[Emission Factors and Preliminary Emission Estimates of Air Pollutants from Ships at Berth in the Guangzhou Port].

Three large container vessels over a tonnage of 40×10 t at berth in the Guangzhou Port were selected for determination of air pollutants in exhausts from auxiliary engines to obtain fuel-based emission factors (EFs). The fuel-based EFs for vessels A, B, and C at berth were 3096, 3031, and 3028 g·kg, respectively, for CO; 61.8, 19.

Photodegradation of Mefenamic Acid in Aqueous Media: Kinetics, Toxicity and Photolysis Products.

The present study investigated the photolytic behavior and photodegradation products of mefenamic acid (MEF) under ultraviolet-C irradiation. The results demonstrated that the photodegradation of MEF followed pseudo-first-order kinetics and the direct photolysis quantum yield of mefenamic acid was observed to be 2.63 ± 0.

[UV photolysis of propranolol in aqueous solution: mechanism and toxicity of photoproducts].

This paper studied the phtodegradation behavior, mechanism and security of propranolol (PRO) in water under ultraviolet irradiation using the high pressure mercury lamp. The photodegradation mechanism was verified by reactive oxygen species (ROS) quenching method, and the photoproducts security was evaluated by luminescent bacteria toxicity test. The results showed that the rate of photolysis (k) of PRO decreased with increasing initial concentration, and showed a significant negative correlation (r2 > 0.

Photodegradation of ibuprofen under UV-Vis irradiation: mechanism and toxicity of photolysis products.

The photodegradation of ibuprofen (IBP) in aqueous media was studied in this paper. The degradation mechanism, the reaction kinetics and toxicity of the photolysis products of IBP under UV-Vis irradiation were investigated by dissolved oxygen experiments, quenching experiments of reactive oxygen species (ROS), and toxicity evaluation utilizing Vibrio fischeri. The results demonstrated that the IBP degradation process could be fitted by the pseudo first-order kinetics model.

[Photodegradation of naproxen in aqueous systems by UV irradiation: mechanism and toxicity of photolysis products].

This paper studies the degradation mechanism, the reaction kinetics and the toxicity of photolysis products of naproxen in waters under UV irradiation (120 W mercury lamp) by quenching experiments of reactive oxygen species (ROS), oxygen concentration experiment and toxicity evaluation using Vibrio fischeri bacteria. The results demonstrated that NPX could be degraded effectively by UV irradiation and the photolysis pathways was the sum of the degradation by direct photolysis and self-sensitization via ROS, and the contribution rates of self-sensitized photodegradation were 0.1%, 80.

Evaluation of an on-line coupled continuous flow liquid membrane extraction and precolumn system as trace enrichment technique by liquid chromatographic determination of bisphenol A.

An on-line coupled continuous flow liquid membrane extraction (CFLME) and C(18) precolumn system was developed for sample preconcentration in liquid chromatography determination. After preconcentration by CFLME, which is based on the combination of continuous flow liquid-liquid extraction and supported liquid membrane, bisphenol A (BPA) was enriched in 960 microl of 1 mol l(-1) NaOH used as acceptor. This acceptor was on-line neutralized and transported onto the C(18) precolumn where analytes were absorbed and focused.

[Joint acute toxicity of fipronil and bata-cypermethrin to protozoa community].

Compared with the toxicity test on single organism, the effects of toxic pollutants on organisms at community level are more reliable. The acute single and joint toxic effects of Fipronil and Bata-cypermethrin on freshwater protozoa community are studied in this paper. The results show that the 48h-LC50 of Fipronil and Bata-cypermethrin to the microbial community was 35.

Effect of ZnFe2O4 doping on the photocatalytic activity of TiO2.

The photocatalytic oxidation of the organic pollutants with the TiO2 as photocatalyst has been widely studied in the world, and many achievements have been got. The degradation of pollutants is highly related with the photocatalytic activity of TiO2. It is demonstrated that doping ions or oxides to TiO2 is one way to enhance the photocatalytic activity of TiO2.

Effect of CuO on the efficiency of sulfur capture of Ca-based compounds during coal combustion.

The efficiency of sulfur capture of CaO, Ca(OH)2 and CaCO3 as well as the effect of CuO on them were studied. Results showed that the efficiency of sulfur capture of Ca(OH)2 is the highest among these three compounds. When CuO was used with each of CaO, Ca(OH)2 and CaCO3 at the same time, the efficiency of all of them would rise, and that of Ca(OH)2 raise most.