In situ phytoextraction of Mn and NH4+- from aqueous electrolytic manganese residue solution by Pistia stratiotes: : Effects of Fe/Co presence and rhizospheric microbe synergistic involvement

被引：2

作者：

Jiang, Lu ^{[1
,2
,3
,4
,5
]}

Tang, Yankui ^{[1
,2
,3
,4
,5
]}

Lu, Yanyi ^{[1
,2
,3
,4
,5
]}

Chen, Xinyu ^{[1
,2
,3
,4
,5
]}

Wu, Xinying ^{[1
,2
,3
,4
]}

Luo, Penghong ^{[1
,2
,3
,4
,5
]}

Shiels, Holly Alice ^{[6
]}

机构：

[1] Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China

[2] Guangxi Univ, Sch Resources Environm & Mat, Guangxi Key Lab Proc Nonferrous Met & Featured Mat, Nanning 530004, Peoples R China

[3] Guangxi Univ, Sch Resources Environm & Mat, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Nanning 530004, Peoples R China

[4] Guangxi Univ, Educ Dept Guangxi Zhuang Autonomous Reg, Key Lab Environm Protect, Nanning 530004, Peoples R China

[5] Guangxi Univ, Guangxi Key Lab Emerging Contaminants Monitoring E, Nanning 530004, Peoples R China

[6] Univ Manchester, Fac Biol Med & Hlth, Div Cardiovasc Sci, Manchester M13 9PL, England

来源：

ENVIRONMENTAL POLLUTION | 2024年 / 355卷

基金：

中国国家自然科学基金;

关键词：

Mn-hyperaccumulator; Phytoextraction; Biogenic manganese oxides; Floating aquatic plant; WASTE-WATER TREATMENT; OXIDES; PLANTS;

D O I：

10.1016/j.envpol.2024.124177

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The electrolytic manganese industry produces a large amount of electrolytic manganese residue (EMR). Soluble Mn, NH4+-N, 4 +-N, and other pollutants may be released from the open-air stacked EMR and transported to the environment along with rainfall or surface runoff. Aqueous EMR solution (AES) generally contains various elements required for plant growth, and phytoremediation can be applied to remove these pollutants from AES. Since the contents of Fe and Co vary greatly in AES depending on the ore sources as well as the pre-treatment processes, the presence of bioavailable Fe and Co at different levels may affect plant growth, the rhizosphere microbes, and pollutant removal. The present study investigated the in-situ removal of Mn(II) and NH4+-N 4 +-N from AES solution using free floating aquatic plant Pistia stratiotes, , focusing especially on the effects of Fe/Co presence and rhizospheric microbe synergistic involvement on contaminant removal. The results showed that 69.08% of Mn and 94.99% of NH4+-N 4 +-N were removed by P. stratiotes in 24 d. Both the presence of Fe(II) and Co(II) facilitated the Mn (II) immobilization and increased Mn(II) removal by 19-31% due to the enhanced peroxidase activity and the increased Mn accumulating in roots The complete removal of Mn from AES was found in the presence of Fe(II) at 2 mg L- 1 or Co(II) at 0.5 mg L- 1 and more than 51% accumulated Mn in the roots was stored in the vacuole and cytoplasm. BioMnOx x was found on the surface of the roots, revealing that rhizofiltration, rhizospheric plaque/ biofilm formation, and Mn biogeochemical cycle exert synergic effects on Mn(II) immobilization. The findings of the present study demonstrate the feasibility of using P. stratiotes in the treatment of aqueous EMR solutions and the presence of an appropriate amount of bio-available Fe and Co can promote the removal of Mn(II) and NH4+-N. 4 +-N.

引用

页数：13