Search results with tag "Sulfide"
Jan 24, 2003 · hydrogen sulfide but also a wide range of components and properties. Published test methods provide a way to standardize test procedures so that the results from one location are comparable to the results from another location. Some of the available test methods for measuring and detecting hydrogen sulfide are listed in Tables 2-4.
Positive interference on available Cyanide test Degrades Cyanide in samples for all methods during storage Test sample with buffered lead acetate paper Only shows positive for sulfide over 50 mg/l Available CN method (ASTM D-6888) eliminates sulfide interference up to 50 mg/l when using alternate acid reagent. Sulfide Reducing Acid Reagent
Hydrogen sulfide exists, in aqueous solution, in equilibrium with its ions. Solubilities which have been compiled correspond to bulk solubilities. For this purpose the number of moles of hydrogen sulfide in solution has been taken to be the sum of the number of moles of the uncharged H2S plus those of HS- and those of S--.
HYDROGEN SULFIDE H2S Note 1 CARBONYL SULFIDE COS Note 1 SULFUR IN MERCAPTANS SRSH Note 1. IRON SULFIDE FeS lbs OTHER SULFUR COMPOUNDS ? Note 1 MERCURY Hg ppb PARTICULATES ? microns NOTES (1) Sulfur measurements given in grains/100scf or in ppm or both. K:\EMTCNT\X = NAT GAS QUALITY & MEASUREMENT\BPS …
Florida Water Resources Journal • October 2013 41 6.3, acid treatment is required to lower the pH and increase the total sulfide partition of H 2S prior to aeration.
Lithium iron disulfide batteries contain no sulfides or cyanides and they do not meet any other reactivity criteria including “reacts violently with water” and therefore do not meet any of the criteria established in 40 CFR 261.2 for reactivity.
Group III (Al3+, Cr3+, Fe3+, Zn2+, Ni2+, Co2+, Mn2+) cations produce slightly soluble sulfides (K sp values more than 10 -20 ) so they can be precipitated by relatively high amounts of sulfide ion; this can be achieved by adding a basic solution of H 2 S.
sulfides (disulfides) acidic basic HO opsin Lys-NH2 HN H Lys- opsin + rhodpsin Carbon-nitrogen multiple bonds N imine (Schiff base) CCN nitrile (cyano group) basic CH O CC O Carbonyl-oxygen double bonds (carbonyls) aldehyde ketones CO O H CO O C carboxylic acid ester CCl O acid chloride CO O C O anhydrides CN O amide
f) Evaluate drops across pipe inverts larger than 0.1 foot for hydrogen sulfide generation, see Part Two, Section 28 (Hydrogen Sulfide (H2S) Control) and Part Two, Section 16 (Manhole Drop Connections). c. Radius of the Channel. 1) For sewer pipelines smaller than 12-inch diameter, provide a minimum radius of the centerline of
Acetaldehyde, diethyl ether, hydrogen sulfide, acetone, carbon disulfide, hexane Acetylene, ammonia, hydrogen, propane, propylene and methane (GHS: H220-H226, H281) NFPA rating of 4 Flash point below 73 F (22.8 C) and boiling point below 100 F. Flammable gases
Therefore it is more useful in the case of sulfides to define a differ-ent solubility product K spa based on the reaction +M m S n (s) + 2H +mM + nH 2 S (aq) Values of K spa, taken from Reference 8, are given for several sulfides in the auxiliary table following the main table. Additional discus-
Hydrogen sulfide, when combined with water vapor, forms a weak acid that may damage biogas piping or equipment. Passing biogas through wood chips impregnated with iron sponge, biological scrubbers, or activated carbon help remove hydrogen sulfide from biogas. Liquid phase oxidation is an alternative removal method.
Hydrogen sulfide, a highly toxic gas, may be present. Signs and symptoms of overexposure to hydrogen sulfide include respiratory and eye irritation, dizziness, nausea, coughing, a sensation of dryness and pain in the nose, and loss of consciousness. Odor does not provide a reliable indicator of the presence of hazardous levels in the atmosphere.
SAN 0469 Bitumen Material Safety Data Sheet Syncrude Canada Ltd. Page 2 of 7 SKIN: Hot bitumen and bitumen fumes may cause moderate to severe irritation and burns. Cold ... Confined spaces may accumulate hydrogen sulfide gas. Hydrogen sulfide may cause respiratory tract irritation, nausea, headache, dizziness, pulmonary edema, loss of ...
Hydrogen sulfide: Human health aspects 1 FOREWORD Concise International Chemical Assessment Documents (CICADs) are the latest in a family of publications from the International Programme on
Weak Acid Dissociable (WAD) Cyanide: ... forming volatile carbonyl sulfide, which is converted to sulfide upon absorption in an alkaline liquid. For manual total cyanide distillation analysis use the BC MOE HCl-HH method (Ref. 13) to mitigate thiocyanate interference. To mitigate thiocyanate interference on flow systems (CFA or FIA), the
INTERFERENCES: Hydrogen sulfide gives a negative interference. HCl gives a positive interference up to a maximum of 15 µg per sample. HBr gives a positive interference as it is sampled continuously . ... APPENDIX A: CLEANING PROCEDURE FOR …
1 Purpose/Scope: The purpose of this program is to establish minimum requirements for site specific H 2 S safety, which will enhance safety in the occupational setting where hydrogen sulfide is
Entry Procedure Checklist: Complete the following steps before, during, and after a confined space entry: Step 1 ... Explosive Gases, Carbon Monoxide, and Hydrogen Sulfide readings and communicate them to the attendant to place on the Permit Form. Step 9 The attendant should maintain constant communication with the entrant until the entrant has ...
metallic impurities that are colored by sulfide ion, under thenium hydroxide to a pH between 3.0 and 4.0, dilute with specified test conditions, does not exceed the Heavy metals water to 40 mL, and mix. limit specified in the individual monograph in percentage Procedure—To each of the three tubes containing the
applications, including sulfide and chloride stress-cracking environments common to the oil and gas production industries. To discuss available constructions, contact your Emerson sales office and ... references are to NACE MR0175-2002. Optional materials are available to meet NACE MR0103 and NACE MR0175 / ISO 15156. Material requirements
acetone, unless you are following a respectable procedure and use a blast shield and proper precautions. Never store mixtures of concentrated acids, particularly nitric acid, and organic or inorganic waste components; ... Hydrogen Sulfide fuming nitric acid, oxidizing gases Hypochlorites acids, activated carbons Iodine acetylene, ammonia, hydrogen
upon contact, such as sodium cyanide, iron sulfide, calcium carbide 8.1.4 Segregate acids from bases. 8.2 Bases 8.2.1 Segregate bases from acids, metals, explosives, organic peroxides and easily ignitable materials. 8.3 Solvents (Flammable and Halogenated Solvents) 8.3.1 Store in approved safety cans or cabinets.
Hazardous properties of H 2S gas Hydrogen sulfide is heavier than air and may travel along the ground. It collects in low-lying and enclosed, poorly-ventilated areas such as basements, manholes, sewer lines, under-ground telephone vaults and manure pits. For work within confined spaces, use appro-priate procedures for identifying hazards,
Comparison of Field Olfactometers in a Controlled Chamber using Hydrogen Sulfide as the Test Odorant M.A. McGinley*, C.M. McGinley* * St. Croix Sensory, Inc., P.O ...
Hydrogen Sulfide Section 8. Exposure controls/personal protection TWA: 10 ppm 8 hours. OSHA PEL Z2 (United States, 2/2013). AMP: 50 ppm 10 minutes.
sample draw gas monitor is capable of detecting the presence of combustible gas, oxygen (O2), carbon monoxide (CO), hydrogen sulfide (H2S), and various other toxic gases simultaneously. The GX-6000’s rugged, reliable, and easy-to-use design makes it ideally suited for a wide range of applications, including sewage treatment plants, utility
Franklin and others (1981), Ohmoto and Skinner (1983), Fox (1984), Lydon (1984, 1988), Franklin (1993), and Slack (1993). GEOLOGIC FACTORS THAT INFLUENCE POTENTIAL ENVIRONMENTAL EFFECTS Deposit size Historically, most economic deposits are in the 1-5 million tonnes range (Singer, 1986c,d; Singer and Mosier, 1986).
standard "Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments" was published in mid-April 2003. Following is an overview of the document, including discussion of pertinent differences among MR0175-2002, MR0175-2003, and MR0103. NACE CORROSION/2004 Paper 04649 Page 2 www.nace.org
of applications, including sulfide and chloride stress-cracking environments common to the oil and gas production industries. To discuss available constructions, contact your Emerson sales office and ... references are to NACE MR0175-2002. Optional materials are available to meet NACE MR0103 and NACE MR0175 / ISO15156. Material requirements
Sulfuric Acid: Sulfur trioxide, carbon monoxide, sulfuric acid mist, sulfur dioxide, and hydrogen sulfide. Lead Compounds: High temperatures likely to produce toxic metal fume, vapor, or dust; contact with strong acid or base or presence of nascent hydrogen may generate highly toxic arsine gas. Hazardous Polymerization: Will not occur XI.
This part of NACE MR0175/ISO 15156 addresses all mechanisms of cracking that can be caused by H 2S, including sulfide stress cracking, stress corrosion cracking, hydrogen-induced cracking and stepwise cracking, stress-oriented hydrogen-induced cracking, soft zone cracking and galvanically induced hydrogen stress cracking.
requires that metallic components of oil field equipment exposed to sour environments be sulfide stress cracking (SSC) resistant. Prevention of SSC is assured by proper selection of materials of controlled composition and hardness. Available on Series 51/52 and AF 51/52. API 607 Edition 4is a fire test for soft seated valves, developed by the ...
S2- sulfide ion SO 4 2- sulfate ion SO 3 2-sulfite ion CO 3 2- carbonate ion Cr 2O 7 2-dichromate ion HPO 4 2- hydrogen phosphate - PO 4 3-phosphate ion Other Compounds Formula Name H 2O water NH ammonia CH methane (natural gas) O 3 ozone H 2 2 hydrogen peroxide 2 2, O 2, F 2, Cl 2, Br 2, I 2 diatomic molecules He, Ne, Ar Noble gases . Acids ...
HF = hydrogen fluoride . HGB = Houston-Galveston-Brazoria . H. 2S = hydrogen sulfide . H 2SO 4 = sulfuric acid . µg/m. 3 = microgram per cubic meter . NAICS = North American Industry Classification System . NO. 2 = nitrogen dioxide . NO x = oxides of nitrogen. Criteria pollutant and PM 2.5 precursor evaluated as NO 2 and ozone precursor ...
Volatile Organic Compounds (VOC) Any chemical substance which contains compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, determined to have photochemical reactivity. ... Carbonyl sulfide 463581 Catechol 120809 Chloramben 133904 Chlordane 57749 ...
dioxide) and oxidizes dissolved metals such as iron, hydrogen sulfide, and volatile organic chemicals (VOCs). Aeration is often the first major process at the treatment plant. During aeration, constituents are removed or modified bee with the treatment fore they can interfer processes.
sulfur compounds in the process flue gas. Combustion efficiencies of 99.6 percent for hydrogen sulfide and 99.8 percent for CO have been measured for a flare on a carbon black plant. Particulate emissions may also be reduced by combustion of some of the carbon black particles, but emissions of sulfur dioxide and nitrogen oxides are thereby ...
sulfides. Pressure surges are abrupt increases in operating pressure in force mains which typically occur during pump start-up and shut-off. Pressure surges may have negative effects on force main integrity but can be reduced by proper pump station and …
Hydrogen sulfide levels...15 Special conditions for drilling and blasting underground...15 2. Special requirements for using cranes ... Control of access and egress In addition to establishing a check-in/check-out procedure, the employer must ensure safe access to …
Hydrogen sulfide Mercaptanes BTX Water weak strong Pressure swing adsorption plant in Leuna, Germany 4 The process. ... valve skid(s) with interconnecting piping, control valves and instrumentation and a control system for control of the unit. The pressure swing adsorption process has four basic process steps: – Adsorption ...
Hydrogen sulfide toxicity is highly pH dependent, due to the H2S form being the toxic agent and not HS-. The pKa for H2S is 7.0, indicating higher toxicity at a pH of 7 or less when H2S is ... Control of denitrification is either by control of nitrification (reduced sludge age or reduced
wine production, measurement is critical, knowing what to measure and when, and ... formation of hydrogen sulfide. After fermentation is complete, the coarse sediment is removed by racking or centrifugation. However, colloidal suspensions may also need to be removed or they will
c) Hydrogen Sulfide. Contain no more than 20 ppm, by volume, of H 2 S. d) Total Sulfur. Contain no more than 35 ppm, by weight, e) Temperature. Shall not exceed 120oF. f) Nitrogen. Contain no more than 4 mole percent. g) Hydrocarbons. Contain no more than 5% mole percent and Dew point no more than -20oF. h) Oxygen. Contain no more than 10 ppm ...
Hydrogen Sulfide Iron Manganese pH Sodium Sulfate Total Dissolved Solids Zinc Unobjectionable Unobjectionable 5 TCU 5 NTU 0.2 250 1 300 (as CaCo3) * 0.05 1 0.5 6.5 - 8.5 200 * 250 500 5 * Table 3.5 Standard Values for Disinfectants and Disinfectant By - Products Constituents Maximum Level (mg/L) a. Disinfectant Chlorine (residual) b ...
Sulfides 100-200 >200 Source: WEF and ASCE (1992), reprinted from Parkin, G.F. and Owen, W.F. (1986). Produce undesirable odors unless provisions are made to oxidize the escaping gases. Gas production must be minimized (sulfate concentration must be reduced to less than
austenitic SST, duplex SST, nickel and cobalt base alloys. Carbon Steel Carbon and low-alloy steels have acceptable resistance to SSC and SCC however; their application is often limited by their low resistance to general corrosion. The processing of carbon and low alloy steels must be carefully controlled for good resistance to SSC and SCC. The
Hydrogen Sulfide, Detecting hydrogen sulfide, Sulfide, Hydrogen Sulfide in Aqueous Solvents, Aqueous solution, Solution, Sheet, Sulfides, Organic Compounds: Alkanes and Cycloalkanes, WSSC Water, Control, Hazard Control & PPE Selection Guide, Hydrogen, Solubility product, Anaerobic Digestion Fundamentals, Acid, Valero Energy, Volatile, Procedure, SAFETY MANUAL, CONFINED SPACE ENTRY PERMIT, Stress, Cracking, NACE MR0175, 2002, NACE, Incompatibilities of concentrated nitric acid, Solvents, Properties, Manure, Olfactometers in a Controlled Chamber, Olfactometers in a Controlled Chamber using Hydrogen Sulfide, SAFETY DATA SHEET, Airgas, GX-6000 Operator's Manual, Detecting, VOLCANIC-ASSOCIATED MASSIVE SULFIDE DEPOSITS, Skinner, Sulfide stress cracking, MR0175, Stress cracking, Series 51/52 Flanged Ball Valves, 102 DEFINITIONS Volatile Organic Compounds VOC, Carbon black, Force main, Measurement, CO2 Pipelines, Sodium, Sulfide Stress Cracking --NACE MR0175-2002,, Duplex, Steels