background: hydrogen sulfide (h2s) suicides have been frequent in japan in recent years. this study was performed to describe the epidemiologic profile of an outbreak of h2s suicides in japan. methods: in september 2008, questionnaires about patients involved in h2s suicides were sent to 250 hospitals in japan. data collected from each patient included gender, age, clinical manifestations, date...

The chlorinated fumigants chloropicrin (trichloronitromethane) and 1,3-dichloropropene (1,3-D) are extensively used in agricultural production for the control of soilborne pests. The reaction of these two fumigants with hydrogen sulfide species (H2S and HS-) was examined in well-defined anoxic aqueous solutions. Chloropicrin underwent an extremely rapid redox reaction in the hydrogen sulfide so...

The use of electrotechnical equipment refers to reagent-free methods and makes it possible simplify the automation schemes for facilities removing pollutants from aqueous solutions. article substantiates approaches structural diagrams a water purification unit based on electrolysis processes. During research, processes oxidation were analyzed when block electrochemical action solutions was used...

Sulfide oxidation is a common phenomenon associated with many mined ore bodies and extracted or processed waste. Where the products of these chemical reactions can enter a water body the result is often a reduction in water quality through the increase of acidity, metals and dissolved salts. Due to an attributed lower environmental impact the release of sulfate has received little attention in ...

Flow injection analysis (FIA) and flow analysis (FA) were used to automate the calorimetric determination of hydrogen sulfide by the methylene blue method. A low-sensitivity FIA manifold for concentrations up to 200 PM H,S had a detection limit of 1.2 FM. A highsensitivity FIA manifold for concentrations up to 75 PM H,S had a detection limit of 0.12 PM. The C.V. was < 1% at concentrations > 10 ...

Abstract The sluggish kinetics of oxygen evolution reaction (OER) severely limits the efficiency electrocatalytic water splitting to produce hydrogen. Therefore, an effective strategy is proposed replace OER with selective methanol oxidation (MOR). A nickel sulfide nanosheet catalyst supported on Ni foam (NiS/NF) was prepared by a facile hydrothermal method following sulfurization treatment. as...

Abstract The biological removal of hydrogen sulfide in biogas is an increasingly adopted alternative to conventional physicochemical processes because its economic and environmental benefits. In this study, a real-scale biotrickling filtration (BTF) process packed with polypropylene carrier was used investigate the high concentrations H2S from anaerobic digester. results show that entirely remo...

A 20-month pilot-scale study was conducted to examine the impact of temperature on the performance of an anaerobic biological contractor used to treat perchlorate-contaminated water. The contractor was successfully acclimated with indigenous microorganisms. Influent temperatures varied from 1.4 to 30 degrees C. The objectives of the study were to investigate the effects of temperature on perchl...

Hydrogen sulfide (H2S) removal from various industrial gases is crucial because it can cause huge damage to humans, the environment, and production. Zeolite possesses specific surface area well-developed pore structure, making a promising adsorbent for H2S removal. This review attempts comprehensively compile current studies in literature on gas purification processes using zeolites, including ...