改性榕树叶对废水中亚铁离子的吸附研究  

Study on Adsorption of Ferrous Ions in Wastewater with Modified Banyan Leaves

作　　者：马锡淼 廖颖敏[1] 吴巧玲 陈霞明 MA Ximiao;LIAO Yingmin;WU Qiaoling;CHEN Xiaming(Key Laboratory of Estuarine Ecological Security and Environmental Health,Tan Kah Kee College,Zhangzhou 363105,China)

机构地区：[1]厦门大学嘉庚学院,河口生态安全与环境健康福建省高校重点实验室,福建漳州363105

出　　处：《化工技术与开发》2022年第8期81-85,共5页Technology & Development of Chemical Industry

基　　金：漳州市自然科学基金项目(ZZ2021J42);福建省高校哲学社会科学研究项目(JSZM2020077);厦门大学嘉庚学院大学生创新创业训练计划项目(325)。

摘　　要：矿山等行业产生的废水中,亚铁离子的含量过高,会危害人体健康,本文分别设计了单因素、正交、动力学和等温吸附等实验,研究改性榕树叶对废水中亚铁离子的吸附效果。单因素实验结果表明,废水中亚铁离子的去除率,随着榕树叶投加量、振荡时间和振荡温度的增加而增加。正交实验结果表明,影响因素最大的是榕树叶的投加量,最小为振荡温度。当榕树叶粉末投加量为0.21g、振荡温度为40℃、吸附时间为315min时,改性榕树叶对水中30μg·m L^(-1)亚铁离子的去除率,最高可达98.75%。整个吸附过程很好地遵循了准二级动力学模型和Freundlich吸附等温式,以物理吸附为主。经改性榕树叶处理后的废水,符合电镀铁污染物排放标准和城镇下水道末端污水水质A级排放标准。改性榕树叶作为一种新型生物吸附剂,用于处理含亚铁离子的废水,可实现以废治废和节能减排,在环境治理领域将体现良好的经济和环境效益。The high content of ferrous ions in wastewater from mining and other industries was harmful to human health.Single factor,orthogonal,kinetic and isothermal adsorption experiments were designed to study the adsorption effect of modified banyan leaves on ferrous ions in wastewater.The results of single factor experiment showed that the removal rate of ferrous ion in wastewater increased with the increase of banyan leaf dosage,oscillation time and oscillation temperature.The orthogonal experiment showed that the largest influence factor was the dosage of banyan leaves and the smallest was the oscillation temperature.When the dosage of banyan leaf powder was 0.21g,the oscillation temperature was 40℃ and the adsorption time was 315min,the removal rate of 30 μg/m L ferrous ion in water could reach 98.75%.The whole adsorption process well followed the quasi second-order kinetic model and Freundlich adsorption isotherm,mainly physical adsorption.The wastewater treated with modified banyan leaves met the discharge standard of electroplating iron pollutants and a discharge standard of sewage quality at the end of urban sewers.Modified banyan leaves was applied as a new biosorbent to treat ferrous ion containing wastewater,could achieve waste treatment,energy conservation and emission reduction,and would reflect good economic and environmental benefits in the field of environmental treatment.

关 键 词：改性榕树叶 亚铁离子 正交实验 物理吸附 

分 类 号：X703[环境科学与工程—环境工程]