Quantification of dissolved organic matter in pore water of the vadose zone using a new ex-situ positive displacement extraction

Sopliniak, Alexander; Elkayam, Roy; Lev, Ovadia

doi:10.1016/j.chemgeo.2017.06.017

Cited by 4 publications

(4 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the JMPR report on ethiprole, ethiprole sulfone residue in brown rice and rice husks was from the metabolism of ethiprole in rice and transportation from soils, while ethiprole amide was mainly from uptake and translocation from roots 9 . The uptake and translocation of compounds by plants are affected by their physiochemical properties and soil characteristics 41,42 . Compounds (log K ow < 3) are readily taken by rice roots but finitely translocated into rice leaves 41 .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Dissipation, residue distribution, and risk assessment of ethiprole and its metabolites in rice under various open field conditions

Dong

2023

J Sci Food Agric

View full text Add to dashboard Cite

BACKGROUNDEthiprole has been registered to control planthoppers in rice fields for many years in Asia. However, its dissipation and residues in rice under natural field conditions and health hazards are largely unclear. In the present study, a modified QuEChERS (i.e. Quick Easy Cheap Effective Rugged Safe) and high‐performance liquid chromatography‐tandem mass spectrometry method was established to detect ethiprole and its metabolites, ethiprole amide and ethiprole sulfone, in brown rice, rice husks, and rice straw. The field experiments were implemented in 12 representative provinces of China under Good Agricultural Practices aiming to investigate the fate and terminal residues of ethiprole and its metabolites in rice. Finally, the dietary risk of ethiprole was evaluated.RESULTSThe average recoveries of these analytes in all matrices were 86.4–99.0% with a repeatability of 0.575–9.38%. The limits of quantification for each compound were 0.01 mg kg−1. Dissipation of ethiprole followed the single first‐order, first + first‐order, and first‐order multi‐compartment kinetic models with a half‐life of 2.68–8.99 days in rice husks. The dissipation half‐life of ethiprole combining all metabolites was 5.20–16.2 days in rice husks. The terminal residues of ethiprole and its metabolites at preharvest intervals of 21 days were < 0.011, 0.25, and 0.20 mg kg−1 in brown rice, rice husks, and rice straw, respectively. Ethiprole amide was undetectable in all matrices, and the risk quotient of ethiprole was far less than 100%.CONCLUSIONEthiprole rapidly converted to ethiprole sulfone in rice, and ethiprole and ethiprole sulfone mainly remained in rice husks and straws. The dietary risk of ethiprole was acceptable for Chinese consumers. © 2023 Society of Chemical Industry.

show abstract

Section: Resultsmentioning

confidence: 99%

“…9 The uptake and translocation of compounds by plants are affected by their physiochemical properties and soil characteristics. 41,42 Compounds (log K ow < 3) are readily taken by rice roots but finitely translocated into rice leaves. 41 The ethiprole and its metabolites have log K ow < 3.…”

Section: Dissipation Of Ethiprole and Its Metabolites In Rice Husks A...mentioning

confidence: 99%

Dissipation, residue distribution, and risk assessment of ethiprole and its metabolites in rice under various open field conditions

Dong

2023

J Sci Food Agric

View full text Add to dashboard Cite

show abstract

“…The evaluation and the nature of the compacted layer could be related to different factors such as leaching and accumulation of organic and inorganic colloidal material in the soil pores, compaction processes under the recharged water weight, soil erosion processes, and the routine operations in the ponds [18]. In fact, the results from the soil profile measurements and from other research studies in the Shafdan (e.g., [4,7,21]) indicate that each of these factors can be relevant, or even dominant, in different areas of the recharge ponds. Regardless of these factors, it can be assumed that the development of this layer was enhanced with the utilization of improper tillage tools (e.g., narrow plow) and due to the improper tillage regime (e.g., working over too wet soil).…”

Section: Soil Compactionmentioning

confidence: 99%

“…The recharge and the SAT process take place in the coastal Quaternary sandstone aquifer, which also provides vast storage capacity that cannot be replaced by surface reservoirs. During the flow process of secondary effluent through the vadose zone and the aquifer, most of the biodegradable organic matter, suspended solids, bacteria, viruses, phosphorus, heavy metals, and other elements are removed from the effluents by a combination of geochemical, physical, and biological processes [1][2][3][4][5][6][7][8][9][10][11][12][13]. The recovered effluents, after SAT treatment, are characterized by excellent quality for most of the measured parameters, which comply with the levels allowed by the Israeli Health Ministry for unrestricted irrigation of any crop [1,10,11].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Soil Tillage Equipment on the Recharge Capacity of Infiltration Ponds

Negev

Shechter

Shtrasler

et al. 2020

Water

View full text Add to dashboard Cite

The Dan Region Reclamation Project (Shafdan) reclaims ~125 millions of cubic meters per year (Mm3/year) of treated wastewater from the Tel Aviv Metropolitan area. Following secondary treatment, the effluent is recharged into a sandy aquifer for soil aquifer treatment (SAT). Over the past three years, a decrease in recharge capacity was noticed. Several operational causes were considered including reservations regarding the tillage procedure of recharge ponds. Tillage of the recharge ponds facilitates aeration, breaking surface crusts and the removal of vegetation. The procedure includes deep (40–60 cm) plowing and shallow (10–20 cm) sweep-knives (SK) cultivator or discus. In this research, the existing tillage equipment was compared to a new equipment, which includes a deep subsoiler and a chisel-knives (CK) cultivator. The effects of each tool on the infiltration rate (IR), recharge capacity, and soil compaction were examined. The results suggest a significant improvement in the recharge capacity, up to 95% and 15% on average following subsoiler and CK cultivator treatments, respectively, with respect to the existing plowing treatment. In addition, the depth of the compacted soil layer increased from ~30 to ~55 cm after subsoiler treatment. It seems that this shallow layer, developed under an improper tillage regime, played a major role in the reduction of the recharge capacity. Essential understanding of other operational factors such as drying periods, preparation of the field, and soil micro-topography was also achieved.

show abstract

Soil Aquifer Treatment System Performance: Israel’s Shafdan Reclamation System as an Ultimate Case Study

Elkayam

Lev

Negev

et al. 2020

Springer Hydrogeology

View full text Add to dashboard Cite

Quantification of dissolved organic matter in pore water of the vadose zone using a new ex-situ positive displacement extraction

Cited by 4 publications

References 56 publications

Dissipation, residue distribution, and risk assessment of ethiprole and its metabolites in rice under various open field conditions

Dissipation, residue distribution, and risk assessment of ethiprole and its metabolites in rice under various open field conditions

The Effect of Soil Tillage Equipment on the Recharge Capacity of Infiltration Ponds

Soil Aquifer Treatment System Performance: Israel’s Shafdan Reclamation System as an Ultimate Case Study

Contact Info

Product

Resources

About