Influence of wastewater type in the effects caused by titanium dioxide nanoparticles in the removal of macronutrients by activated sludge
文献类型：期刊论文
| 作者 | Cervantes-Aviles, Pabel; Saber, Ayman N.; Mora, Abrahan; Mahlknecht, Jurgen; Cuevas-Rodriguez, German |
| 刊名 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
 |
| 页码 | - |
| 关键词 | TiO2 Nanoparticles Elemental mapping Nanotoxicology Nitrification |
| ISSN号 | 0944-1344 |
| 英文摘要 | The imminent arrival of nanoparticles (NPs) to the wastewater treatment plants (WWTP) brings concern about their effects, which can be related to the wastewater composition. In this work, the effects of titanium dioxide (TiO2) NPs in the removal of carbon, nitrogen, and phosphorus by activated sludge bioreactors during the treatment of synthetic, raw, and filtered wastewaters were evaluated. Floc size, compaction of sludge, and morphological interactions between sludge and NPs were also determined. The main effect of TiO2 NPs was the inhibition of up to 22% in the removal of ammonia nitrogen for all types of wastewaters. This effect is strong dependent on combined factors of TiO2 NPs concentration and content of organic matter and ammonia in wastewater. The removal of dissolved organic carbon was affected by TiO2 NPs in lower level (up to 6%) than nitrogen removal for all types of wastewaters. Conversely to adverse effects, the removals of orthophosphate in the presence of TiO2 NPs were improved by 34%, 16%, and 55% for synthetic, raw, and filtered wastewater, respectively. Compaction of the sludge was also enhanced as the concentrations of NPs increased without alterations in the floc size for all types of wastewaters. Based on TEM and STEM imaging, the main interaction between TiO2 NPs and the activated sludge flocs was the adsorption of NPs on cell membrane. This means that NPs can be attached to cell membrane during aerobic wastewater treatment, and potentially disrupt this membrane. The effects of TiO2 NPs on macronutrient removal clearly depended on wastewater characteristics; hence, the use of realistic media is highly encouraged for ecotoxicological experiments involving NPs. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45955]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Agr Res Ctr, Pesticide Residues & Environm Pollut Dept, Cent Agr Pesticide Lab, Giza 12618, Egypt 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Natl Engn Lab Ind Wastewater Treatment, Beijing 100085, Peoples R China 3.Tecnol Monterrey, Escuela Ingn & Ciencias, Via Atlixcayotl 5718, Puebla 72453, Pue, Mexico 4.Univ Guanajuato, Dept Civil & Environm Engn, Engn Div, Av Juarez 77, Guanajuato 36000, Gto, Mexico 5.Tecnol Monterrey, Escuela Ingn & Ciencias, Eugenio Garza Sada 2501, Monterrey 64149, Nuevo Leon, Mexico |
| 推荐引用方式 GB/T 7714 | Cervantes-Aviles, Pabel,Saber, Ayman N.,Mora, Abrahan,et al. Influence of wastewater type in the effects caused by titanium dioxide nanoparticles in the removal of macronutrients by activated sludge[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH:-. |
| APA | Cervantes-Aviles, Pabel,Saber, Ayman N.,Mora, Abrahan,Mahlknecht, Jurgen,&Cuevas-Rodriguez, German. |
| MLA | Cervantes-Aviles, Pabel,et al."Influence of wastewater type in the effects caused by titanium dioxide nanoparticles in the removal of macronutrients by activated sludge".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH |
入库方式： OAI收割
来源：生态环境研究中心
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