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Cleaning and Management of Water Contaminated with Pesticides through the Process of Adsorption in the Natural Clay of Brari

Behrami Esad, Berbatovci Isak, Xhaxhiu Kledi, Isak Nensi, Andoni Adelaida, Reka Arianit, Hamiti Xhuljeta, Musliu Zehra Hajrulai, Uzunov Risto

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 2

281--291

This study aimed to investigate the potential for widespread application of clay in the purification of water polluted with pesticides and water management through the absorption and desorption of dimethoate and methomyl in the natural clay of Brari (Tirana). While the maximum adsorption of methomyl on Brari clay was reached in 12 hours, the maximum adsorption of dimethoate on Brari clay was reached in 48 hours. To compare the adsorption of methomyl and dimethoate on Brari clay, their water degradation time was also taken into account. Dimethoate dissolves quickly; a contact period of 1–2 hours is sufficient to desorb 81.2% of the material. Dimethoate dissolves in water at 25 °C and has a half-life t1/2 = 30 days. Methomyl is desorbed even faster; in just two hours, 96.2% of the material is desorbed. At 25 °C, dimethoate has a half-life of t1/2 = 14 days and a high solubility of 58 g/L in water. Because methomyl and dimethoate bind poorly to clay, they can contaminate surface and groundwater.

Effect of activated carbon on methomyl poisoning by urine metabolomics base on gas chromatography–mass spectrometry

Li L., Hu L., Chen B., Dong Y., Lin Z., Wang Z., Wen C., Wang X., Wang S.

Acta Chromatographica

2018

Vol. 30, no. 1

21--25

In this study, we developed a urine metabolomic method by gas chromatography–mass spectrometry (GC–MS) combination with biomedical results to evaluate the effect of activated carbon on methomyl poisoning rats. The rats were divided into four groups, methomyl group, two activated carbon treatment group, and control group. According to the biochemical results, it indicated that activated carbon treated rats could cause liver and kidney function changes. According to the urine metabolomics results, activated carbon treatment group (10 min) and activated carbon treatment group (30 min) could be distinguished from methomyl group, and activated carbon treatment group (10 min) could be separated from activated carbon treatment group (30 min) rats, which indicated that the treatment of rats by activated carbon in different time had a different effect. The results indicate that metabolomic method by GC–MS may be useful to elucidate activated carbon treated on methomyl poisoning rats.