EVALUATION OF NIOWAVE'S PROPOSED SOLVENT WASHING APPROACH

An integrated system has been developed to remediate soils contaminated with pentachlorophenol (PCP) and polycyclic aromatic hydrocarbons (PAHs). This system involves the coupling of two treatment technologies, soil solvent washing and anaerobic biotreatment of the extract. Specifically, this study evaluated the effectiveness of the granular activated carbon (GAC) fluidized-bed reactor to treat a synthetic waste stream of PCP and four PAHs (naphthalene, acenaphthene, pyrene, and benzo(b)fluoranthene) under anaerobic conditions. This waste stream was intended to simulate the wash fluids from a soil washing process treating soils from a wood preserving site. The reactor achieved a removal efficiency of greater than 99.8% for PCP with conversion to its dechlorination intermediates ranging from 47% to 77%. Effluent, carbon extraction, and isotherm data also indicate that naphthalene and acenaphthene were removed from the liquid phase with efficiencies of 86% and 93%, respectively. Effluent levels of pyrene and benzo(b)fluoranthene were extremely low due to the adsorptive capacity of GAC for these compounds. Experimental evidence does not suggest that these compounds were chemically transformed within the reactor.

Download Full-text

The effect of organic solvent washing on the structure of hydrochar-based dissolved organic matters and its potential environmental toxicity

Environmental Science and Pollution Research ◽

10.1007/s11356-021-12517-5 ◽

2021 ◽

Author(s):

Guangping Fan ◽

Fei Tong ◽

Weiguo Zhang ◽

Gaoling Shi ◽

Wei Chen ◽

...

Keyword(s):

Organic Solvent ◽

Environmental Toxicity ◽

Organic Matters ◽

Dissolved Organic Matters ◽

Solvent Washing

Download Full-text

Demethanation Trend of Hydrochar Induced by Organic Solvent Washing and Its Influence on Hydrochar Activation

Environmental Science & Technology ◽

10.1021/acs.est.6b06594 ◽

2017 ◽

Vol 51 (18) ◽

pp. 10756-10764 ◽

Cited By ~ 16

Author(s):

Xiangdong Zhu ◽

Yuchen Liu ◽

Feng Qian ◽

Zhongfang Lei ◽

Zhenya Zhang ◽

...

Keyword(s):

Organic Solvent ◽

Solvent Washing

Download Full-text

Sunflower-Oil Wax Reduction by Seed Solvent Washing

Journal of the American Oil Chemists Society ◽

10.1007/s11746-007-1074-0 ◽

2007 ◽

Vol 84 (6) ◽

pp. 603-608 ◽

Cited By ~ 12

Author(s):

Erica R. Baümler ◽

Guillermo H. Crapiste ◽

Amalia A. Carelli

Keyword(s):

Sunflower Oil ◽

Solvent Washing

Download Full-text

Photo-Induced Black Phase Stabilization of CsPbI3 QDs Films

Nanomaterials ◽

10.3390/nano10081586 ◽

2020 ◽

Vol 10 (8) ◽

pp. 1586

Author(s):

Eider A. Erazo ◽

H.E. Sánchez-Godoy ◽

Andrés F. Gualdrón-Reyes ◽

Sofia Masi ◽

Iván Mora-Seró

Keyword(s):

Solar Cells ◽

Surface Defects ◽

Cubic Phase ◽

Main Process ◽

Layer By Layer ◽

Uv Treatment ◽

Photoelectrical Properties ◽

Layer Deposition ◽

Cell Stability ◽

Solvent Washing

α-CsPbI3 quantum dots (QDs) show outstanding photoelectrical properties that had been harnessed in the fabrication of perovskite QDs solar cells. Nevertheless, the stabilization of the CsPbI3 perovskite cubic phase remains a challenge due to its own thermodynamic and the presence of surface defects. Herein, we report the optimization of the CsPbI3 QDs solar cells, by monitoring the structure, the morphology and the optoelectronic properties after a precise treatment, consisting of the conventional solvent washing with a time limited ultraviolet (UV) exposure combination, during the layer-by-layer deposition. The UV treatment compensates the defects coming from the essential but deleterious washing treatment. The material is stable for 200 h and the PCE improved by the 25% compared with that of the device without UV treatment. The photo-enhanced ion mobility mechanism is discussed as the main process for the CsPbI3 QDs and solar cell stability.

Download Full-text

Influence of solvent washing on interlayer structure of alkylammonium montmorillonites

Applied Clay Science ◽

10.1016/j.clay.2012.03.001 ◽

2012 ◽

Vol 61 ◽

pp. 29-36 ◽

Cited By ~ 12

Author(s):

Wayne L. Elban ◽

John A. Howarter ◽

Mickey C. Richardson ◽

Paul E. Stutzman ◽

Aaron M. Forster ◽

...

Keyword(s):

Interlayer Structure ◽

Solvent Washing ◽

Influence Of Solvent

Download Full-text

The Flocculation and Stability of TiO2 Nanoparticles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.548.138 ◽

2012 ◽

Vol 548 ◽

pp. 138-142

Author(s):

Xiao Ying Liu ◽

Xiao Dong Hao ◽

Chun Xiang Gu ◽

Yu Xin Zhang ◽

Xin Lu Li ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Digital Camera ◽

Processing Conditions ◽

X Ray Diffraction ◽

Thermogravimetric Method ◽

X Ray ◽

Transmission Electron ◽

Potential Applications ◽

Solvent Washing

In this work, TiO2nanoparticles (NPs) were prepared through a well-developed hydrothermal method. The dry products were characterized by digital camera, transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetric method (TGA). These results suggested that TiO2NPs were well-crystallized and oleic acid-capped (OA-capped; 33.42 wt.%). In order to investigate the flocculation and stability of TiO2NPs colloids, redispersed experiments were carried out by altering the preparative parameters (e.g., redispersion solvent, washing times). In addition, the compounding stability of TiO2NPs colloids with AuNPs colloids and MnO4-solution under processing conditions (e.g., aging with stirring and under UV irradiation) were also studied. In principle, systematic investigations of flocculation and stability of TiO2NPs will be useful for their potential applications including novel photocatalysts and biosensors.

Download Full-text