会议名称：
18th Annual World Environmental and Water Resources Congress of the Environmental-and-Water-Resources-Institute (EWRI)
会议时间：
JUN 03-07, 2018
会议地点：
Minneapolis, MN
会议主办单位：
[Duan, Zhiyong;Xie, Shuibo;Chen, Zhenfu;Wang, Jingsong;Li, Zhi] Univ South China, Sch Civil Engn, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
World Environmental and Water Resources Congress 2018: Water, Wastewater, and Stormwater; Urban Watershed Management; Municipal Water Infrastructure; and Desalination and Water Reuse
摘要：
Constructed wetlands technology is an important type of wastewater treatment technologies. Compared with other wastewater treatment technologies, the aquatic plants are special components in constructed wetlands for water pollutants removal. However, the comprehensive functions of aquatic plants in constructed wetlands were little emphasized before. In this study, the comprehensive functions and effects of aquatic plants in constructed wetlands to the water pollutants removal are investigated. Multiple common used aquatic plants are compared with their biomass, nitrogen and phosphorus absorption capacity, and oxygen secretion by root systems. These are used to investigate the mechanisms of the functions of aquatic plants in water pollutants removal in constructed wetlands. In this study it is found different types of aquatic plants have different comparable advantages in biomass, nitrogen and phosphorus absorption capacity, and oxygen secretion by root systems. The aquatic plants in constructed wetlands provide dissolved oxygen to the environment around their roots. The aquatic plants themselves have absorption for the nitrogen and phosphorus to directly removal them from the wastewater. Their roots together with the fillers in the constructed wetlands establish the habitat environment for the microorganisms which degrade the water pollutants. The aquatic plants play important and special roles in constructed wetlands for wastewater treatment. These findings can be used for the improvement of the water pollutants removal efficiency in constructed wetlands. The improved constructed wetlands can be used for eutrophication control with higher efficiency.
作者机构：
[刘红娟; 谢水波] Institute of Nuclear Science and Technology, University of South China, Hengyang;Hunan;421001, China;Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang;[张希晨; 刘迎九; Zeng, Tao-Tao] Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang
通讯机构：
[Xie, S.-B.] I;Institute of Nuclear Science and Technology, University of South China, Hengyang, Hunan, China
期刊：
IOP Conference Series: Earth and Environmental Science,2018年170(5) ISSN：1755-1307
通讯作者：
Xie, S.
作者机构：
School of Civil Engineering, University of South China, Hengyang, China;Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
通讯机构：
School of Civil Engineering, University of South China, Hengyang, China
期刊：
Paper Asia,2018年2018(Compendium3):74-78 ISSN：0218-4540
通讯作者：
Liang, Y.
作者机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, 421001, China;Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
通讯机构：
Institute of Botany, Chinese Academy of Sciences, Beijing, China
摘要：
Arbuscular mycorrhizal fungi (AMF) are symbiotic partner of plants and are important for survival and growth of plants under stresses. Three AMF species were inoculated to Lolium Perenne L. and plant performances in uranium contaminated and uncontaminated soils. The results show that (1) AMF inoculation improved the uranium resistance of Lolium Perenne, and increased photosynthetic pigments and soluble protein content and decreased MDA content were found in AMF inoculation treatments. (2) Antioxidant system enzyme activity in vivo Lolium Perenne also increased. (3) Uranium accumulation characteristics varied in three AMF inoculation treatments, indicating that different mechanisms of AMF species may be involved in response to uranium stress.
作者机构：
[Xie, Shuibo; Gao, Xiang; Zeng, Taotao; Wang, Guohua; Zhang, Shiqi] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang, Peoples R China.;[Zeng, Taotao; Lens, Piet N. L.] UNESCO, IHE Inst Water Educ, Delft, Netherlands.;[Xie, Shuibo] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Peoples R China.
通讯机构：
[Zeng, Taotao] U;Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang, Peoples R China.;UNESCO, IHE Inst Water Educ, Delft, Netherlands.
关键词：
Uranium;Anaerobic granular sludge;Bacterial community composition;High-throughput sequencing
摘要：
To improve the oxidation rate of high-sulfur and high-arsenic refractory gold concentrate (HGC), a two-stage chemical-biological oxidation approach, which contained a high-temperature chemical oxidation stage (ferric leaching stage) and a subsequent biological oxidation stage with mesophiles, was used in this experiment. The surface analysis of pure arsenopyrite using scanning electron microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) indicated that the surface lattice structure was partly disrupted after chemical oxidation; as a result, the subsequent biological oxidation rate during the second stage improved significantly. The extraction levels of Fe, As and S were 49.8%, 50.4% and 51.0%, respectively, in the normal biological oxidation system, while the values increased to 63.3%, 64.2% and 63.3%, respectively, following the two-stage process. Accordingly, the recovery rate of gold increased by 16.8% using the two-stage process compared to that of the one-stage biological oxidation approach.
作者机构：
[Zeng, Tao-Tao] Postdoctoral Research Centre of Mining Engineering, University of South China, Hengyang, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of south China, Hengyang, China;[马华龙; 刘迎九; 谢水波; 鲁慧珍; Zeng, Tao-Tao; 荣丽杉; 刘金香] Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
通讯机构：
Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
作者机构：
[谢水波; 刘迎九; 荣丽杉; 杨金辉; 杨瑞丽; 唐海琼] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China
作者机构：
[唐振平; 谢水波; 史冬峰; 黄华勇; Zeng, Tao-Tao] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China
