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Selenium (Se) is an essential metalloid and is categorized as emerging anthropogenic contaminant released to the environment. The rise of Se release into the environment has raised concern about its bioaccumulation, toxicity, and potential to cause serious damages to aquatic and terrestrial ecosystem. Therefore, it is extremely important to monitor Se level in environment on a regular basis. Understanding Se release, anthropogenic sources, and environmental behavior is critical for developing an effective Se containment strategy. The ongoing efforts of Se remediation have mostly emphasized monitoring and remediation as an independent topics of research. However, our paper has integrated both by explaining the attributes of monitoring on effective scale followed by a candid review of widespread technological options available with specific focus on Se removal from environmental media. Another novel approach demonstrated in the article is the presentation of an overwhelming evidence of limitations that various researchers are confronted with to overcome achieving effective remediation. Furthermore, we followed a holistic approach to discuss ways to remediate Se for cleaner environment especially related to introducing weak magnetic field for ZVI reactivity enhancement. We linked this phenomenal process to electrokinetics and presented convincing facts in support of Se remediation, which has led to emerge 'membrane technology', as another viable option for remediation. Hence, an interesting, innovative and future oriented review is presented, which will undoubtedly seek attention from global researchers.
Asunto(s)
Selenio , Selenio/análisis , Ecosistema , Contaminación AmbientalRESUMEN
Objective To improve the standardization and legitimacy of the quality control for traditional Chinese medicine (TCM) by analyzing the microscopic identification quality standard of TCM in Chinese Pharmacopoeia 2020 edition (Volume 1). Methods Through the analysis of the standard items of microscopic identification in Chinese Pharmacopoeia 2020 edition (Volume1), the problems in the standard was summarized and classified , and suggestions for revision were provided. Results The standardization and consistency have the room to improve in TCM microscopic identification standard in Chinese Pharmacopoeia 2020 (Volume 1). Conclusion The TCM microscopic identification standard needs to be improved, and the formulation for the standard should be more specific and practical.
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Objective To verify the feasibility and maneuverability of fast bare-handed vertical slicing method for dry Chinese herbal medicine, and to provide reference of this method for different types of medicinal materials. Methods Several representative medicinal herbs were randomly selected in the market to make micro-slices using the top-slicing method to observe its cutting effect. Results Experiments showed that microscopic slices can be obtained for most herbs in a few minutes, which can be used for identification and quality testing. Conclusion This method is fast, effective, simple and practical. It meets the requirements of pharmacopoeia for microscopic identification. This method deserves for promotion.
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<p><b>OBJECTIVE</b>To develop a quantitative method for determination of the total organic acids and salicyclic acid in the extract of Radix Isatidis.</p><p><b>METHOD</b>The total organic acids were determined by acid-base titration and the salicylic acid was determined by HPLC.</p><p><b>RESULT</b>It was shown that contents of total organic acids and salicylic acid in the extract of Radix Isatidis were 13.0% and 0.22%, respectively.</p><p><b>CONCLUSION</b>The method can control the quality of this extract effectively and accurately.</p>