Author
Pedro J. J. Alvarez
Other affiliations: University of Minnesota, University of Michigan, Universidade Federal de Santa Catarina ...read more
Bio: Pedro J. J. Alvarez is an academic researcher from Rice University. The author has contributed to research in topics: Bioremediation & Medicine. The author has an hindex of 89, co-authored 378 publications receiving 34837 citations. Previous affiliations of Pedro J. J. Alvarez include University of Minnesota & University of Michigan.
Topics: Bioremediation, Medicine, Chemistry, Adsorption, Bioaugmentation
Papers published on a yearly basis
Papers
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TL;DR: The effect of groundwater chemistry on the formation and reactivity of such microbial-produced, abiotic reductants was investigated in this article, where Shewanella alga BrY, a dissimilatory iron reducing bacterium (DIRB), transformed inert ferric oxides that are common in sediments, aquifer material and passivated permeable reactive iron barriers (PRBs), producing dissolved and sorbed Fe(II) capable of rapidly reducing and immobilizing Cr(VI).
11 citations
TL;DR: It is infers that aerobic sites with higher dioxane concentrations are more likely to select and sustain a thriving population of doxane degraders, while sites with relatively low dioxan concentrations would be more difficult to attenuate naturally and may require alternative remediation strategies.
11 citations
TL;DR: A group of international experts participated in a workshop organized by the Academy of Sciences of Nicaragua to review this ESIA and concluded that the ESIA does not meet international standards; essential information is lacking regarding the potential impacts on the lake, freshwater and marine environments, and biodiversity.
Abstract: The proposed interoceanic canal will connect the Caribbean Sea with the Pacific Ocean, traversing Lake Nicaragua, the major freshwater reservoir in Central America. If completed, the canal would be the largest infrastructure-related excavation project on Earth. In November 2015, the Nicaraguan government approved an environmental and social impact assessment (ESIA) for the canal. A group of international experts participated in a workshop organized by the Academy of Sciences of Nicaragua to review this ESIA. The group concluded that the ESIA does not meet international standards; essential information is lacking regarding the potential impacts on the lake, freshwater and marine environments, and biodiversity. The ESIA presents an inadequate assessment of natural hazards and socioeconomic disruptions. The panel recommends that work on the canal project be suspended until an appropriate ESIA is completed. The project should be resumed only if it is demonstrated to be economically feasible, environmentally acceptable, and socially beneficial.
11 citations
01 Mar 2010
TL;DR: The authors summarizes the extent of this water footprint and explores mechanisms for reducing the resulting impacts and explores how to reduce the water footprint of dedicated crops used for bio-fuels in the US.
Abstract: The US mandates for increased use of domestically produced biofuels will help to reduce the dependence on imported oil, yet it will necessitate the increased use of our earth and ecosystem services, our ‘natural capital’. Biofuels can be sustainably produced if we recognize the limits of our soil, water and air resources to provide these services. Many of the dedicated crops used for biofuels have a significant water footprint. That is, they consume water for growth and evapotranspiration, and a fraction of the agrochemicals used to obtain higher yields are leached into surface water bodies. This opinion summarizes the extent of this water footprint and explores mechanisms for reducing the resulting impacts.
10 citations
TL;DR: Earthworms avoided both soils when amended with 1% of the smaller and more hydrophilic MLGs (G2 and G3), leading to a decreased trend in worm cocoon formation, and oxidative damage was more pronounced upon exposure to moreHydrophobic and larger graphenic materials (G1 and G2), which were attributed to facilitated adhesion to and disruption of worm membranes.
10 citations
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TL;DR: It is anticipated that this review can stimulate a new research doorway to facilitate the next generation of g-C3N4-based photocatalysts with ameliorated performances by harnessing the outstanding structural, electronic, and optical properties for the development of a sustainable future without environmental detriment.
Abstract: As a fascinating conjugated polymer, graphitic carbon nitride (g-C3N4) has become a new research hotspot and drawn broad interdisciplinary attention as a metal-free and visible-light-responsive photocatalyst in the arena of solar energy conversion and environmental remediation. This is due to its appealing electronic band structure, high physicochemical stability, and “earth-abundant” nature. This critical review summarizes a panorama of the latest progress related to the design and construction of pristine g-C3N4 and g-C3N4-based nanocomposites, including (1) nanoarchitecture design of bare g-C3N4, such as hard and soft templating approaches, supramolecular preorganization assembly, exfoliation, and template-free synthesis routes, (2) functionalization of g-C3N4 at an atomic level (elemental doping) and molecular level (copolymerization), and (3) modification of g-C3N4 with well-matched energy levels of another semiconductor or a metal as a cocatalyst to form heterojunction nanostructures. The constructi...
5,054 citations
TL;DR: The mechanisms of generation and potential impacts of microplastics in the ocean environment are discussed, and the increasing levels of plastic pollution of the oceans are understood, it is important to better understand the impact of microPlastic in the Ocean food web.
4,706 citations
TL;DR: In this paper, the complex mechanisms of Fenton and Fenton-like reactions and the important factors influencing these reactions, from both a fundamental and practical perspective, in applications to water and soil treatment, are discussed.
Abstract: Fenton chemistry encompasses reactions of hydrogen peroxide in the presence of iron to generate highly reactive species such as the hydroxyl radical and possibly others. In this review, the complex mechanisms of Fenton and Fenton-like reactions and the important factors influencing these reactions, from both a fundamental and practical perspective, in applications to water and soil treatment, are discussed. The review covers modified versions including the photoassisted Fenton reaction, use of chelated iron, electro-Fenton reactions, and Fenton reactions using heterogeneous catalysts. Sections are devoted to nonclassical pathways, by-products, kinetics and process modeling, experimental design methodology, soil and aquifer treatment, use of Fenton in combination with other advanced oxidation processes or biodegradation, economic comparison with other advanced oxidation processes, and case studies.
3,218 citations
TL;DR: Due to complexity of soil-water system in nature, the effectiveness of biochars on remediation of various organic/inorganic contaminants is still uncertain.
3,163 citations
TL;DR: The technical feasibility of various low-cost adsorbents for heavy metal removal from contaminated water has been reviewed and it is evident from the literature survey of about 100 papers that low- cost adsorbent have demonstrated outstanding removal capabilities for certain metal ions as compared to activated carbon.
3,072 citations