研究报告
付瑜玲,严晗璐,姚天启,廖雪珂,王智源,陈求稳.改性镁铝水滑石对黑臭水体中磷的去除效果研究[J].环境科学学报,2021,41(10):4032-4038
改性镁铝水滑石对黑臭水体中磷的去除效果研究
- The removal efficacy of phosphorus from malodorous black water by modified hydrotalcite
- 基金项目：国家自然科学基金（No.51809179）
- 作者
- 单位
- 付瑜玲
- 1. 南京水利科学研究院生态环境研究所, 南京 210029;2. 重庆交通大学河海学院, 重庆 400074
- 严晗璐
- 南京水利科学研究院生态环境研究所, 南京 210029
- 姚天启
- 贵州民族大学生态环境工程学院, 贵阳 550025
- 廖雪珂
- 1. 南京水利科学研究院生态环境研究所, 南京 210029;2. 重庆交通大学河海学院, 重庆 400074
- 王智源
- 南京水利科学研究院生态环境研究所, 南京 210029
- 陈求稳
- 南京水利科学研究院生态环境研究所, 南京 210029
- 摘要：通过采样和调研江苏省盐城市、扬州市不同程度治理的黑臭水体，分析其水质及磷赋存特征，选用对磷酸盐高效吸附的镁铝水滑石，开展了改性水滑石对黑臭水体中磷的吸附行为研究.结果表明：①调研的黑臭水体中44%水样磷浓度超过《地表水环境质量标准》Ⅴ类水标准限值，易发生水华等次生灾害，控磷减磷措施十分必要；②在黑臭水体pH值范围内，pH值对改性水滑石吸附磷的影响较小，改性水滑石的磷吸附量随初始溶液中磷的浓度升高而增大，其吸附动力学过程更符合准二级动力学方程；③在黑臭水体采集水样中，改性水滑石依然表现出较好的磷吸附能力，磷酸盐去除率达到了94.4%，可以有效削减黑臭水体中磷污染程度.
- Abstract：This study investigated the malodorous black water remediated in different levels in Yancheng and Yangzhou, Jiangsu Province to analyze the water quality and phosphorus (P) content. Hydrotalcite-type material with high P adsorption capacity was selected to conduct the P removal experiments in malodorous black water. The results demonstrated that:① around 44% of the sampled malodorous black water has high P concentrations over the concnetratioon limit of Class V of "Environmental Quality Standards for Surface Water", which may cause secondary pollution such as algal bloom. Therefore, measures to control P levels are necessary. ②pH value insignificantly affected the P removal efficiency of modified hydrotalcite, while the P uptake quantity of adsorbent increased with the growing of initial P concentration in solution. The adsorption kinetics was better fitted by the pseudo-second-order sorption model. ③The modified hydrotalcite showed stable P removal performance in the sampled malodorous black water, and the phosphate elimination ratio reached 94.4%, which proved that it could be used to effectively reduce the P pollution in the malodorous black water.
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