树空坪矿区磷矿废石磷素的浸出特性

发布时间：2018-01-14 08:41

  本文关键词：树空坪矿区磷矿废石磷素的浸出特性　出处：《环境工程学报》2016年12期 　论文类型：期刊论文

  更多相关文章： 淋溶实验 磷矿废石 液固比 浸出

【摘要】：研究不同液固比条件下磷矿废石磷素浸出特性,为磷矿废石利用及治理提供理论依据和技术指导,进行磷矿废石磷素静态淋溶实验。结果表明:磷矿废石磷素释放过程中,液固比直接影响磷矿废石中磷素释放速率;低液固比条件下(液固比小于5.0 m L·g~(-1)),固相和液相传质过程未达到平衡,溶液与磷矿废石相互作用在快速进行,高液固比条件下(液固比大于5.0 m L·g~(-1)),固相和液相传质过程趋于稳定;液固比淋溶实验过程中总磷浓度没有明显变化,而磷素累加释放量随着液固比呈现出线性变化,说明pH浸提液对于磷矿废石中磷素释放作用属于溶解度控制。
[Abstract]:In order to provide theoretical basis and technical guidance for the utilization and treatment of waste phosphate rock, the leaching characteristics of phosphate rock waste rock under different liquid-solid ratio were studied. The static leaching experiment of phosphate rock waste rock was carried out. The results showed that the ratio of liquid to solid directly affected the phosphorus release rate in phosphate rock waste rock during the process of phosphorus release. Under the condition of low liquid-solid ratio (liquid-solid ratio less than 5.0 mL 路g ~ (-1)), the mass transfer process between solid phase and liquid phase does not reach equilibrium, and the interaction between solution and waste rock of phosphate rock is carried out rapidly. Under the condition of high liquid-solid ratio (liquid-solid ratio > 5.0 mL 路g ~ (-1)), the mass transfer process of solid phase and liquid phase tends to be stable. There was no significant change in total phosphorus concentration during the liquid-solid leaching experiment, but the cumulative phosphorus release showed a linear change with the liquid-solid ratio, which indicated that the phosphorus release from the waste rock of phosphate rock was controlled by pH leaching solution.
【作者单位】： 辽宁工程技术大学力学与工程学院;
【分类号】：X754
【正文快照】： 自2003年6月长江三峡水利枢纽关闸蓄水以来,三峡库区发生了多次水华现象,库区部分回水区和库湾已经成为“水华”敏感区域。根据丁恩俊[1]对库区32条主要入库河流中营养状态研究表明,库区水体富营养化污染源主要来自支流和干流。其中,香溪河即为重度富营养化河流之一[2]]。香溪，

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