| 摘要: |
| 为探索碳化时间对生物炭氮磷吸附解吸的影响，以园林废弃树枝和树叶为原料，在碳化时间
为 2、3、4、5 h 下制备的生物炭为吸附剂对不同浓度梯度的氮磷溶液进行吸附试验，结果表明：(1) 随着
碳化时间的延长树枝生物炭对磷的吸附量基本保持在 0.4 mg · g-1 左右，但随着磷浓度的升高，各生物炭
对磷的吸附能力均有所增强，其中碳化时间为 3 h 和 4 h 的树枝生物炭对磷的吸附能力增长更为明显；树
叶生物炭对磷的吸附能力随碳化时间的延长而增大，且随着磷浓度的升高；而增强当碳化时间为 5 h 时，
树枝生物炭和树叶生物炭对铵态氮的吸附效果最佳；树叶生物炭对氮磷的吸附能力高于树枝生物炭。(2)
随着碳化时间的延长，树枝生物炭对磷的解吸率基本保持在 46%~66% 之间；树叶生物炭则随着碳化时间
的延长对磷的解吸能力而降低，而碳化时间则对生物炭的铵态氮解吸效果无显著影响；树枝生物炭和树
叶生物炭对铵态氮的解吸率分别在 31.58%~56.68% 和 12.77%~28.29% 之间。 |
| 关键词: 园林废弃枝叶 碳化时间 生物炭 氮磷吸附 氮磷解吸 |
| DOI： |
| 投稿时间：2020-05-25修订日期：2020-08-11 |
| 基金项目: |
|
| Study on the Adsorption and Desorption of Nitrogen and Phosphorus by Biochar Prepared from Garden Waste Branches and Leaves in Different Carbonization Time |
| TIAN Xue,ZHOU Wenjun,ZHENG Weiguo,GAO Yuhui,CAO Huaying |
| (Shenzhen Wenke Landscape Co. Ltd．) |
| Abstract: |
| In order to explored the effection of carbonization time for biochars, we usd garden waste
branches and leaves as raw materials, and the biochars which prepared at 2 h, 3 h, 4 h, and 5 h as the adsorbent
to adsorbed and desorbed NH4+
and PO4
3- in waste water at different concentration. The result indicated that the
adsorption capacity of branch biochar for PO4
3- was about 0.4 mg · g-1. However，the adsorption efficiency of
efficiency of branch biochar for PO4
3- increased with the rising of the initial concentration.And the adsorption
capacity of branch biochar with carbonization time of 3 h and 4 h for PO4
3- increased significantly. Besides，the
adsorption efficiency of leaf biochar for PO4
3- increased with the rising of carbonization time, and it aslo increased
with the initial concentration.All of the biochars which carbonization time was 5 h had the strongest adsorption
efficiency of NH4+
.Furthermore，the adsorption efficiency of leaf biochar for PO4
3- and NH4
+ was higher than
that of the branch biochar.With the extension of carbonization time ,the desorption rate of PO4
3- was between
46%~66%.The desorption efficiency of leaf biochar for PO4
3- decreased with the rising of carbonization time.It was no significant effect on the desorption capacity of biochar for NH4+
with the rising of carbonization time.
And the desorption rate of PO4
3- for branch and leaf biochars were between 31.58%~56.68% and12.77%~28.29%
respectively. |
| Key words: garden waste branches and leaves carbonization time biochar nitrogen and phosphorus adsorption nitrogen and phosphorus desorption |
