Decomposition characteristics of three different kinds of aquatic macrophytes and their potential application as carbon resource in constructed wetland

Suqing Wu, Shengbing He, Weili Zhou, Jianya Gu, Jungchen Huang, Lei Gao, Xu Zhang

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Decomposition of aquatic macrophytes usually generates significant influence on aquatic environment. Study on the aquatic macrophytes decomposition may help reusing the aquatic macrophytes litters, as well as controlling the water pollution caused by the decomposition process. This study verified that the decomposition processes of three different kinds of aquatic macrophytes (water hyacinth, hydrilla and cattail) could exert significant influences on water quality of the receiving water, including the change extent of pH, dissolved oxygen (DO), the contents of carbon, nitrogen and phosphorus, etc. The influence of decomposition on water quality and the concentrations of the released chemical materials both followed the order of water hyacinth > hydrilla > cattail. Greater influence was obtained with higher dosage of plant litter addition. The influence also varied with sediment addition. Moreover, nitrogen released from the decomposition of water hyacinth and hydrilla were mainly NH3-N and organic nitrogen while those from cattail litter included organic nitrogen and NO3-N. After the decomposition, the average carbon to nitrogen ratio (C/N) in the receiving water was about 2.6 (water hyacinth), 5.3 (hydrilla) and 20.3 (cattail). Therefore, cattail litter might be a potential plant carbon source for denitrification in ecological system of a constructed wetland. The results suggested that cattail litter was more suitably utilized as carbon source for denitrification comparing with water hyacinth and hydrilla litter.

Original languageEnglish
Pages (from-to)1122-1133
Number of pages12
JournalEnvironmental Pollution
Volume231
DOIs
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

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