Zhejiang Huanke Environment Consultancy Co.

Hangzhou, China

Zhejiang Huanke Environment Consultancy Co.

Hangzhou, China
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Sun Y.,Zhejiang University | Lou Z.,Zhejiang University | Yu J.,Zhejiang Huanke Environment Consultancy Co. | Zhou X.,Zhejiang University | And 4 more authors.
Chemical Engineering Journal | Year: 2017

Iron sulfide (FeS) nanoparticles were known for their excellent ability to scavenge aqueous Hg(II). However, the aggregation and oxidizability of FeS nanoparticles greatly restricted their practical application. This study developed an Al2O3-supported nanoscale FeS (FeS/Al2O3) which effectively optimized the material performance. Characteristic data suggested that FeS/Al2O3 (mass ratio of FeS to FeS/Al2O3 is 30%) with a large specific surface area (142.7 m2 g−1) could evenly distribute FeS, suppressing the aggregation of FeS successfully. The maximum enrichment capacity of Hg(II) on FeS/Al2O3 achieved ∼313 mg/g at pH 6 and 30 °C. The pH studies indicated that alkaline environment strongly inhibited mercury uptake, while removal rate of 1 mg/L Hg(II) maintained a high level (>97.5%) over the pH range of 3–9. However, FeS/Al2O3 loss was observed at low pH due to the acid corrosion. Additionally, the rates of Hg(II) reduction were almost unaffected over the range of 0.1–100 mM NaCl, but greatly inhibited by the presence of humid acid (HA). The synthetic FeS/Al2O3 remained high mercury removal efficiency (over 95% in 1 mg/L Hg(II)) and low iron dissolution rate when preserved for 30 days, showing good long-term stability and remarkable application potential. © 2017 Elsevier B.V.

Wang K.,Zhejiang University of Technology | Wang W.,Zhejiang Huanke Environment Consultancy Co. | Wang Y.,Zhejiang University of Technology | Xu D.,Zhejiang University of Technology
Acta Crystallographica Section E: Structure Reports Online | Year: 2013

In the title compound, C19H18ClNO3, the non-aromatic part of the fused ring system adopts an envelope conformation with the central methylene C atom as the flap. The dihedral angle between the pyridine and benzene rings is 56.98 (3)°. In the crystal, molecules are linked into double layers parallel to (100) by a network of weak C - H...O interactions.

Zang L.,Shanghai SHEInet Corporation | Zang L.,Low Carbon economics and Climate Change Center | Zhu J.,Shanghai SHEInet Corporation | Zhu J.,Low Carbon economics and Climate Change Center | Xia Y.,Zhejiang Huanke Environment Consultancy Co.
Journal of Materials Engineering and Performance | Year: 2014

The porous NiO nanofibers have been successfully synthesized by a simple process of hydrothermal treatment with subsequent calcination. The as-prepared porous NiO nanofibers, when applied as supercapacitor electrode exhibited a higher specific capacitance of 884 F/g with enhanced rate capability and good cycle stability. The excellent capacitive behaviors are mainly attributed to their unique configurations, which can not only provide high specific surface area but also greatly enhance the effective utilization of active materials as well as rapid ion/electron transportation. It is expected that such intriguing NiO porous nanofibers can serve as promising electrode materials for high-performance supercapacitors. © 2013 ASM International.

Yu J.,Ningbo University | Zhao Y.,Ningbo University | Ma X.,Zhejiang Huanke Environment Consultancy Co. | Bai C.,Henan University of Science and Technology
Desalination and Water Treatment | Year: 2016

Dewatering and settling are of great importance during activated sludge treatment. The activated sludge fetched from a thickening tank of the wastewater treatment plant was dosed with 0.01–0.10 M cations under mild thermal treatment below 100°C. Specific resistance to filtration and sludge volume index were measured to evaluate the dewaterability and settleability, respectively. Results show that dewaterability and settleability were deteriorated under mild thermal treatment, but improved markedly with the addition of cations, and advanced further together with mild thermal treatment, indicating that the cations transformed the effect of mild thermal treatment from deterioration to enhancement. Calcium and Fe3+ were found to be the most effective cations in strengthening the sludge dewatering and settling under mild thermal treatment, and could act immediately after the addition. It is speculated that the cations interact with the binding sites of the polymer substances and cells released by mild thermal treatment, forming polymer–cation–cell complexes, intensifying the flocs inner connection and inducing a superb aggregation. The dewaterability and settleability were thus enhanced by cations under mild thermal treatment. © 2015 Balaban Desalination Publications. All rights reserved.

Lu L.,Zhejiang University | Zhou M.-Y.,Zhejiang Huanke Environment Consultancy Co. | Yin L.,Zhejiang University | Zhou G.-W.,Zhejiang University | And 3 more authors.
Journal of Molecular Catalysis A: Chemical | Year: 2016

The initial pH value of hydrothermal reaction has a significant impact on the photocatalytic activity of BiOBr photocatalyst; however, the influence mechanism is still unclear. In this work, a series of BiOBr photocatalysts were prepared via a hydrothermal route at different initial pH values. Various methods were performed to investigate the effects of pH on the structure, composition, morphology, optical and electronic properties of the as-prepared samples. The results indicated that the increasing pH facilitated the nucleation of BiOBr, leading to the decrease of crystallite size. Moreover, due to the change of {001} facets exposure, the BiOBr nanosheets rotated to reduce the total surface energy of crystal and formed looser structure, even assembled into flower-like structure at pH 7. The photocatalytic activity evaluated by the degradation of bisphenol A (BPA) was positively correlated with the initial pH value. The BiOBr obtained at pH 7 exhibited the highest photocatalytic activity, whose rate constant was about 2.9, 1.9 and 1.5 times than that of BiOBr samples prepared at pH 1, 3 and 5, respectively. The enhanced photocatalytic activity of BiOBr was mainly attributed to the smaller crystallite size and looser structure. © 2016 Elsevier B.V.

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