 （27. 4%）,CaO （17. 7%）,SiO2 （16. 9%）,Al2O3 （4.20%）. The sample was thermally activated to produce a more effective adsorbent for removing phosphate from solutions in the lab. The best adsorbent was produced by heating at 500 ℃ for 2 h. The adsorption isotherm data were well represented by both the Langmuir and the Freundlich isotherm models. Given the maximum adsorption capacity of 4. 56 mg/g, as predicted by the Langmuir model, it may be attractive to process some waste copper mine tailings by thermal activation for removing phosphate from wastewaters.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第5期15-17,32,共4页
Environmental Pollution & Control
基金
国家科技支撑计划课题(No.2006BAD17B06)
关键词
尾矿
磷
吸附
活化
废水
mine tailings
phosphate
adsorption
activated
wastewater
