Browsing by Author "Loeppert, Richard H."
Now showing items 1-20 of 25
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Jones, Robert Garret (2009-05-15)The objective of this research was to investigate the retention of arsenate (iAsV), arsenite (iAsIII), monomethyl arsenate (MMAsV) and dimethyl arsenate (DMAsV) by calcite and assess the impact of dissolved Ca2+, Mg2+, ...
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Loeppert, Richard H.; Jain, Amita; Raven, Klaus; Wang, Jianlin (Texas Water Resources Institute, 1997-06)Metal pollution of surface water resources in Texas is a significant problem, and is caused by the inflow of sediments from oil fields, old mines and industrial sites, and by the discharge of metal contaminated sewage and ...
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Roberts, Melissa Delane (Texas A&M University, 2005-08-29)Given that the mobility, bioavailability, and toxicity of arsenate in natural systems is often controlled by the strong binding capacity of iron oxyhydroxides, the objective of this study was to document the interactions ...
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He, Shiliang (Texas A&M University. Libraries, 1992)The stoichiometric Henry's law constant and dissociation constants for the carbonic acid system were experimentally determined in various aqueous solutions from 0 to 90°C to high ionic strengths by the solubility method ...
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Wee, Hun Young (Texas A&M University, 2004-11-15)The characterization of water treatment residuals containing arsenic was investigated in the first study. Arsenic desorption and leachability from the residuals were the focus of this study. Arsenic leaching from water ...
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Vempati, Rajan Kumar (Texas A&M University. Libraries, 1988)The objectives of this investigation were to study the mineralogy, surface composition and reactivity of Si-containing ferrihydrites, and to evaluate these materials as Fe amendments for calcareous soils. Ferrihydrite with ...
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Lopez Collado, Catalino Jorge (Texas A&M University, 2007-04-25)The objectives of this work were to evaluate the vegetative parameters used to estimate crop N demand and to estimate the accuracy and precision of the conceptual model of fertilization using an error propagation method. ...
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Hebert, Andrew Brian (Texas A&M University, 2005-11-01)Seagrass productivity is largely limited by nutrient and light availability. However, increasing evidence suggests that sedimentary geochemical processes may play an essential role in seagrass productivity/health. Much ...
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Smith, Tad Monnett (Texas A&M University. Libraries, 1991)The Mississippian Mission Canyon Formation (Osagean to lower Meramecian) occurs in central and southwestern Montana as a thick sequence of interbedded shallow water limestones and dolostones. Most of the dolomite in the ...
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Kulkarni, Dhananjay Vijay (Texas A&M University, 2006-08-16)Perchloroethylene (PCE) is a toxic contaminant that has been introduced into the environment over many years through industrial and agricultural wastes. Research has been done in the past to investigate PCE degradation by ...
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Mahamane, Sabiou (2009-05-15)Cowpea (Vigna ungiculata L. Walp) is a major food and fodder legume in poor countries, particularly Sub-Saharan Africa countries. It is generally produced in sandy, acid soils, deficient in phosphorus (P) which severely ...
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Yean, Su Jin (Texas A&M University, 2005-11-01)Extraction with sodium phosphate has been used as a method of accessing arsenic in soils. Arsenic extraction efficiency by phosphate from rice-paddy soils of Bangladesh usually has been low and highly variable between ...
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Camacho, Julianna G. (Texas A&M University, 2006-04-12)One of the most toxic environmentally mobile compounds found in water is arsenic. It has been used as a pesticide to control insects, fungi, weeds and rodents since the early part of this century because of its high toxicity. ...
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Interaction of organic compounds with carbonate mineral surfaces in seawater and related solutions Zullig, James Joseph (Texas A&M University. Libraries, 1985)The selective adsorption of the C[4] to C[14] fatty acid homologs, twelve amino acids, and a series of synthetic polyglutamic acids of variable monomer unit size with the surfaces of calcite, aragonite, dolomite, and ...
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Kim, Eun Jung (2009-05-15)Sulfide minerals have been suggested to play an important role in regulating dissolved metal concentrations in anoxic environments. Pyrite is the most common sulfide mineral and it has shown an affinity for arsenic, but ...
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Bangira, Courage (2012-02-14)Although soils developed from ultramafic parent materials have significance to agriculture, ecology and health, their bio-geochemistry is poorly understood. The mineralogical and bio-geochemistry of soils formed from the ...
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Adam, Adam Ibrahim (Texas A&M University. Libraries, 1982)The major soils comprising the Gezira scheme are Hosh, Suleimi and Laota. These soils are dark grayish brown to dark brown, calcareous clays with < 1% organic matter.<p> The mineralogical data show that the soils of the ...
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Dash, Bhagirathi (Texas A&M University, 2007-04-25)In this research, important stress and redox regulatory genes present in Hydra vulgaris were isolated and characterized to facilitate our understanding of the evolution and mechanisms of stress response. H. vulgaris heat ...
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Kang, Misun (Texas A&M University, 2004-09-30)New, rapid techniques to quantify the different pools of soil organic matter (SOM) are needed to improve our understanding of the dynamics and spatio-temporal variability of SOM in terrestrial ecosystems. In this study, ...
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Kannewischer, Ines (2009-05-15)Smectite clay has been shown in studies over the past 20 years to sorb aflatoxin B1 (AfB1) in animal feed and thereby reduce its toxic influence on animals. In this study, 20 smectite samples were selected from industrial ...