改性生物炭材料原位修复污染底泥的效果

曹璟; 王鹏飞; 陈俊伊; 王书航; 杨国丽

doi:10.12153/j.issn.1674-991X.20200021

改性生物炭材料原位修复污染底泥的效果

doi: 10.12153/j.issn.1674-991X.20200021

曹璟^1,2,,
王鹏飞^2,3,*, ,,
陈俊伊^2,3,
王书航^2,3,
杨国丽¹

1.
河北建筑工程学院市政与环境工程学院
2.
中国环境科学研究院湖泊环境研究所
3.
湖泊水污染治理与生态修复技术国家工程实验室

详细信息

作者简介:
曹璟(1993—),女,硕士研究生,研究方向为吸附材料,1085376566@qq.com

通讯作者:
王鹏飞 E-mail: wangpf01@craes.org.cn

中图分类号: X524
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出版历程
- 收稿日期: 2020-02-17
- 刊出日期: 2020-07-20

Study on the effect of modified biochar materials on in situ remediation of contaminated sediments

CAO Jing^{1,2
,},
WANG Pengfei^{2,3,*
, ,},
CHEN Junyi^2,3,
WANG Shuhang^2,3,
YANG Guoli¹

1.
School of Municipal and Environmental Engineering, Hebei University of Architectural Engineering
2.
Institute of Lake Environment, Chinese Research Academy of Environmental Sciences
3.
National Engineering Laboratory for Lake Pollution Control and Ecological Restoration

More Information

Corresponding author: WANG Pengfei E-mail: wangpf01@craes.org.cn

摘要

摘要: 以芦苇为原材料,FeCl₃、AlCl₃、MgCl₂、KMnO₄为改性剂,制备4种改性生物炭,以未改性生物炭、活性炭、锁磷剂(Phoslock)为对照修复材料,研究了7种修复材料对嘉兴市城市河网和湖荡2种污染底泥向水中释放氨氮(NH₃-N)、硝氮( N $O 3 -$ -N)、溶解性总氮(DTN)、正磷酸盐( P $O 4 3 -$ -P)、溶解性总磷(DTP)及重金属离子的控制效果。结果表明:加入AlCl₃改性生物炭后,2种污染底泥释放到水中的NH₃-N、DTN、 P $O 4 3 -$ -P、DTP与重金属Ni、As浓度最大可降低17.42%、18.61%、91.23%、77.04%与72.13%、46.21%;加入FeCl₃改性生物炭后,2种污染底泥释放到水中的 P $O 4 3 -$ -P、DTP、As浓度最大可降低91.23%、92.59%、95.80%,但水中DTN、Ni浓度有所增加;加入MgCl₂和KMnO₄改性生物炭后,2种底泥释放到水中的氮、磷、Ni、As污染物浓度不减反增。AlCl₃改性生物炭能有效固定底泥中磷、Ni、As,可考虑作为污染底泥原位修复材料。
- 生物炭 /
- 底泥 /
- 污染物释放 /
- 氮 /
- 磷 /
- 原位修复
Abstract: To study the control effect of biochar material on the release of nitrogen, phosphorus and heavy metal pollutants, two kinds of polluted sediment samples were collected from the river network and lake in Jiaxing City. Four kinds of modified biochars were produced using reed as the biomass feedstock and FeCl₃, AlCl₃, MgCl₂ and KMnO₄ as modifiers, while unmodified biochar, activated carbon and Phoslock were used as reference materials. The control effects of the seven kinds of remediation materials on the release of ammonia nitrogen (NH₃-N), nitrate nitrogen ( NO $3 -$ -N) and total soluble nitrogen (DTN), orthophosphate ( P $O 4 3 -$ -P), total soluble phosphorus (DTP) and heavy metal ions into the water from the two kinds of polluted sediments were analyzed. The results showed that after adding AlCl₃modified biochar to the sediments, the concentrations of NH₃-N, DTN, P $O 4 3 -$ -P, DTP, Ni, As released into the water from the two sediments could be reduced by 17.42%, 18.61%, 91.23%, 77.04%, 72.13%, 46.21%, respectively, at the most. After adding FeCl₃ modified biochar, the concentrations of P $O 4 3 -$ -P, DTP and As released into the water from the two sediments could be decreased by 91.23%, 92.59% and 95.80%, respectively, but the concentrations of DTN and Ni in the water increased. After adding MgCl₂ and KMnO₄ modified biochar, the concentrations of nitrogen, phosphorus, Ni and As pollutants released into the water from the two sediments increased rather than decreased. In conclusion, AlCl₃ modified biochar could effectively fix phosphorus, Ni and As in sediments and thus be considered as a material for in situ remediation of contaminated sediment.
- biochar /
- sediment /
- pollutant release /
- nitrogen /
- phosphorus /
- in situ remediation

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