Organochlorine Pesticide Residues in Soil and Edible Vegetable

Abstract

Intensive vegetable crops are stressed by the influence of a large number of chemicals, applied to stimulate fructification, ripening, fertilization, pathogen, pest and weed control. The purpose of this study was to highlight the impact and risk on soil and vegetable plants and products during treatments application with organochlorine pesticides, on three cultivation systems: conventional, organic and in-conversion. The objective of this study was to monitor the content of organochlorine pesticide (OCPs) residues and their remanence in vegetable crops from certain farms located in the Nort-eastern area of Romania. During the year 2011, a number of 20 OCPs residues have been actively analyzed from soil and edible vegetable samples. Although the organic farm is converted to organic system from 2006, residues of Endrin aldehyde were detected in soil samples. Residues of Gamma chlordane, Endosulfan I, Endosulfan II, Endosulfan sulfate and Endrin aldehyde have been detected in soil samples collected from conventional farms, but their concentrations were below the maximum limits allowed by EU legislation and national regulations. In all vegetable samples, the OCPs residues have been found at acceptable limits, according to the EC Regulation 396/2005. However, a careful monitoring of conventional crops would be opportune to avoid the risks of exceeding the maximum allowed limit for the products sold by small farmers on domestic market consumer products.

Plant growth promotion effect of plasma activated water on Lactuca sativa L. cultivated in two different volumes of substrate

“…Lettuce (Lactuca sativa L.) is one of the most consumed fresh vegetables in the world. It can be grown on soil or hydroponic conditions 31 . The common practice used to improve the yield is applying chemicals, but these are known to affect the environment 32 .…”

The purification performances of the lagooning process, case of the Beni Chougrane region in Mascara (Algerian N.W.)

“…found that an infinite amount of nitrate in surface water is related either to the increased algal growth in these sites [SLIM et al, 2005. BONCIU et al, 2018BONEA et al, 2018;GROZEA et al, 2017, STOLERU et al, 2016 , or to the joint "denitrification" phenomenon that converts NO3nitrate to N2 through the presence of nitrate organic material. Indeed, the dissolved phosphorus is not absorbed by living microorganisms and its content remains more or less unchanged in low oxygen environments.…”

Utilization of locally available binders for densification of rice husk for biofuel production

“…was found that during densification, the densities of rice husk increased from 0.196g/m 3 (196 kg/m 3 ) to between 513 kg/m 3 -765 kg/m 3 with GS as binder; 472-762 kg/m 3 with AAW as binder [BONEA et al, 2017, PENTEA et al, 2016, STOLERU et al, 2012 ; and 542 -786 kg/m 3 with AAP as binder. It was also observed that briquettes of higher densities were obtained at higher die pressure for all the binders [BONCIU et al, 2018;BONEA et al, 2018;GROZEA et al, 2017, STOLERU et al, 2016 .…”

“…Physical characterization of rice husk. Particle size distribution, bulk density, and particle density analysis were carried out using ASAE standards and gas pycnometry respectively [ASABE BONCIU et al, 2018;BONEA et al, 2018;GROZEA et al, 2017, STOLERU et al, 2016 .…”

“…Protein content was found to be 3.49 %. FTIR spectrum (figure 4) showed a low broad peak at the region between 3600 cm -1 and 3000 cm -1 indicating the content of carbohydrates and OH vibration [SAMFIRA et al, 2014;BUTU et al, 2014a, STOLERU et al, 2016 . The most significant peaks were at 2920 cm -1 and 2851 cm -1 which were signatures of asymmetric and symmetric stretching vibrations of CH in methylene.…”