文献类型：期刊文献

中文题名：过氧化钙缓释材料对河道水固磷及底泥控磷的机理研究

英文题名：Slow-release CaO2 and its mechanisms on adsorption of phosphorus in river water and control of phosphorus in sediment

作者：夏德春[1];郑翔[1];吕树光[2];郑立新[1]

机构：[1]中国水利水电第十二工程局有限公司施工科学研究院,浙江杭州330103;[2]华东理工大学资源与环境工程学院,上海200237

年份：2020

卷号：42

期号：5

起止页码：553

中文期刊名：环境污染与防治

外文期刊名：Environmental Pollution & Control

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：中国电力建设股份有限公司科技项目(No.2018-20)。

语种：中文

中文关键词：过氧化钙缓释材料;河道底泥;内源性磷控制;磷形态;水体修复

外文关键词：slow-release CaO2 material;sediment in river;internal phosphorus control;phosphorus forms;water restoration

摘要：用聚乙二醇2000(PEG2000)和硬脂酸(SA)包埋粉末过氧化钙(CP)成功制备了CP缓释材料CP@PEG2000-SA。比较了粉末CP和CP@PEG2000-SA对上覆水中溶解性总磷的影响和对底泥中磷酸铝盐(Al-P)、磷酸铁盐(Fe-P)和磷酸钙盐(Ca-P)的影响。结果表明,CP@PEG2000-SA投加量宜为1.8 kg/m^2,在CP用量相同的条件下计算得到粉末CP投加量为1.0 kg/m^2。投加粉末CP在10 d内上覆水中溶解性总磷浓度迅速降至最低后又上升,而投加CP@PEG2000-SA可以实现35 d内溶解性总磷持续缓慢下降。上覆水中的内源性磷一般来自底泥中Fe-P的释放。投加粉末CP虽能固定Fe-P含量,但起不到长效作用,甚至可能导致Al-P的释放。投加CP@PEG2000-SA可控制氧气释放速率,稳定pH,使得上覆水中溶解性总磷向底泥中的Al-P、Ca-P和Fe-P转化,起到长效抑制底泥中内源性磷向水体释放并同时吸收水体中磷的双重效应,达到了控磷目的。
Polyethylene glycol 2000(PEG2000)and stearic acid(SA)were used to modify powder CaO 2(CP)to synthesize the slow-release CP material CP@PEG2000-SA.The effects of powder CP and CP@PEG2000-SA on soluble TP in overlying water and aluminum phosphate(Al-P),calcium phosphate(Ca-P)and ferric phosphate(Fe-P)in sediment were compared.Results showed that the optimum CP@PEG2000-SA dosage was 1.8 kg/m^2,and for powder CP was 1.0 kg/m^2,of which CP content were equal.With powder CP addition,soluble TP reduced to the lowest rapidly in 10 d and then in creased,while with CP@PEG2000-SA addition,soluble TP reduced slowly in 35 d.Internal TP in overlying water mainly originated from Fe-P in sediment.Powder CP addition might immobilize Fe-P but could not last long,and it could also release Al-P probably.CP@PEG2000-SA addition could control the release rate of O2 and stabilize pH,so that to promote soluble TP in overlying water to transmit to Al-P,Ca-P and Fe-P in sediment.The CP@PEG2000-SA realized adsorption of phosphorus from water to sediment and inhibited the release of internal phosphorus in sediment,therefore achieving well phosphorus control performance.