Recommendations on Abolishing Detention Education System for Sex Workers and Their Clients in Mainland China.

Abstract Forthcoming

Field trials of phytomining and phytoremediation : a critical review of influencing factors and effects of additives

Plant-based technologies including phytomining, phytoextraction, phytodegradation, phytostabilization and phytovolatilization have drawn much attention during the last decade. To examine the feasibility of these nature-based solutions to accumulate, degrade, stabilize or volatize metal(loid)s and/or organic contaminants, an increasing number of field studies have been conducted. This review critically evaluates influencing factors in phytomining and phytoremediation approaches, including contaminant concentrations, fertilizer application and chelating agent addition, planting characteristics (e.g. plant density, seeding, cropping and harvesting methods), and soil properties (e.g. salinity, soil texture and soil pH). A proper trial design will assure the robustness of the results if these factors were taken into consideration seriously. We also summarized knowledge about additives used in field trials, especially biological waste-derived amendments such as biochar, compost, sewage sludge and manure. According to the literature reviewed, controversy remains whether these amendments can promote the plant performance. In addition, the utilization of microorganisms and transgenic plants in field trials, and the associated biosafety concerns such as horizontal gene transfer were discussed. Future research should examine the ecological risks associated with phytomining and phytoremediation (e.g. the secondary migration of contaminants due to improper handling of harvested plants). It is suggested that the results of field studies should guide commercial applications of phytomining and phytoremediation

Determination of Methamphetamine by High-Performance Liquid Chromatography in Odor-Adsorbent Material Used for Training Drug-Detection Animals

The objective of the present report was to develop and validate a simple, sensitive, and selective analytical method for the determination of methamphetamine in an odor-adsorbent material (gauze) which was used to improve and standardize the training method used for drug-detection animals. High-performance liquid chromatography (HPLC) was performed using a Spherisorb ODS2 C18 column (200 mm × 4.6 mm, 5 μm), with a mobile phase consisting of a 0.25% methanol/triethylamine aqueous solution (V:V = 20:80), the pH of which was adjusted to 3.1 using glacial acetic acid, at a flow rate of 1.0 mL/min. The column temperature was 25 °C, and the detection of the analytes was performed at a wavelength of 260 nm. Methamphetamine showed good linearity (R2 = 0.9999) in the range of 4.2~83.2 mg/mL. The stability of the test material was good over 24 h. The precision of the method was good, with an average spiked recovery of 86.2% and an RSD of 2.9%. The methamphetamine content in the gauze sample was determined to be 7.8 ± 2.2 μg/sample. A high-performance liquid chromatography (HPLC) method was optimized and validated for the determination of methamphetamine in adsorbent materials (gauze). Validation data in terms of specificity, linearity, the limit of detection and the limit of quantification, reproducibility, precision, stability, and recovery indicated that the method is suitable for the routine analysis of methamphetamine in adsorbent materials (gauze) and provided a basis for training drug-detection animals