Removal of Nitrogen and Phosphorus from Water by Biomass Carbon of Aquatic Plants

被引：0
|
作者：
Liu S.-L. [1 ]
Peng H.-J. [1 ]
Yang J.-Y. [1 ]
Xiao L. [1 ]
机构：
[1] State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing
来源：
Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 11期
关键词：
Adsorption; Aquatic plants; Modified biomass carbon; Nitrogen; Phosphorus;
D O I：
10.13227/j.hjkx.201905038
中图分类号：
学科分类号：
摘要：
In the bioremediation of eutrophic water, a large number of aquatic plants will be produced. How to continue the reasonable disposition is the question that needs to be solved. In this paper, biomass carbon was prepared from aquatic plants, and the adsorption capacity of the biomass carbon on nitrogen and phosphorus in water was improved by magnesium modification. The characterization results of material properties showed that magnesium modification not only formed nanometer MgO sheets on the surface of biomass carbon to increase the specific surface area, but also introduced hydroxyl functional groups to promote the adsorption of ammonium nitrogen. The adsorption processes of modified biomass carbon on nitrates and ammonium nitrogen belonged to multi-layer adsorption, and the adsorption isotherms conformed to the Freundlich model. The adsorption mechanism of modified biomass carbon changed from single layer adsorption to multi-layer diffusion. The maximum adsorption capacity of the modified biomass carbon on nitrate nitrogen, ammonium nitrogen, and phosphorus were 5.66, 62.53, and 90.92 mg•g-1, respectively. The adsorption capacity of the modified biomass carbon on ammonium nitrogen is 178 times that of unmodified biomass carbon. When phosphorus, nitrate nitrogen, and ammonium nitrogen coexist, the adsorption amounts of modified biomass carbon increase by 79.1%, 67.5%, and 47.1%, respectively. The results of this paper showed that the preparation of biomass carbon can realize the resource recovery of aquatic plants, and can be used for the removal of nitrogen and phosphorus pollution from water, which has good prospects for application. © 2019, Science Press. All right reserved.
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页码：4980 / 4986
页数：6
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  • [1] Le Moal M., Gascuel-Odoux C., Menesguen A., Et al., Eutrophication: a new wine in an old bottle?, Science of the Total Environment, 651, pp. 1-11, (2019)
  • [2] Ting W.H.T., Tan I.A.W., Salleh S.F., Et al., Application of water hyacinth (Eichhornia crassipes) for phytoremediation of ammoniacal nitrogen: a review, Journal of Water Process Engineering, 22, pp. 239-249, (2018)
  • [3] Alvarez-Rogel J., Del Carmen Tercero M., Arce M.I., Et al., Nitrate Removal and Potential Soil N<sub>2</sub>O Emissions in Eutrophic Salt Marshes with and without Phragmites australis, Geoderma, 282, pp. 49-58, (2016)
  • [4] Zhao D.H., Li J.J., Lv L.P., Et al., Effect of cadmium contamination on the eutrophic secondary pollution of aquatic macrophytes by litter decomposition, Journal of Environmental Management, 231, pp. 1100-1105, (2019)
  • [5] Manya J.J., Pyrolysis for biochar purposes: a review to establish current knowledge gaps and research needs, Environmental Science & Technology, 46, 15, pp. 7939-7954, (2012)
  • [6] Yuan P., Wang J.Q., Pan Y.J., Et al., Review of biochar for the management of contaminated soil: preparation, application and prospect, Science of the Total Environment, 659, pp. 473-490, (2019)
  • [7] Li J.X., Wu L.C., Zhang J., Et al., Research progresses in remediation of heavy metal contaminated soils by biochar, Ecology and Environmental Sciences, 24, 12, pp. 2075-2081, (2015)
  • [8] Zhu S.H., Zhao J.J., Yin Y.J., Et al., Application of goethite modified biochar for arsenic removal from aqueous solution, Environmental Science, 40, 6, pp. 2773-2782, (2019)
  • [9] Zhang C., Shan B.Q., Zhu Y.Y., Et al., Remediation effectiveness of Phyllostachys pubescens biochar in reducing the bioavailability and bioaccumulation of metals in sediments, Environmental Pollution, 242, pp. 1768-1776, (2018)
  • [10] Yang G.X., Jiang H., Amino modification of biochar for enhanced adsorption of copper ions from synthetic wastewater, Water Research, 48, pp. 396-405, (2014)
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