Volatilization of mercury from natural water by a broad-spectrum Hg-resistant Bacillus pasteurii strain DR2
TL;DR: A broad spectrum mercury-resistant bacterial strain was isolated from contaminated water and was identified as Bacillus pasteurii strain DR2 as mentioned in this paper, which could volatilize Hg-compounds including organomercurials from its growth media.
About: This article is published in The Environmentalist.The article was published on 1996-09-01. It has received None citations till now. The article focuses on the topics: Mercury (element).
References
More filters
•
01 Jun 1985
TL;DR: In response to continuing accretion of reports of significant Hg contamination, the State of Florida has issued human health advisories that ban or restrict consumption of freshwater fishes from over 2 million acres of the Everglades and Big Cypress Swamp.
Abstract: Beginning with detection of elevated levels of mercury in largemouth bass in 1989 (FSU 1990; Ware et al. 1990), it has become increasingly apparent that the South Florida Ecosystem is extensively contaminated. In response to continuing accretion of reports of significant Hg contamination, the State of Florida has issued human health advisories that ban or restrict consumption of freshwater fishes from over 2 million acres of the Everglades and Big Cypress Swamp. Although Hg contamination has been detected at levels of concern in largemouth bass throughout the State (Lange et al. 1993), maximum concentrations found in Everglades largemouth bass (4.4 mg/kg) and bowfin (>7 mg/kg) are the highest Hg contaminant levels thus far reported from Florida waters. Mercury accumulation through the food chain may reduce the breeding success of wading birds (Frederick and Spalding 1994) and the viability of the endangered Florida panther (Roelke et al. 1991).
68 citations
••
01 Jan 198952 citations
••
TL;DR: Two genes of the meta pathway of phenol degradation were cloned from a phenol-utilizing strain of Bacillus stearothermophilus and were mapped by subcloning and by use of a Tn5 insertion mutation.
Abstract: Two genes of the meta pathway of phenol degradation were cloned from a phenol-utilizing strain of Bacillus stearothermophilus and were mapped by subcloning and by use of a Tn5 insertion mutation. They code for phenol hydroxylase and catechol 2,3-dioxygenase, respectively. The gene encoding catechol 2,3-dioxygenase, which is more thermostable than catechol 2,3-dioxygenase encoded by the other gene, shares rather limited homology with that from Pseudomonas putida.
49 citations
••
TL;DR: Mercury volatilization from soils amended to 1 ppM mercury with mercuric nitrate decreased substantially within 1 week after application as discussed by the authors, and 20% of the applied mercury was lost from a silty clay-loam soil.
Abstract: Mercury volatilization from soils amended to 1 ppM mercury with mercuric nitrate decreased substantially within 1 week after application. During the first week, 20% of the applied mercury was lost from a silty clay-loam soil and 45% was lost from a loamy sand soil. Volatilization of Hg from the loamy sand soil resulted in a concurrent decrease in ammonium nitrate-extractable mercury. Other work with sterile soil indicates that the volatilization was mediated by microorganisms.
47 citations
••
TL;DR: The sediments of Nagara river and its bystreams were extracted with ether and several kinds of polycyclic aromatic hydrocarbons (PAH) were found, and several peaks were unidentified, but these PAH may contribute substantially to the mutagenicity of this fraction.
Abstract: The sediments of Nagara river and its bystreams were extracted with ether. The mutagenicities of the extracts were determined by the Ames test with Salmonella typhimurium TA100 with S9 mix. The extracts were fractionated on an activated silica-gel column with four kinds of organic solvent, namely iso-octane, iso-octane:benzene (1:1), benzene:ethyl acetate (1:1) and benzene:methanol (1:1). The highest mutagenicity was observed in the iso-octane-benzene fraction of Arata river by using TA100 with S9 mix. Chemical substances in this fraction were identified by GC-MS and GC, and several kinds of polycyclic aromatic hydrocarbons (PAH) were found. Several peaks were unidentified, but these PAH, especially benzo [b] fluoranthene and benzo [a] pyrene, may contribute substantially to the mutagenicity of this fraction.
45 citations
"Volatilization of mercury from natu..." refers background in this paper
...These compounds are often carcinogenic and enhance mutagenicity ( Sato et al., 1983; Mix, 1986)....
[...]