Sustainable and Clean Approach to Remove High Toxicity Element from High-Value Waste Selenium Material

Author(s):  
Huan Luo ◽  
GuoZheng Zha ◽  
Lang Liu ◽  
WenLong Jiang ◽  
TianTian Zhen ◽  
...  
Keyword(s):  
2013 ◽  
Vol 12 (3) ◽  
pp. 239-247

The removal of heavy metals from wastewaters is a matter of paramount importance due to the fact that their high toxicity causes major environmental pollution problems. One of the most efficient, applicable and low cost methods for the removal of toxic metals from aqueous solutions is that of their adsorption on an inorganic adsorbent. In order to achieve high efficiency, it is important to understand the influence of the solution parameters on the extent of the adsorption, as well as the kinetics of the adsorption. In the present work, the adsorption of Cu(II) species onto TiO2 surface was studied. It was found that the adsorption is a rapid process and it is not affected by the value of ionic strength. In addition, it was found that by increasing the pH, the adsorbed amount of Cu2+ ions and the value of the adsorption constant increase, whereas the value of the lateral interaction energy decreases.


2017 ◽  
Vol 68 (1) ◽  
pp. 175-179
Author(s):  
Oana Roxana Chivu ◽  
Augustin Semenescu ◽  
Claudiu Babis ◽  
Catalin Amza ◽  
Gabriel Iacobescu ◽  
...  

Rainfall is a major component of the environment and the main source of the air purification becouse of many pollutants increases who have the most varied sources: various human activities including industry and agriculture, and some household duties. Air purification by means of precipitation is achieved by numerous highly complex mechanisms. The final products of degradation of the pollutant in the air, which are generally harmless, can be reacted with each other in the presence of water, giving rise to the final compounds with a high toxicity. Thus, exhaust, mobile sources of noxious almost identical to those specific activities in the industrial processing of oil, contain lead which is the ideal catalyst for converting SO2 to sulfuric acid in the presence of rainwater, with all the disadvantages that they create. This paper will present an experimental research oabout how rainfall water quality is influenced by the activity of the industrial processing of oil, in a chemical plant in Constanta County.


Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3464
Author(s):  
Anjaramampionona Henintsoa Duvale Solofomalala ◽  
Clara Fredeline Rajemiarimoelisoa ◽  
Randriamampianina Lovarintsoa Judicael ◽  
Hanitra Ranjana Randrianarivo ◽  
Danielle Aurore Doll Rakoto ◽  
...  

Seeds of Crotalaria cleomifolia (Fabaceae) are consumed in Madagascar in preparation of popular beverages. The investigation of extracts from the seeds of this species revealed the presence of high amounts of alkaloids from which two pyrrolizidine-derived alkaloids were isolated. One of them was fully characterized by spectroscopic and spectrometric methods, which was found to be usaramine. Owing to the high toxicity of these alkaloids, issuing a strong warning among populations consuming the seeds of Crotalaria cleomifolia must be considered.


2021 ◽  
Vol 7 (2) ◽  
pp. 106
Author(s):  
Erika Seki Kioshima ◽  
Patrícia de Souza Bonfim de Mendonça ◽  
Marcus de Melo Teixeira ◽  
Isis Regina Grenier Capoci ◽  
André Amaral ◽  
...  

Paracoccidioidomycosis (PCM) is a notable fungal infection restricted to Latin America. Since the first description of the disease by Lutz up to the present day, Brazilian researchers have contributed to the understanding of the life cycle of this pathogen and provided the possibility of new targets for antifungal therapy based on the structural and functional genomics of Paracoccidioides. In this context, in silico approaches have selected molecules that act on specific targets, such as the thioredoxin system, with promising antifungal activity against Paracoccidioides. Some of these are already in advanced development stages. In addition, the application of nanostructured systems has addressed issues related to the high toxicity of conventional PCM therapy. Thus, the contribution of molecular biology and biotechnology to the advances achieved is unquestionable. However, it is still necessary to transcend the boundaries of synthetic chemistry, pharmaco-technics, and pharmacodynamics, aiming to turn promising molecules into newly available drugs for the treatment of fungal diseases.


2014 ◽  
Vol 466-467 ◽  
pp. 232-241 ◽  
Author(s):  
Fabianne Ribeiro ◽  
Julián Alberto Gallego-Urrea ◽  
Kerstin Jurkschat ◽  
Alison Crossley ◽  
Martin Hassellöv ◽  
...  

RSC Advances ◽  
2017 ◽  
Vol 7 (70) ◽  
pp. 44226-44233 ◽  
Author(s):  
Ji Wang ◽  
Ming-Fang He ◽  
Dalu Zhang ◽  
Ziyu Ren ◽  
Tian-shun Song ◽  
...  

Tetracycline (TC) is the second most commonly used antibiotic despite its high toxicity and persistence.


2017 ◽  
Vol 25 (11) ◽  
pp. 10383-10391 ◽  
Author(s):  
Giovanni Benelli ◽  
Marimuthu Govindarajan ◽  
Mohamad S. AlSalhi ◽  
Sandhanasamy Devanesan ◽  
Filippo Maggi

2012 ◽  
Vol 14 (1) ◽  
pp. 14
Author(s):  
Zilfa Zilfa ◽  
Hamzar Suyani ◽  
Safni Safni ◽  
Novesar Jamarun
Keyword(s):  

The research about the degradation of permethryn compound has been done by photolysis method using natural zeolyte as catalyst.Permethryn is one syntetic pyretroid pesticides that low toxicity for mammals but it is high toxicity for fishs, insects and water microorganisms.Zeolyte is aluminosilicate minerals that can be used for degradation of permethryn. Percentage degradation of permethryn is lower withoutzeolyte than using zeolyte as catalyst by photolysis method. 20 mg/l permethryn solution could be degraded 5.40% after 120 minutesirradiation, while by adding 0.20 g natural zeolyte, permethryn could be degraded 69.70


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