Effects and fate of TiO2 nanoparticles in the anaerobic treatment of wastewater and waste sludge

被引：58

作者：

Cervantes-Aviles, Pabel ^{[1
]}

Ida, Junichi ^{[2
]}

Toda, Tatsuki ^{[2
]}

Cuevas-Rodriguez, German ^{[3
]}

机构：

[1] Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, 2336 Brett Hall, Santa Barbara, CA 93106 USA

[2] Soka Univ, Dept Sci & Engn Sustainable Innovat, Fac Sci & Engn, 1-236 Tangi Machi, Hachioji, Tokyo 1928577, Japan

[3] Univ Guanajuato, Zona Ctr, Dept Civil & Environm Engn, Engn Div, Av Juarez 77, Guanajuato 36000, Gto, Mexico

来源：

JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2018年 / 222卷

关键词：

Anaerobic digestion; Extracellular polymeric substances; Methane; Titanium dioxide; Proteins; Polysaccharides; EXTRACELLULAR POLYMERIC SUBSTANCES; TITANIUM-DIOXIDE NANOPARTICLES; METAL-OXIDE NANOPARTICLES; ACTIVATED-SLUDGE; GRANULAR SLUDGE; NANOMATERIAL REMOVAL; TREATMENT PLANTS; STABILITY; COSMETICS; TOXICITY;

D O I：

10.1016/j.jenvman.2018.05.074

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The increasing use of TiO2 nanoparticles (NPs) in customer products has also increased the concerns about their effects in the environment. Anaerobic digestion is a process probably exposed to high concentrations of TiO2 NPs due to its application for wastewater and waste sludge treatment. In this work, it was studied the anaerobic digestion performance and the extracellular polymeric substances (EPS) production in presence of TiO2 NPs, as well as the fate of TiO2 NPs in anaerobic reactors. Results showed that methane production enhanced an average of 14.9% in presence TiO2 NPs, which is considered a positive effect. A strong affinity between TiO2 NPs and EPS was found, especially for proteins (PRO) and polysaccharides (PS) in the loosely and tightly bound EPS layers of microorganisms (LB-EPS and TB-EPS). Ti quantification indicated that 92% of the TiO2 NPs are removed by anaerobic sludge, while 8% remain in the treated effluent.

引用

页码：227 / 233

页数：7

共 34 条

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