常压制备秸秆活性炭对水溶液中磷元素的吸附  

Adsorption of phosphorus from aqueous solution on activated stalk-carbon prepared under condition of atmosphere

作　　者：黄大成[1] 王惠松 邹亚娟[3] 许实[3] 赖奕坚[3] 杨金权[2] 

机构地区：[1]上海工程技术大学工程实训中心,上海201620 [2]嘉兴市环境保护监测站,嘉兴314000 [3]上海交通大学分析测试中心,上海200240

出　　处：《环境工程学报》2015年第3期1183-1188,共6页Chinese Journal of Environmental Engineering

基　　金：浙江省环保厅支持项目(2013B016)

摘　　要：开发了非真空制备秸秆活性炭的新方法,以稻草秸秆为原料,醋酸钙和氯化锌为活化剂,经热处理,一步合成改性秸秆活性炭。XRD图谱显示,产物为碳酸钙改性活性炭;SEM和TEM的表征结果显示,该活性炭具有微米-纳米多维孔结构,碳酸钙颗粒均匀分布在活性炭的表面和基体中;BET比表面积实验测得不同浓度碳酸钙改性活性炭的比表面积在324~846 m2/g之间。含磷水溶液吸附实验表明,当改性活性炭中碳酸钙含量为1.5%时,活性炭具有最大吸附速率1.76 L/mg;碳酸钙含量为2.0%时,活性炭具有最大吸附容量3.21 mg/g。改性活性炭对磷元素的吸附过程符合Langmuir模型,说明改性活性炭对磷的吸附为单分子层吸附。A new method was developed to prepare composite of Ca CO3/ activated carbon under the condition of atmosphere by one step,in which Ca( CH3COO)2and Zn Cl2 were adopted as activation agent. The prepared composite was characterized by XRD,SEM and TEM,showing that Ca CO3 particles were loaded on the activated carbon with multi-porous structure,moreover the composite had high specific surface area of 324 ~ 846m2/ g. The final sorbent was used for phosphorus removal,and the results showed that the hybrid containing1. 5% of Ca CO3 had the highest absorption rate of 1. 76 L / mg,while the largest adsorption capability was 3. 21 mg / g when the sorbent contained 2. 0% of Ca CO3. The absorption process fit Langmuir isotherm model well,which indicated that the process was monolayer adsorption.

关 键 词：常压 秸秆 活性炭 磷 吸附 

分 类 号：X52[环境科学与工程—环境工程] TQ424.1[化学工程]