生态与农村环境学报2018，Vol.34Issue(3)：253-259,7.DOI:10.11934/j.issn.1673-4831.2018.03.009
2种改性生物炭对水体硝态氮的吸附特性
Effects of Two Kinds of Modified Biochar Adsorbing Nitrate-N in Water
摘要
Abstract
Two kinds of FeCl3modified biochar,prepared separately out of Typha angustifolia and Phragmites communis, two aquatic plants,were used as adsorbent and potassium nitrate solution was as adsorbate in this study to simulate removal of nitrate-N by biochar,and further to analyze adsorption kinetics and adsorption isotherm characteristics of the two modi-fied biochars and their originals,and explore effects of biochar application rate,adsorption duration,and initial concentra-tion and pH of the adsorbate on nitrate-N adsorption by the two biochars,with the aid of infrared spectroscopy(IR),scan-ning electron microscopy(SEM)and elemental assay. Results showed that nitrate-N adsorption of the two modified bio-chars fitted the pseudo-secondary adsorption kinetics. The maximum adsorption capacity qmof the FeCl3modified Typha angustifolia biochar(XP-Fe)and FeCl3modified Phragmites communis biochar(LW-Fe)was 15.55 and 10.63 mg· g-1,respectively. Reduced pH of the adsorbate facilitated nitrate-N adsorption by XP-Fe and LW-Fe. XP-Fe was higher than LW-Fe in nitrate-N adsorption capacity.关键词
水生植物/生物炭/硝态氮/改性/吸附特性Key words
aquatic plant/biochar/nitrate-N/modification/adsorption characteristics分类
资源环境引用本文复制引用
张文,吕欣田,韩睿,胡志新..2种改性生物炭对水体硝态氮的吸附特性[J].生态与农村环境学报,2018,34(3):253-259,7.基金项目
南京工程学院高层次人才科研启动基金(YKJ201624) （YKJ201624）
江苏省高等学校大学生创新创业训练计划(201611276044X) （201611276044X）
