Micro-polluted water source purification of root channel wetland in Jiaxing, China.

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Jianfeng Li, Shengsheng Han, Zekang He, Tianzheng Cao, Shanrui Han, Tianfei Li, Junjie Li, Juanhua Jia, Wenjing Qin, Ya He
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引用次数: 0

Abstract

Root channel wetlands, as a new type of nature-imitating wetland system, provide a paradigm for micro-polluted water source purification; however, there is a knowledge gap on root channel wetlands' pollution removal effects and their main influencing factors after longtime operation. This study collected the turbidity, ammonia nitrogen (NH3-N), total nitrogen (TN), total phosphorus (TP), permanganate index (CODMn), dissolved oxygen (DO), and chemical oxygen demand (COD) at the inlet and outlet of Shijiuyang (SJY) wetland and Guanjinggang (GJG) wetland in Jiaxing City, China, from 2019 to 2021. The results showed that root channel wetlands had better water quality improvement effects. The SJY wetland had larger removal rates for DO, CODMn, and turbidity compared with the GJG wetland. In contrast, other water quality indexes have similar removal rates at both wetlands. The influencing factor analysis showed that water purification agent, flow, pH, and water temperature have large influences on the removal rates of pollutants for both wetlands. To address high turbidity and excessive DO, which are the primary pollutants affecting the two wetlands, implementing the diversion river before the pretreatment area and incorporating ecological floating beds in the deep purification area are recommended solutions to mitigate these issues. Compared with conventional general constructed wetlands, root channel wetlands are a more cost-effective and sustainable technology. The research is conducive to improving understanding of root channel wetland purification for micro-polluted water sources and enhancing water supply security capability in the plains water network area of the Yangtze River Delta region. PRACTITIONER POINTS: Compared with conventional general constructed wetlands, root channel wetlands are more cost-effective and sustainable technology. The SJY wetland demonstrated better removal rates for DO, CODMn, and turbidity, indicating a higher purification capacity compared to GJG wetland. Flow rate and pH are the primary factors influencing the GJG wetland, while the waterpurification agent and water temperature are the main factors affecting water quality in the SJY wetland.

中国嘉兴根河湿地的微污染水源净化。
根河湿地作为一种新型的仿自然湿地系统,为微污染水源的净化提供了一种范例,但对根河湿地长期运行后的除污效果及其主要影响因素的认识尚属空白。本研究收集了2019年至2021年嘉兴市石臼漾(SJY)湿地和观景港(GJG)湿地进出水口的浊度、氨氮(NH3-N)、总氮(TN)、总磷(TP)、高锰酸盐指数(CODMn)、溶解氧(DO)和化学需氧量(COD)。结果表明,根渠湿地具有更好的水质改善效果。与观景港湿地相比,SJY 湿地对溶解氧、CODMn 和浊度的去除率更高。相比之下,两处湿地对其他水质指标的去除率相近。影响因素分析表明,净水剂、流量、pH 值和水温对两个湿地的污染物去除率影响较大。针对影响两处湿地的主要污染物--高浊度和溶解氧超标,建议在预处理区前设置导流河,并在深度净化区设置生态浮床,以缓解这些问题。与传统的一般构建湿地相比,根渠湿地是一种更具成本效益和可持续性的技术。该研究有助于加深对根系通道湿地净化微污染水源的认识,提高长三角平原水网地区的供水保障能力。实践点:与传统的一般建设湿地相比,根渠湿地是一种更具成本效益和可持续发展的技术。与 GJG 湿地相比,SJY 湿地对溶解氧、化学需氧量和浊度的去除率更高,表明其净化能力更强。影响 GJG 湿地的主要因素是流速和 pH 值,而影响 SJY 湿地水质的主要因素是净水剂和水温。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Water Environment Research
Water Environment Research 环境科学-工程:环境
CiteScore
6.30
自引率
0.00%
发文量
138
审稿时长
11 months
期刊介绍: Published since 1928, Water Environment Research (WER) is an international multidisciplinary water resource management journal for the dissemination of fundamental and applied research in all scientific and technical areas related to water quality and resource recovery. WER''s goal is to foster communication and interdisciplinary research between water sciences and related fields such as environmental toxicology, agriculture, public and occupational health, microbiology, and ecology. In addition to original research articles, short communications, case studies, reviews, and perspectives are encouraged.
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