腐殖酸对CaO2回收磷的影响  

Effect of Humic Acid on Phosphorus Recovery by CaO2

作　　者：白润英[1] 徐慧 胡文斌 李晓蕾 BAI Runying;XU Hui;HU Wenbin;LI Xiaolei(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051)

机构地区：[1]内蒙古工业大学土木工程学院

出　　处：《工业安全与环保》2019年第9期77-80,共4页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(21107041);内蒙古自治区自然科学基金(2018MS05054);内蒙古自治区高等学校科学技术研究项目(NJZY18084)

摘　　要：对于从废水中回收磷,研究了不同条件下腐殖酸(HS)对CaO 2除磷的影响。结果表明,当初始Ca/P=1.67或者pH=8时,CaO 2对P的去除率最低,腐殖酸对磷酸盐沉淀的抑制作用最明显,抑制磷酸钙沉淀的形成。而在Ca/P≥3.33或pH≥9时,腐殖酸对磷酸盐沉淀没有明显抑制作用。随着溶液初始pH值或Ca/P比值的增大,HS的去除率也随之增加,即溶液初始pH值和Ca/P比值的增加有助于降低HS对磷酸盐沉淀的影响。通过XRD分析发现磷酸钙沉淀的晶体结构会因为腐殖酸的存在而改变。For the recovery of phosphorus from wastewater,the effect of humic acid(HS)on the removal of phosphorus from CaO 2 is studied under different conditions.The results show that when Ca/P=1.67 or pH=8,CaO 2 has the lowest removal rate of P,and humic acid has the most obvious inhibitory effect on phosphate precipitation and it inhibits the formation of calcium phosphate precipitation.However,when Ca/P≥3.33 or pH≥9,humic acid has no obvious inhibitory effect on phosphate precipitation.At the same time,with the increase of the initial pH or Ca/P value of the solution,the removal rate of HS also increases,showing that the increase of initial pH and Ca/P ratio of the solution helps to reduce the effect of HS on phosphate precipitation.By XRD analysis it is found that the crystal structure of the calcium phosphate precipitate changes due to the presence of humic acid.

关 键 词：腐殖酸 CAO2 Ca/P比值 PH值 磷酸钙沉淀 

分 类 号：X70[环境科学与工程—环境工程]