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Study of aluminum phosphide levels in waste fumigants from food shipments following simple immersion treatment

Wu G., Chen T., Jia Y., Shen D., Feng H., Long Y.

Environment Protection Engineering

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2018

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Vol. 44, nr 1

19--27

EN

Increasing concentrations of aluminum phosphide (AlP) in waste fumigants and residues pose a serious threat to human health. This study focused on the effectiveness of the widely used simple immersion treatment for waste fumigants from shipments, which usually have a higher concentration of residual AlP. A field survey of an operational process was conducted followed by a quantitative analysis of the immersion treatment's hydrolytic effect on AlP. Further investigation on the safety of waste fumigants after the immersion treatment was conducted. It was found that the AlP concentration in the waste fumigant varied significantly with the sampling date, ranging from 12.93 +/- 0.67 wt. % to 29.50 +/- 1.18 wt. %. Simple immersion treatment could reduce the concentration of residual AlP in waste fumigants but the hydrolytic effect varied largely ranging from 19.5% to 31.9%. The concentration of residual AlP remained high (9.1-20.1 wt. %) after the immersion treatment. About 3.2-15.2 wt. % of AlP remained in the samples, following an additional 40 days of natural air-drying when phosphine gas release was not detected. The study indicates that conventional simple immersion treatment cannot ensure the complete hydrolysis of AlP from waste fumigants of shipments.

2

Hydrothermal synthesis and characterization of tube-structured ZnO needles

Li Y., Feng H., Zhang N., Liu C.

Materials Science Poland

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2009

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Vol. 27, No. 2

551--557

EN

Tube-structured ZnO needles were successfully synthesized hydrothermally, using H2O2 as the solvent, Zn (NO3)2o6H2O and NaOH as the starting materials and C19H42BrN as the additive. The samples were characterized by scanning electron microscopy, X-ray diffraction and room temperature photoluminescence measurements. The as-synthesized ZnO needle possesses a tube structure coiled by multilayer along the [0001] direction and a wurtzite structure. The intensity of the (0002) diffraction peak is obviously lower than the (10?0) and (10?1) peaks. Photoluminescence results reveal that the UV emission is restrained as hydrothermal temperature increases, and that the concentration of H2O2 has no influence on the photoluminesence when the concentration of H2O2 is higher than 10%.

3

On the relationships between indexes of merchant vessel accidents and indexes of economy and shipping

Zheng Z., Feng H., Li G.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2007

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Vol. 1, no. 4

441--444

EN

The statistics and analysis of the four accident indexes and the four marine transportation indexes have been carried out to indicate situations of marine safety and marine transportation in China. By grey correlation analysis, the main findings is that the number of marine traffic accidents is mainly determined by the number of merchant vessels; the number of foundering is mainly determined by freight amount, and the number of death and missing is mainly determined by the number of merchant vessels.