改性海绵铁用于含磷废水的处理  

Modified Sponge Iron for Phosphorus Wastewater Treatment

作　　者：雷若莹 王震 张若男 张元栋 刘婷婷 徐征 蒋立先 LEI Ruo-ying;WANG Zhen;ZHANG Ruo-nan;ZHANG Yuan-dong;LIU Ting-ting;XU Zheng;JIANG Li-xian(Hangzhou Vocational&Technical College,Hangzhou 310018,China.;Key Laboratory of Environmental Pollution Control Technology Research of Zhejiang Province,Eco-environmental Science Research&Design Institute of Zhejiang Province,Hangzhou 310007,China.;Wuyi Branch of Jinhua Ecological Environment Bureau,Jinhua 321200,China.)

机构地区：[1]杭州职业技术学院,浙江杭州310018 [2]浙江省环境污染控制技术研究重点实验室,浙江杭州310007 [3]金华市生态环境局武义分局,浙江金华321200

出　　处：《环境科技》2024年第1期13-16,21,共5页Environmental Science and Technology

基　　金：浙江省环境污染控制技术研究重点实验室开放基金资助(2021ZEKL03);浙江省领雁研发攻关计划资助(2023C03132);2023年浙江省大学生科技创新活动计划(2023R446011).

摘　　要：采用酸活化制备改性海绵铁,并对初始pH值、反应温度、共存阴离子等因素对除磷效果的影响进行讨论。结果表明,硫酸活化后的改性海绵铁表面呈花瓣状或珊瑚状粗糙结构,有效提高了其比表面积和孔容。在改性海绵铁投加量为6 g/L,总磷初始质量浓度为5 mg/L,反应6 h条件下,酸改性海绵铁对总磷去除率达95%,较原来提高了19.6%。低pH值和高温有利于海绵铁吸附除磷,Cl^(-),SO_(4)^(2-)等共存阴离子则可加快除磷速率,但CO_(3)^(2-)的抑制效果较为显著。酸改性后的海绵铁具有较好的连续除磷能力,且未出现板结情况。Modified sponge iron was prepared by acid activation.The effects of initial pH,reaction temperature,coexisting anions and other factors on phosphorus removal were discussed.The results showed that the surface of the modified sponge iron after activation by sulfuric acid showed a petal-like or coral-like rough structure,which effectively increased the specific surface area and pore volume.The total phosphorus removal rate of the acid-modified sponge iron was 95%,Which was 19.6%higher than that of the original sponge iron under the conditions of 6 g/L dosage,5 mg/L total phosphorus initial mass concentration and 6 h reaction.The low pH and high temperature were favorable for the adsorption of sponge iron to remove phosphorus,while the coexisting anions such as Cl^(-)and SO_(4)^(2-)could accelerate the rate of phosphorus removal,but the inhibition effect of CO_(3)^(2-)was more significant.Acid-modified sponge iron has a good continuous phosphorus removal ability,continuous operation for 2 months,phosphorus removal efficiency remains above 68.8%,and no plate knot situation.

关 键 词：海绵铁 改性 除磷 

分 类 号：X5[环境科学与工程—环境工程]