دورية أكاديمية
أعرض في EDS

Electrochemical Generation of Hydroxide and Hydrogen Peroxide for Hydrolysis of Sulfuryl Fluoride Fumigant.

التفاصيل البيبلوغرافية
العنوان: Electrochemical Generation of Hydroxide and Hydrogen Peroxide for Hydrolysis of Sulfuryl Fluoride Fumigant.
المؤلفون: Weng C; Department of Civil and Environmental Engineering, Stanford University, 473 Via Ortega, Stanford, California 94305, United States., Napier C; Department of Civil and Environmental Engineering, Stanford University, 473 Via Ortega, Stanford, California 94305, United States., Katte C; Department of Civil and Environmental Engineering, Stanford University, 473 Via Ortega, Stanford, California 94305, United States., Walse SS; Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, USDA, 9611 South Riverbend Avenue, Parlier, California 93648-9757, United States., Mitch WA; Department of Civil and Environmental Engineering, Stanford University, 473 Via Ortega, Stanford, California 94305, United States.
المصدر: Journal of agricultural and food chemistry [J Agric Food Chem] 2024 Jul 10; Vol. 72 (27), pp. 15133-15141. Date of Electronic Publication: 2024 Jun 30.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: American Chemical Society Country of Publication: United States NLM ID: 0374755 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5118 (Electronic) Linking ISSN: 00218561 NLM ISO Abbreviation: J Agric Food Chem Subsets: MEDLINE
أسماء مطبوعة: Original Publication: Washington, American Chemical Society.
مواضيع طبية MeSH: Hydrogen Peroxide*/chemistry , Fumigation* , Sulfinic Acids*/chemistry , Hydroxides*/chemistry, Hydrolysis ; Electrochemical Techniques/methods ; Pesticides/chemistry
مستخلص: The post-harvest fumigant, sulfuryl fluoride (SO 2 F 2 ), is a >1000-fold more potent greenhouse gas than carbon dioxide and methane. Pilot studies have shown that SO 2 F 2 fumes vented from fumigation chambers can be captured and hydrolyzed by hydroxide (OH - ) and hydrogen peroxide (H 2 O 2 ) at pH ∼ 12 in a scrubber, producing SO 4 2- and F - as waste salts. To reduce the costs and challenges associated with purchasing and mixing these reagents onsite, this study evaluates the electrochemical generation of OH - and H 2 O 2 within spent scrubbing solution, taking advantage of the waste SO 4 2- and F - as free sources of electrolyte. The study used a gas diffusion electrode constructed from carbon paper coated with carbon black as a catalyst selective for the reduction of O 2 to H 2 O 2 . Under galvanostatic conditions, the study evaluated the effect of electrochemical conditions, including applied cathodic current density and electrolyte strength. Within an electrolyte containing 200 mM SO 4 2- and 400 mM F - , comparable to the waste salts generated by a SO 2 F 2 scrubbing event, the system produced 250 mM H 2 O 2 at pH 12.6 within 4 h with a Faradaic efficiency of 98.8% for O 2 reduction to H 2 O 2 . In a scrubbing-water sample from lab-scale fumigation, the system generated ∼200 mM H 2 O 2 at pH 13.5 within 4 h with a Faradaic efficiency of 75.6%. A comparison of the costs to purchase NaOH and H 2 O 2 against the electricity costs for electrochemical treatment indicated that the electrochemical approach could be 38-71% lower, depending on the local cost of electricity.
فهرسة مساهمة: Keywords: agricultural fumigation; electrochemical reduction; hydrogen peroxide; hydroxide; sulfuryl fluoride
المشرفين على المادة: BBX060AN9V (Hydrogen Peroxide)
64B59K7U6Q (sulfuryl fluoride)
0 (Sulfinic Acids)
0 (Hydroxides)
9159UV381P (hydroxide ion)
0 (Pesticides)
تواريخ الأحداث: Date Created: 20240630 Date Completed: 20240710 Latest Revision: 20240710
رمز التحديث: 20240710
DOI: 10.1021/acs.jafc.4c00864
PMID: 38944760
قاعدة البيانات: MEDLINE
الوصف
تدمد:1520-5118
DOI:10.1021/acs.jafc.4c00864