Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Arsenic content"”.
-
Mitigation of Inorganic Arsenic in Rice
Arsenic and its inorganic compounds are classified as class one non-threshold carcinogen. Arsenic’s main route in to the human body is by ingestion of rice, as rice is the staple diet of over half the world population. Here I present results from global survey of market available polished white …
-
Arsenic transport in groundwater, surface water, and the hyporheic zone of a mine-influenced stream-aquifer system
We investigated the transport of dissolved arsenic in groundwater, surface water and the hyporheic zone in a stream-aquifer system influenced by an abandoned arsenopyrite mine. Mine tailing piles consisting of a host of arsenic-bearing minerals including arsenopyrite and scorodite remain adjacent …
-
The role of colloidal phase in the measurement of pollutants in natural waters
… used to date have included the toxic metalloid arsenic and the fluorescent compound Rhodamine B, which had also been used to improve sensitivity. The behaviour of engineered labelled colloidal sols has been investigated during the preliminary filtration study in the laboratory. Artificial …
-
Arsenic Release from Chlorine Promoted Oxidation of Pyrite in the St. Peter Sandstone Aquifer, Eastern Wisconsin
High arsenic concentrations (>100 ppb) have been measured in wells completed in the Ordovician St. Peter sandstone aquifer of eastern Wisconsin. The primary source of arsenic is As-bearing sulfide minerals within the aquifer. There is concern that periodic disinfection of wells by chlorination may …
-
Total arsenic and arsenic speciation in indigenous food stuffs
… elemental speciation. This study evaluates the arsenic species found in a range of food stuffs together with growing environments and toxicity issues. Total arsenic concentrations in fish tissue and vegetable crops were determined by ICP-MS following microwave-assisted acid digestion using …
-
A Cluster-Based Randomized Controlled Trial Promoting Community Participation in Arsenic Mitigation Efforts in Bangladesh
… drink water which exceeds the Bangladesh arsenic (As) standard of 50 micrograms per liter. Exposure to elevated levels of inorganic As (As) is associated with cancers of the skin, bladder, and lung, developmental effects, cardiovascular disease, skin lesions, and decreased children's …
-
Laboratory and Field Studies Directed toward Accelerating Arsenic Remediation at a Major US Superfund Site in New Jersey
Arsenic is a prevalent contaminant at a large fraction of US Superfund sites. Therefore, establishing techniques for accelerating As remediation could benefit many contaminated sites. Remediation of As contaminated groundwater by conventional methods, i.e. pump and treat (P&T), can be impeded by …
-
Dynamics of soil processes under extreme meteorological boundary conditions - response of below-ground carbon, sulfur, and iron cycling in fen soils
… identified to be notable sources or sinks for arsenic. The close association of arsenic with the iron- and sulphur-dynamics – and thus redox dynamics during fluctuations of the water table level in general – is already known. Nevertheless, there exist hardly any study investigating arsenic …
-
Self-assembled optical diffraction sensor for water quality monitoring : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Engineering, Massey University, Albany, New Zealand
… involves metallic particles such as arsenic, lead, etc. Of these contaminants, arsenic (As) is a major concern due to its mutagenic and carcinogenic effects on human health. The World Health Organisation has recommended the maximum contamination limit (MCL) for arsenic in drinking …
-
Biogeochemical Transformations of Trace Element Pollutants During Coal Combustion Product Disposal
… for the toxic elements such as mercury, arsenic, and selenium. This dissertation research focused on the biogeochemical transformations of mercury, arsenic, and selenium associated with coal ash materials in an effort to: (1) define the key environmental parameters controlling mercury, …
-
Treatment of syphilis with Salvarsan
… a parasiticidal action into three groups. 1. Arsenic and Antimony. 2. The Azo dyes e.g. trypan red, and trypan blue. 3. The basic triphenylmethane dyes e.g. parafuchsin, methyl violet, and pyrornin. The action of these drugs was tried upon trypanosomes and the spirilla of relapsing fever and …