Innovative isotopic method to evaluate bioaccumulation of As and MTEs in Vitis vinifera

Khaska, Somar; Salle, Corinne Le Gal La; Sassine, Lara; Bruguier, Olivier; Roig, Benoît

doi:10.1016/j.scitotenv.2018.09.222

Cited by 5 publications

(3 citation statements)

References 56 publications

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“…The aim of environmental risk assessment is to identify the likelihood of adverse changes in the natural environment or long-term effects of these changes stemming from the negative impact of a substance/element on the environment (Kicińska & Mamak, 2017 ; Kicińska, 2019a ; Yankovich et al, 2010 ). This notion is close to that of ecological risk assessment, which is a similar process determining the likelihood of adverse environmental effects that can or do occur as a result of exposure to one or more stressors (Khaska et al, 2019 ; Tsukada et al, 2023 ). In the present study, such a stressor was Sr. Its presence should be considered in the context of not only total concentration (potentially available) but also co-occurring biogeochemical fractions of this element (e.g.…”

Section: Resultsmentioning

confidence: 75%

Strontium leaching from municipal waste subjected to incineration

Alicja,

Grzegorz

2024

Environ Geochem Health

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The aim of the study was to determine the content and leachability of Sr in ashes obtained through combusting municipal waste in household furnaces. The waste had been collected as a mixed stream and as separate fractions (i.e. furniture, sponges, waste paper, PCV packaging, plastic-coated paper cartons, imitation leather, rubber, textiles and polystyrene). Using single-step chemical extractions, (HCl + HNO3, H2O, 0.01 M CaCl2, 0.1 M CH3COOH), we determined the total content of Sr (TC) and proportions of the following fractions: water-leachable, phytoavailable and easily soluble and bound to carbonates. We also analyzed the effect of reducing pH in the extraction solutions on St leachability from the study material. The study showed that Sr concentration in ash generated from the combustion of conventional fuels, alternative fuels and municipal waste ranged from 114 to 1006 mg/kg. The largest amounts of Sr were found in ash generated from the combustion of alternative fuels (coal pellets 488–1006 mg/kg), conventional fuels (hard coal 430–670 mg/kg) and mixed waste (237–825 mg/kg). The most mobile fraction of Sr (water-leachable) comprised from 1.3% to nearly 91% TC; the phytoavailable fraction and the ion-exchange and carbonate-bound fraction comprised 3–92% TC and 9–72% TC, respectively. We also found that the greatest pH reductions do not always entail the greatest amounts of extracted Sr. A much more significant factor in this respect is the mineral and chemical composition of primary materials, which can buffer changes in pH. The Risk Assessment Code (RAC) values pointed to a varied environmental risk and the highest RAC values (> 70) were found for coal pellets, wood pellets, straw, rubber and plastic containers for mixed oils.

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Section: Resultsmentioning

confidence: 75%

Strontium leaching from municipal waste subjected to incineration

Alicja,

Grzegorz

2024

Environ Geochem Health

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“…Densitas (105; 135; 136) atau kerapatan merupakan massa per unit volume suatu zat (211)(212)(213) pada suhu (137; 138) tertentu dan tidak hanya ditentukan gaya interaksi antar molekul (231)(232)(233)(234)(235) . Senyawa asam borat memiliki kelarutan yang sedikit jika dilrutkan di dalam alkohol, (139)(140)(141)(142) cukup larut dalam piridina (143) dan akan sangat sedikit larut (144) ketika pelarutnya aseton.…”

Section: Analisis Gapunclassified

“…Fraksi dari arus total (232)(233)(234)(235)(236) yang dibawa oleh ion jenis tertentu. Untuk larutan dengan dua jenis ion, bilangan transport kation :…”

Section: Besaran Kimia Fisika 3 1 Bilangan Transportunclassified

Boric Acid (H3(BO3): Recognize The Molecular Interactions in Solutions

Dwynda¹,

Zainul²

2018

Preprint

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Asam borat biasa dikenal dengan asam boraks merupakan suatu monobasa dari asam Lewis boron lemah yang dapat digunakan sebagai antiseptik, insektisida, penyangga pH, atau penyerap neutron. Asam borat larut dalam air mendidih. Ketika senyawa ini dipanaskan pada suhu melebihi 170OC senyawa ini akan terdehidrasi kemudian membentuk HBO2 atau asam metaborat . Senyawa dengan rumus kimia H3BO3 ini terdapat dalam bentuk serbuk putih yang larut dalam air dan kristal yang tidak berwarna. Penilitian ini bertujuan untuk mengetahui struktur, karakteristik, bentuk molekul dan jenis ikatan dari asam borat. Untuk metode literasi jurnal digunakan aplikasi EndNote yang dijelaskan melalui fishbone state of art. Sedangkan metode yang digunakan untuk melihat hasil optimasi, energi serta gambar dari molekul digunakan metode komputasi dengan software ChemOffice 15.0. Berdasarkan metode ini diperoleh energi kinetik rotasi senyawa 0.3165, dipole/dipole 1.2329 dan energi total 5.1769 kcal/mol. Untuk konduktivitas, kecepatan hanyut, gerakan ion, dilakukan dengan menggunakan metode perhitungan dengan rumusan hasilnya dan beberapa soal yang dibuatkan grafiknya. Secara termodinamika, asam borat pada keadaan standar dan tekanan 1 atm memiliki ∆HoR -5351 kJ / kmol, ∆G°f -122.462 kJ / kmol dengan konstanta kecepatan reaksi k= 8,8727 L/kmol.s. dan Cp pada suhu 100oC sebesar 35,93 J/kgK serta Ho -16.636 J/mol. Proses pembuatan asam borat berlangsung secara spontan dapat dilihat melalui ∆G°f yang bernilai negatif dan terjadi reaksi eksoterm dapat dilihat berdasarkan perolehan ∆HoR yang negatif.

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