Removal effects of different emergent-aquatic-plant groups on Cu, Zn, and Cd compound pollution from simulated swine wastewater

文献类型： 外文期刊

第一作者： Wang, Wei

作者： Wang, Wei;Cui, Jian;Fan, Xiangyang;Wang, Wei;Cui, Jian;Li, Jinfeng;Du, Jinmeng;Chang, Yajun;Cui, Jianwei;Liu, Xiaojing;Yao, Dongrui;Wang, Wei;Cui, Jian;Li, Jinfeng;Chang, Yajun;Cui, Jianwei;Liu, Xiaojing;Yao, Dongrui;Du, Jinmeng

作者机构：

关键词： Emergent aquatic plants; Plant configuration; Compound heavy metals; Removal efficiency; Swine wastewater

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）

ISSN： 0301-4797

年卷期： 2021 年 296 卷

页码：

收录情况： SCI

摘要： Aquatic plants play effective in removing heavy metal (HM) as a prominent factor of bioremediations, however, there are still knowledge gaps in species selection and configuration for high removal efficiency (RE) of compound HM and ornamental value. In this study, seven emergent-aquatic-plant species were configured into seven groups and planted in a simulated swine wastewater (SW) with Cu, Zn, and Cd for 75 days in summer. REs of Cu, Zn, and Cd were 45.06-86.93%, 42.40-87.22%, and 73.85-85.52% at day 75, respectively. Higher REs were observed from day 30-45 for Cu and Zn, whereas days 15-30 for Cd. The synergistic removal of Zn and Cu or Zn and Cd was almost observed (p < 0.05). The configuration of G5 (S. tabernaemontani, I. sibirica, and P. cordata) was generally efficient roles in the removal at day 45, with REs of 85.14%, 87.06%, and 83.56% for Cu, Zn, and Cd, respectively. The dry weight of roots, water NH4+-N, temperature, pH, and dissolved oxygen acted on heavymetal removal. During days 45-75, concentrations of Cu, Zn, and Cd in G5 were 0.52-0.66, 0.54-0.65, and 0.23-0.33 mg L-1. The former two were below the limits of Grade II (1.0 mg L-1) and the latter was above the limits of Grade V (0.1 mg L-1; GB3838-2002). Thus, G5 could be optimal for Cu and Zn removal from simulated SW, however, efficient Cd removal is required to ensure efficient SW recycling.

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