扩散控制条件下铝基混凝剂除低浓度磷的效果研究
Removal effect of low concentration phosphorus with Al-based coagulant under diffusion control
李能能 1吴福雨 1张龙 1樊小东 1马彪 1高磊 1徐慧 2黄晨慧 3王希4
作者信息
- 1. 宁夏长城水务有限责任公司,银川 750000
- 2. 中国科学院生态环境研究中心环境水质学国家重点实验室,北京 100085
- 3. 长三角(义乌)生态环境研究中心,金华 321000
- 4. 中国中化控股有限责任公司,北京 100031;中化环境控股有限公司,北京 100160
- 折叠
摘要
该研究比较了不同浓度AlCl3 和Al13 铝基混凝剂在深度不同的情况下对不同磷形态的去除特征.结果表明:AlCl3 表现出优异的控磷能力,AlCl3 能够在 2h静沉后使总磷(TP)下降至 9 μg/L,并可在较短时间内降低溶解态磷,而Al13 对吸附态磷的去除效果更好;AlCl3 和Al13 都有助于表层水中颗粒态磷的去除,在pH=7.5的条件下,磷以Al-P沉淀的形式得以去除;AlCl3 具有更优的有机物去除能力,能够在 0.5 h时使DOC浓度快速降低.研究结果可为选择合适的控磷药剂和投药量提供参考,有助于制定原位磷污染控制策略及维护生态健康.
Abstract
The study compared the removal characteristics of different phosphorus forms at different depths with different concentrations of AlCl3 and Al13 aluminium-based coagulants.AlCl3 showed excellent phosphorus control,with AlCl3 reducing total phosphorus(TP)to 9 μg/L after 2 h of sedimentation and reducing dissolved phosphorus in a shorter period of time.Both AlCl3 and Al13 contributed to the removal of particulate phosphorus from the surface water.At pH=7.5,phosphorus was removed in the form of Al-P precipitation.AlCl3 had a better ability to remove organic matter and was able to reduce the DOC concentration rapidly at 0.5 h.The results of the study can provide a reference for the selection of suitable phosphorus control agents and dosage,and help to develop in-situ phosphorus pollution control strategies and maintain ecological health.
关键词
扩散控制/铝基混凝剂/磷形态/混凝/除磷Key words
diffusion/aluminum-based coagulants/phosphorus morphology/coagulation/phosphorus removal引用本文复制引用
基金项目
国家自然科学基金重点项目(52030003)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据