Lead arsenate, acid

Chemical Designations - Synonyms Lead arsenate, acid Plumbous arsenate Chemical Formula PbHAS04. 

LEAD ARSENATE Lead arsenate, acid, Plumbous arsenate Poisonous Liquid Or Solid, Class B, II 2 0 0 ... 

Lead arsenate (acid) PbHAs04 Pfaltz and Bauer Inc., 1976 18.395 1.18026 2.46083... 

In the case of lead arsenate (acid form), calcium arsenate, and sodium arsenate, the Pb-isotopic compositions closely match those of sulfides from porphyry copper deposits from southeastern Arizona, specifically from the Pima and Silver Bell districts (Bouse et al., 1999). Notably, other major historical producers of arsenic trioxide (e.g., Anaconda Copper Co., US Smelting Co., Jardine Mining Co.) used... 

SYNS ACID LEAD ARSENATE ACID LEAD ORTHOARSENATE ARSENATE of LEAD ARSINET-TE DIBASIC LEAD ARSENATE GYPSINE LEAD ARSENATE LEAD ARSENATE, soUd (DOT) LEAD ARSENATE (standard) ORTHO LIO DUST ORTHO L40 DUST SCHULTENTTE SECURITY SOPRABEL STANDARD LEAD ARSENATE Q TALBOT... 

Lead Arsenate Lead Arsenate, Acid Plumbous Arsenate ... 

Monosodium methanearsonate (MSMA) [2163-80-6] CH AsONaOOH, disodium methanearsonate (DSMA) [144-21-8], CH2AsO(NaO)2, cacodyhc acid [75-60-5], (CH2)2AsOOH, and arsenic acid [7778-39-4], H AsO, are used ia agriculture appHcations (11,12). MSMA, DMSA, and cacodyUc acid are used as herbicides (qv) especially ia cotton (qv) fields for the control of Johnson and nutsedge grass and other weeds. Arsenic acid (13) and cacodyhc acid may be used as a desiccant for the defoHation of the cotton boU prior to harvesting. Calcium arsenate [7778-44-1], Ca2(As0 2> once an important chemical for the control of the boU weevil and cotton worm, has disappeared from appHcation and the use of lead arsenate [7784-40-9], Pb AsO, for fmit crops is currentiy restricted. 

Lead, arsenic, and antimony—determined in the solution obtained by boiling 10 g of the titanium dioxide for 15 min in 50 mL of 0.5 Nhydrochloric acid In addition to individual specifications, general specifications have been written for provisionally Hsted certifiable colors ... 

In addition to their concern regarding spray residues of the lead arsenate and organic types, canners whose fruits are sprayed with lime sulfur have reason for concern over the presence of sulfur in their canned products. The presence of elemental sulfur or simple compounds of reduced sulfur in canned foods, especially in those products having an acid character, is objectionable, not only because it may be the source of sulfide flavor and staining, but also because it may actively accelerate the formation of hydrogen by the corrosive action of the product on the container. 

Selocide is not compatible with acid lead arsenate (PbHAs04) under normal spray program conditions, but is compatible with cryolite (NasAIFe) (5). Selocide is compatible with DDT [2,2-bis(p-chlorophenyl)-l,l,l-trichloroethane] and has been used with DDT for the control of mites and Codling moth, Carpocapsa pomonella L., during the 1947 and 1948 growing seasons. 

DDT on Pears. Early experiments indicated that the conventional hydrochloric acid bath, as used for the removal of lead arsenate residues, afforded partial DDT residue removal by virtue of mechanical action only—for example, a surface residue of 1.0 p.p.m. was reduced to 0.6 p.p.m. by such treatment, but the residue in the calyx only was untouched (15 p.p.m., fresh weight of calyx only). Supplemental wash tests with other materials afforded the residue data collected in Table II. 

Wastewater is generated in the primary zinc and primary cadmium recovery subcategories by acid plant blowdown, which results from sulfuric acid recovery, air pollution control, leaching, anode/ cathode washing, and contact cooling. The streams may contain significant concentrations of lead, arsenic, cadmium, and zinc. Tables 3.26 and 3.27 present classical and toxic pollutant data for the primary zinc and primary cadmium subcategories. 

Soils amended with arsenic-contaminated plant tissues were not measurably affected in C02 evolution and nitrification, suggesting that the effects of adding arsenic to soils does not influence the decomposition rate of plant tissues by soil microorganisms (Wang et al. 1984). The half-life of cacodylic acid is about 20 days in untreated soils and 31 days in arsenic-amended soils (Hood 1985). Estimates of the half-time of inorganic arsenicals in soils are much longer, ranging from 6.5 years for arsenic trioxide to 16 years for lead arsenate (NRCC 1978). 

Arsenic trioxide Arsenic trioxide Cacodylic acid Lead arsenate Total arsenic... 

Inorganic arsenicals such as arsenic trioxide, sodium arsenite, lead arsenate, calcium arsenate and Paris Green have been used for many years as soil sterilants. Organic arsenical herbicides, in which the organic group is bonded directly to the arsenic atom, have been used extensively for post-emergence control of weeds in cotton. Several of the more important herbicides are sodium cacodylate (monosodium dimethylarsenic acid) and sodium salts of methane arsonic acid. The latter compounds exist in two principal forms the monosodium salt (MSMA) at pH6.4 and the disodium salt (DSMA) at pH10.2. 

The Advanced Recovery Systems, Inc. (ARS) developed the patented, ex situ DeCaF hydrometallurgical technology to decontaminate fluoride by-products and to recover recyclable metals. The technology uses a proprietary acid mixture to digest the fluoride matrix, freeing radioactive contaminants (e.g., uranium, thorium, or radium) and hazardous contaminants (e.g., lead, arsenic, or chromium). Radioactive elements are recycled or disposed. Metals are also recycled, and fluoride is recovered as a high-value salt for aluminum smelting. 

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