文献类型：期刊文献

英文题名：Enhanced removal performance and mechanism of NH4+/NO3-?in Starch-FeS-biochar-amended vertical flow constructed wetlands under Pb stress

作者：Wang, Hai[1];Chen, Qian[1];Liu, Renrong[1];Xia, Haixin[1];Zhang, Yaohong[1]

机构：[1]Shaoxing Univ, Sch Life & Environm Sci, Sch Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Zhejiang, Peoples R China

年份：2023

卷号：55

外文期刊名：JOURNAL OF WATER PROCESS ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001066784500001)、、Scopus(收录号：2-s2.0-85169303527)、WOS

基金：This research was supported by the Joint Funds of the Zhejiang Provincial Natural Science Foundation of China under Grant No. LZY21C030001, National Natural Science Foundation of China under Grant No. 31500321 and Open Funds of Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process (jxhxpctgytdjs2305).

语种：英文

外文关键词：Constructed wetland; SFSP composite; Co-polluted wastewater; N removal; Microbial community

外文摘要：The co-pollution of nitrogen (N) and lead (Pb) is one of the most serious environmental issues, and the coexistence of Pb increases the difficulty of N removal. Biochar has been proven to be efficient for promoting N removal in constructed wetlands (CWs). However, the knowledge regarding key removal pathways of N and responses of plant physiological activities and microbial community is far insufficient in modified-biochar-added CWs. Therefore, Starch-FeS@PSB biochar (SFSP) was added to vertical flow CWs serving as functional substrate to enhance N removal efficiency under Pb stress, and its mechanism on N and Pb removal was also analyzed. Results showed that adding SFSP to CWs enhanced the nitrification and denitrification intensity of ICW2, and increased removal efficiencies of NO3 -N, NH4+-N and TN by 50.77 %, 35.90 % and 43.71 %, respectively. SFSP cooperated with anammox bacteria and denitrifying bacteria enhanced the removal of N under Pb stress. Furthermore, SFSP alleviated Pb stress on Iris pseudacorus L. and increased the relative abundance of Thiobacillus, Candidatus Kuenenia, Sulfurimonas and Geobacter so as to promote microbial N removal. Therefore, SFSP can be used as an efficient and eco-friendly functional substrate in CWs to remediate N and Pb co-polluted wastewater.