改性羟基磷灰石负载零价铁去除模拟地下水中Cr(Ⅵ)的研究  

Removal of Cr(Ⅵ)from simulated underground water by modified hydroxyapatite loaded with zero-valent iron

作　　者：刘志武 王晓东[1] 张晓慧 魏凯 洪家军 LIU Zhiwu;WANG Xiaodong;ZHANG Xiaohui;WEI Kai;HONG Jiajun(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,China)

机构地区：[1]济南大学土木建筑学院,济南250022

出　　处：《工业用水与废水》2024年第6期19-25,共7页Industrial Water & Wastewater

基　　金：山东省自然科学基金项目(ZR2021ME142)。

摘　　要：为了有效去除模拟地下水中Cr(Ⅵ),采用化学还原法将零价铁负载在腐植酸改性后的羟基磷灰石上制成复合材料。研究了改性羟基磷灰石负载零价铁材料对模拟地下水中Cr(Ⅵ)的去除效果,探讨了复合材料投加量、初始pH值、Cr(Ⅵ)初始浓度以及共存阴离子对降解效果的影响。结果表明,在相同条件下改性羟基磷灰石负载零价铁对Cr(Ⅵ)具有良好的去除效果;初始pH值和Cr(Ⅵ)初始浓度越低,去除率和去除速率均越高;当Cr(Ⅵ)初始质量浓度为1 mg/L,复合材料投加量为0.1 g/L时,反应120 min后,Cr(Ⅵ)质量浓度低于0.004 mg/L;共存阴离子PO_(4)^(3-)、CO_(3)^(2-)对复合材料的抑制作用比较明显。In order to effectively remove Cr(Ⅵ)from simulated underground water,using chemical reduction method to load zero-valent iron on the hydroxyapatite modified by humic acid,so as to prepare composite material.The effect of modified hydroxyapatite loaded with zero-valent iron on Cr(Ⅵ)removal from simulated underground water was studied.The influence of composite material dosage,initial pH value,initial concentration of Cr(Ⅵ)and coexisting anion on degradation effect was discussed.The results showed that,the modified hydroxyapatite loaded with zero-valent iron had good removal effect on Cr(Ⅵ)under the same condition.The lower the initial pH value and the initial concentration of Cr(Ⅵ),the higher the removal rate and removal efficiency.When the initial mass concentration of Cr(Ⅵ)was 1 mg/L,the composite material dosage was 0.1 g/L,the mass concentration of Cr(Ⅵ)was lower than 0.004 mg/L after 120 min of reaction;besides,the inhibition effect of coexisting anion PO_(4)^(3-)and CO_(3)^(2-)on composite material was obvious.

关 键 词：地下水修复 羟基磷灰石 负载型 零价铁 Cr(Ⅵ) 

分 类 号：X703.5[环境科学与工程—环境工程]