Lucian Staicu

Lucian Staicu
University of Warsaw | UW · Institute of Microbiology

PhD

About

48
Publications
11,232
Reads
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619
Citations
Citations since 2016
37 Research Items
578 Citations
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2016201720182019202020212022050100150
2016201720182019202020212022050100150
Introduction
https://staiculab.com/ Our research activity at Faculty of Biology (University of Warsaw) delves into anaerobic respiration of "exotic" elements (As and Se) in phylogenetically-diverse bacteria, biomineralization of As, Se and Pb, as well as on critical raw material recovery (minerals with high commercial value).
Additional affiliations
June 2018 - present
University of Warsaw
Position
  • Principal Investigator
Description
  • The project attempts to shed new light into the arsenic (As) and selenium (Se) metabolism by anaerobic bacteria. The two elements share common chemical properties and have a complex relationship with bacteria.
February 2016 - October 2016
Université Clermont Auvergne
Position
  • PostDoc Position
Description
  • Microbial metabolism of pesticides
April 2015 - January 2016
University of Franche-Comté
Position
  • PostDoc Position
Description
  • Treatment of industrial effluents by adsorption
Education
February 2016 - October 2016
Université Clermont Auvergne
Field of study
  • Microbiology, Bioremediation
April 2015 - January 2016
University of Franche-Comté
Field of study
  • Environmental Chemistry
November 2010 - December 2014
IHE Delft Institute for Water Education
Field of study
  • Biotechnology

Publications

Publications (48)
Article
Full-text available
Historically, sulfate-reducing bacteria (SRB) have been considered to be strict anaerobes, but reports in the past couple of decades indicate that SRB tolerate exposure to O2 and can even grow in aerophilic environments. With the transition from anaerobic to microaerophilic conditions, the uptake of Fe(III) from the environment by SRB would become...
Article
Bacteria play crucial roles in the biogeochemical cycle of arsenic (As) and selenium (Se) as these elements are metabolized via detoxification, energy generation (anaerobic respiration) and biosynthesis (e.g. selenocysteine) strategies. To date, arsenic and selenium biomineralization in bacteria were studied separately. In this study, the anaerobic...
Conference Paper
Full-text available
Shewanella sp. O23S (Shewanella baltica) was isolated from a dissimilatory arsenate-reducing bacteria (DARB) microbial mat that inhabits the bottom sediments from an ancient gold mine (Złoty Stok, SW Poland) [1]. This strain is unusual in its versatile metabolism of selenium (Se) and arsenic (As), being capable of both detoxification and respiratio...
Article
Full-text available
Microbes form biominerals via biologically-controlled mineralization (BCM) and biologically-induced mineralization (BIM) (Konhauser and Riding, 2012). BCM is commonly an intracellular process, where microbes employ genetic determinants and enzymes to induce mineralization. The end product (the biomineral) of BCM serves a biological function for its...
Article
The treatment of metal‐laden industrial effluents by reverse osmosis is gaining in popularity worldwide due to its high performance. However, this process generates a polymetallic concentrate (retentate) stream in need of efficient post‐treatment prior to environmental discharge. This paper presents results on the bioremediation (in batch mode) of...
Conference Paper
Full-text available
Industry is constantly searching for methods to treat waste fluxes in an attempt to minimize its environmental impact. Reverse osmosis (RO) is an efficient treatment system, generating a permeate stream (purified water passing through the membrane) and a retentate stream, which concentrates the constituents rejected by the membrane. Currently, a ho...
Article
Selenium (Se) respiration in bacteria was revealed for the first time at the end of 1980s. Although thermodynamically-favorable, energy-dense and documented in phylogenetically-diverse bacteria, this metabolic process appears to be accompanied by a number of challenges and numerous unanswered questions. Selenium oxyanions, SeO4²⁻ and SeO3²⁻, are re...
Article
Full-text available
Microbes and metals are intricately linked in a complex relationship. Many microbial pathways rely on metals for functionality, including enzymatic machinery (co-factors in key enzymes), dissimilatory reduction in energy generation (as alternative electron acceptors in anaerobic respiration) and biomineralization. Some metals share very close physi...
Presentation
The presentation explores the fundamentals of selenium metabolism in bacteria and its biotechnological applications.
Article
Full-text available
Bacillus sp. Abq, belonging to Bacillus cereus sensu lato, was isolated from an aquifer in New Mexico, USA and phylogenetically classified. The isolate possesses the unusual property of precipitating Pb(II) by using cysteine, which is degraded intracellularly to hydrogen sulfide (H2S). H2S is then exported to the extracellular environment to react...
Presentation
The seminar covered aspects related to the biomineralization of selenium and lead in bacteria and was hosted by prof. Anderas Kappler at Applied Earth Sciences (ZAG), University of Tübingen.
Article
Full-text available
Coal-fired power facilities generate a polymetallic effluent (Flue Gas Desulfurization-FGD) rich in sulfate. FGD effluents may be considered an important secondary resource. This paper investigates the recovery of sulfate as barite (BaSO4), a mineral with high commercial value and a critical raw material. Using equimolar BaCl2, >99% desulfurization...
Presentation
Abstract Selenium (Se) respiration in bacteria was revealed for the first time at the end of 1980s (Macy et al., 1989; Gunsalus et al., 2007). Although thermodynamically-favorable and documented in phylogenetically-diverse bacteria, this metabolic process appears to be accompanied by a number of challenges and numerous unanswered questions (Staicu...
Article
Full-text available
Our modern cities are resource sinks designed on the current linear economic model which recovers very little of the original input. As the current model is not sustainable, a viable solution is to recover and reuse parts of the input. In this context, resource recovery using nature-based solutions (NBS) is gaining popularity worldwide. In this spe...
Conference Paper
Coal-fired power stations generate a polymetallic, sulfate-rich effluent (Flue Gas Desulfurization - FGD) [1]. FGD effluents are currently considered an important secondary resource [2]. A quarter of the EU energy mix is based on coal combustion, the main consumers and FGD producers being Germany and Poland. This paper investigates the recovery of...
Conference Paper
Coal-fired power facilities generate a polymetallic effluent (Flue Gas Desulfurization – FGD) rich in sulfate [1]. FGD effluents are currently considered an important secondary resource yielding selenium nanoparticles, biogas and minerals [2]. Furthermore, FGD is produced in large volumes in EU (25% of its energy mix is based on coal combustion), U...
Conference Paper
Coal-fired power facilities generate a polymetallic effluent (Flue Gas Desulfurization – FGD) rich in sulfate [1]. FGD effluents are currently considered an important secondary resource yielding selenium nanoparticles, biogas and minerals [2]. Furthermore, FGD is produced in large volumes in EU (25% of its energy mix is based on coal combustion), U...
Conference Paper
Background: Bacteria are involved in the biogeochemical cycle of selenium (Se) being a key factor in the cycling of the element in Nature. Specialized bacteria show high selectivity towards selenium present in complex solutions (industrial effluents) because they employ enzyme systems with high affinity for this element. One such strain is Shewanel...
Chapter
Essential trace elements (TE) are a prerequisite that ensures optimal performance of the anaerobic digestion (AD) process. However, finding the proper way to deliver these micronutrients to microbial communities is not an easy task. The chemical speciation of TE and the complex environment characterizing AD play a critical role in their mobility, b...
Conference Paper
Selenium (Se) and bacteria are intimately linked in a complex interplay. Se serves both essential and energy generation functions for bacterial metabolism, in addition to behaving as a powerful toxicant under certain conditions. Conversely, bacteria are involved in all valence state transformations of Se, thus acting as a tremendous vehicle for the...
Conference Paper
Lead (Pb) ranks as a major anthropogenic pollutant because it is used extensively by industry and it has no known biological function. The toxic effects of Pb(II) include inhibition of protein synthesis, alteration of the osmotic balance, enzyme inhibition, nucleic acid damage, disruption of membrane functions and oxidative phosphorylation, and is...
Conference Paper
Selenium (Se) and bacteria interact in a complex interplay as the element serves a number of functions including i) assimilatory metabolism (production of aminoacids), ii) dissimilatory metabolism (production of cellular energy in the form of ATP), and iii) detoxification. Conversely, bacteria have been shown to mediate all known valence state tran...
Article
Coal combustion for energy generation has traditionally been associated with environmental pollution since the onset of Industrial Revolution. A waste stream (Flue Gas Desulfurization, FGD) derived from coal combustion in modern power plants is particularly enriched in chemical elements. Using a biologically and environmentally friendly approach, F...
Chapter
Selenium (Se) discharge into the environment is becoming a matter of increasing concern because it induces toxic effects to biota at low concentrations (several micrograms per liter). Industrial activities that include energy generation, metal and oil refining, mining, and agriculture irrigation generate effluents contaminated with selenium. Biolog...
Chapter
Industrial activities including mining, metal and petrol refining, coal-fired power generation, and intensive agriculture may generate wastes and effluents loaded with selenium (Se). Currently, even if Se discharge is strictly regulated in North America, the large volumes of selenium-laden effluents produced represent a critical problem for both in...
Chapter
Selenium (Se) is transformed by phylogenetically diverse bacteria following several basic strategies which include: (1) satisfying a trace element requirement for bacterial synthetic machinery (assimilatory metabolism), (2) cellular energy production coupled to oxidation/reduction reactions (dissimilatory metabolism), and (3) detoxification process...
Conference Paper
1. Introduction Selenium (Se) pollution has been linked to numerous episodes of severe aquatic ecosystem deterioration [1]. Flue Gas Desulfurization (FGD) effluents charged with Se and produced by coal-fired power facilities are arguably the most complex and difficult to treat [2]. In this paper, a real FGD effluent was characterized and the Se rem...
Poster
Full-text available
Anaerobic selenium-respiring micro-organisms are phylogenetically diverse (Nancharaiah & Lens, 2015), and critical for both global Se cycling and the biological treatment of Se-containing wastewaters. However, both Se biogeochemical cycling and the organisms underpinning it are understudied relative to others such as sulphate- and nitrate-respirers...
Chapter
Full-text available
Bacteria and selenium (Se) are closely interlinked as the element serves both essential nutrient requirements and energy generation functions. However, Se can also behave as a powerful toxicant for bacterial homeostasis. Conversely, bacteria play a tremendous role in the cycling of Se between different environmental compartments, and bacterial meta...
Article
Selenium (Se) removal from synthetic solutions and from real Flue Gas Desulfurization (FGD) wastewater generated by a coal-fired power plant was studied for the first time using a commercial iron oxide impregnated strong base anion exchange resin, Purolite® FerrIX A33E. In synthetic solutions, the resin showed high affinity for selenate and selenit...
Article
Full-text available
Pseudomonas moraviensis stanleyae was recently isolated from the roots of the selenium (Se) hyperaccumulator plant Stanleya pinnata. This bacterium tolerates normally lethal concentrations of SeO3(2-) in liquid culture, where it also produces Se nanoparticles. Structure and cellular ultrastructure of the Se nanoparticles as determined by cellular e...
Book
Full-text available
Selenium (Se) is a chalcogen element with a narrow window between essentiality and toxicity. The toxicity is mainly related to the chemical speciation that Se undergoes under changing redox conditions. Se oxyanions, namely selenite (Se[IV], SeO32-) and selenate (Se[VI], SeO42-), are water-soluble, bioavailable and toxic. In contrast, elemental sele...
Article
Full-text available
Identification of bacteria with high selenium tolerance and reduction capacity, for bioremediation of wastewaters and nanoselenium particle production. A bacterial endophyte was isolated from the selenium hyperaccumulator Stanleya pinnata (Brassicaceae) growing on seleniferous soils in Colorado, USA. Based on Fatty Acid Methyl Ester (FAME) analysis...
Article
Full-text available
Selenium (Se)-rich plants may be used to provide dietary Se to humans and livestock, and also to clean up Se-polluted soils or waters. This study focused on endophytic bacteria of plants that hyperaccumulate selenium (Se) to 0.5–1% of dry weight. Terminal restriction fragment length polymorphism (T-RFLP) analysis was used to compare the diversity o...
Article
Full-text available
Selenium (Se) has caused several ecological disasters due to its toxicity and bioaccumulation along trophic networks. A variety of industrial activities that use or process fossil fuels and mineral ores (e.g. electricity generation, metal extraction and oil refining) generates wastewaters containing selenium. Currently, these wastewaters are insuff...
Article
Full-text available
Colloidal elemental selenium, Se(0), adversely affects membrane separation processes and aquatic ecosystems. As a solution to this problem we investigated for the first time the removal potential of Se(0) by electrocoagulation process. Colloidal Se(0) was produced by a strain of Pseudomonas fluorescens and showed limited gravitational settling. The...
Article
The common selenium oxoanions selenite (SeO32-) and selenate (SeO42-) are toxic at intake levels slightly below 1 mg day-1. These anions are currently monitored by a variety of traditional analytical techniques that are time consuming, expensive, require large sample volumes, and/or lack portability. To address the need for a fast and inexpensive a...

Questions

Questions (2)
Question
Any idea about the sulfur content (mg/L) in lysogeny broth (LB) and yeast extract? All suggestions are welcome. Thanks!
Question
What do you recommend for bacterial siderophore detection under UV light? Fluorescent or non-fluorescent thin-layer chromatography plates?

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Projects

Projects (5)
Project
This project aims to optimize the treatment of the reject (retentate) streams produced by reverse osmosis (RO) units employed in the remediation of metal-laden industrial effluents. The treatment involves the use of specialized bacterial cultures (bioremediation) capable of arsenic (As) and selenium (Se) anaerobic respiration. In addition, selective chemical precipitation is used to recover valuable minerals and stabilize pollutants. The partners involved in the project are from Spain (University of Oviedo and University of Granada) and Poland (University of Warsaw).
Project
This Frontiers in Microbiology research topic on “Microbial biominerals – towards new functions and resource recovery” aims to assemble contributions from scientists working on geomicrobiology, biogeochemistry, environmental microbiology and microbial biotechnology. We encourage authors to contribute research articles that are interdisciplinary, including original research, methods, reviews and mini-reviews, as well as opinion articles. Broadly, we favour contributions covering the following areas of research: - Unravelling new functions of biominerals in bacteria - Elucidating novels aspects of the biomineralization process - Molecular mechanisms of biomineralization and bio-reduction of metals/metalloids - Role of biominerals in anthropogenic settings - Use of biominerals in decontaminating environmental pollution associated with metals - Recovery of biominerals with industrial relevance https://www.frontiersin.org/research-topics/16516/microbial-biominerals-towards-new-functions-and-resource-recovery
Project
The main aim of this project is to understand the respiration of arsenic and selenium oxyanions in phylogenetically-diverse anaerobic bacteria and to interpret this process from a broad perspective, including genetics, physiology and biochemistry.