• sediment
  • First, water travels through a 20" sediment cartridge that removes sediment, silt, sand and dirt. (filterwater.com)
  • In this study, water quality constituents and bacterial communities in sediment were analyzed in two stormwater retention ponds, RSP1 (reference pond) and RSP2 (problematic pond) over a period of two years, to identify the factors driving H 2 S production and understand the microbial community associated with H 2 S production in stormwater ponds. (rsc.org)
  • poisonous
  • Sedimentological investigations of these organic-rich sediments, which have continued to this day, typically reveal the presence of fine laminations undisturbed by bottom-dwelling fauna, indicating anoxic conditions on the sea floor, believed to be coincident with a low lying poisonous layer of hydrogen sulfide. (wikipedia.org)
  • occurs
  • It also occurs in volcanic gases, natural gas and some well waters. (pikecountycourier.com)
  • H 2S also occurs in volcanic gases, natural gas, and in some sources of well water. (wikipedia.org)
  • This is a fortuitous process that occurs because, during periods of thermal stratification, the waters of Bull Run enter the reservoir at lower temperatures than the surface waters causing the high nitrate water to sink to the oxygen-deficient lower reservoir depths. (wikipedia.org)
  • When water stagnate in late summer hydrogen sulfide and oxygen shortage occurs in lake sediments. (wikipedia.org)
  • reaction
  • We carry out Born-Oppenheimer molecular dynamic simulations to show that the reaction between the smallest Criegee intermediate, CH 2 OO, and hydrogen sulfide (H 2 S) at the air/water interface can be observed within few picoseconds. (rsc.org)
  • The concerted reaction proceeds with or without the involvement of one or two nearby water molecules. (rsc.org)
  • This reaction is exploited in the Claus process, an important industrial method to dispose of hydrogen sulfide. (wikipedia.org)
  • converts
  • Lead(II) acetate paper was once used to detect hydrogen sulfide because it readily converts to lead(II) sulfide, which is black. (wikipedia.org)
  • Upon combining with alkali metal bases, hydrogen sulfide converts to alkali hydrosulfides such as sodium hydrosulfide and sodium sulfide: H2S + NaOH → NaSH + H2O NaSH + NaOH → Na2S + H2O These compounds are used in the paper making. (wikipedia.org)
  • concentrations
  • Water sprays express eligible performance for H 2 S release control even though their dilution capacity was weakened at high gaseous concentrations and rates of releases. (hindawi.com)
  • High concentrations of hydrogen sulfide gas in the air can cause headaches and make people pass out… pretty much like any other gas. (watertestingblog.com)
  • soluble
  • When exposed to air, it slowly oxidizes to form elemental sulfur, which is not soluble in water. (wikipedia.org)
  • In addition, most cyanobacteria use phycobiliproteins, water-soluble pigments which occur in the cytoplasm of the chloroplast, to capture light energy and pass it on to the chlorophylls. (wikipedia.org)
  • chemistry
  • The British English spelling of this compound is hydrogen sulphide, but this spelling is not recommended by the International Union of Pure and Applied Chemistry (IUPAC) or the Royal Society of Chemistry. (wikipedia.org)
  • For well over a century, hydrogen sulfide was important in analytical chemistry, in the qualitative inorganic analysis of metal ions. (wikipedia.org)
  • Their chemistry is related to that of enamines and their tautomers when the α hydrogen is next to the C=N bond. (wikipedia.org)
  • In the past, the water chemistry of the lake has been compared to Clorox. (wikipedia.org)
  • bacteria
  • Bacteria Test Kit -- tests drinking water for the EPA limit of 1 cfu per 100mL. (watertestingblog.com)
  • Sulfur-reducing bacteria live in oxygen-deficient environments such as deep wells, plumbing systems, water softeners, and water heaters. (blogspot.com)
  • Furthermore, detailed organic geochemical studies have recently revealed the presence of molecules (so-called biomarkers) that derive from both purple sulfur bacteria and green sulfur bacteria: organisms that required both light and free hydrogen sulfide (H2S), illustrating that anoxic conditions extended high into the illuminated upper water column. (wikipedia.org)
  • In the deep water, hydrothermal vents may occur where chemosynthetic sulfur bacteria form the base of the food web. (wikipedia.org)
  • escapes
  • The air pollution produced by biogas is similar to that of natural gas, but with an additional risk from the toxicity of its hydrogen sulfide fraction and any unburned methane that escapes is a potent and long lived greenhouse gas. (wikipedia.org)
  • typically
  • In houses with hydrogen sulfide problems kitchen and bathroom fixtures will typically develop yellow or black stains and beverages such as coffee and tea will have odd discoloration. (watertestingblog.com)
  • Two important subclasses of lakes are ponds, which typically are small lakes that intergrade with wetlands, and water reservoirs. (wikipedia.org)
  • sodium
  • The chemical properties of MgS resemble those of related ionic sulfides such as those of sodium, barium, or calcium. (wikipedia.org)
  • Wastewater
  • Therefore, it uses more water and more wastewater disposal space (an important issue for homeowners with septic tanks). (purewaterproducts.com)
  • In 1968 - 1969 a study conducted by Metcalf and Eddy, under the auspices of the State Water Control Board, determined that water quality deterioration in the reservoir was caused by substandard wastewater discharges from 11 secondary wastewater treatment plants and non-point sources of pollution. (wikipedia.org)
  • readily
  • Imidoyl chlorides react readily with water, which makes any attempt to isolate and store them for long periods of time difficult. (wikipedia.org)
  • temperatures
  • If hydrogen sulfide is pressurized at higher temperatures, then cooled, the critical temperature reaches 203 K (−70 °C), the highest accepted superconducting critical temperature as of 2015. (wikipedia.org)
  • removal
  • Carbonization temperature, biogas flow rate, mass of the adsorbent and activating agent (KOH/water hyacinth (WH)) ratio were found to greatly influence the efficiency of the H2S and NH3 removal. (ac.ke)
  • greatly
  • Following the commissioning of UOSA, the water quality of the Occoquan Reservoir has greatly improved. (wikipedia.org)
  • capacity
  • A typical spray tower was modified to simulate the confined space for people's enterable routine operation (e.g., pump room), in which the dilution capacity of water sprays can also be evaluated. (hindawi.com)
  • Compared with Na 2 CO 3 , adjusting water flow rate may be an effective strategy in enhancing dilution capacity of water sprays due to the fact that larger flow rate led to both less dilution time ( T D ) and dilution concentration ( C D ). Furthermore, multinozzle configuration is more efficient than single-nozzle configuration under the same water consumption. (hindawi.com)
  • high
  • High volume chloraminated water discharge is toxic to fish, amphibians, and water-based reptiles. (freedrinkingwater.com)
  • Levels encountered in private wells are usually less than 10 ppm, because high levels of gas will not remain in solution in the water. (blogspot.com)
  • Since that time, water quality in the Occoquan Reservoir has steadily improved and the reliable, high-quality effluent produced by UOSA has increased the safe yield of the Reservoir. (wikipedia.org)