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1

Heavy metals uptake by microscopic fungi

100%
Slaba M., Dlugonski J.
Biotechnologia
|
2003
|
issue 4
101-109
EN
This review article describes interactions between heavy metals and microscopic fungi which immobilize those metals and can be used in practical application for cleaning up of toxic metals that contaminate the environment. The biosorption process and following factors: metal concentration, pH, amount of biomass, medium, temperature and biomass modification, influencing biosorption efficiency are described in more detail. The examples of highly-efficient desorption of metals from mycelium are presented, too. The role of fungal cell wall in heavy metal uptake is discussed.
2

Microbial degradation of pentachlorophenol

100%
Szewczyk R., Dlugonski J.
|
2007
|
issue 1
121-134
EN
Pentachlorophenol (PCP) is a toxic xenobiotic of great environmental concern. It has been widely used for many years as a bactericide, fungicide, defoliant, herbicide and wood preservative. In this article, PCP properties, microbial biodegradation and other approaches of this xenobiotic elimination from contaminated areas are reviewed.
3

Microbial transformation of organotins

100%
Bernat P., Dlugonski J.
Biotechnologia
|
2003
|
issue 4
69-81
EN
Organotins are ubiquitos in the environment. They are commonly used as a component of plant protective agents, antifouling paints, PVC stabilisers, catalyst and wood preservatives. Some organotins show deleterious effects on different organisms even at very low concentration. Of particular importance to the environment is high toxicity of tributyltin (TBT). Biotransformation of organotin compounds by dealkylation or methylation has been observed. This paper focused on the interactions of microorganisms with organotins including bioaccumulation, detoxification and degradation.
4

Biodegradation of oil-derived compounds by filamentous fungi

100%
Lisowska K., Dlugonski J.
Biotechnologia
|
2003
|
issue 4
92-100
EN
The development of industry, especially oil and chemical branches, resulted in the contamination of the natural environment by oil-derived compounds, including polycyclic aromatic hydrocarbons (PAHs). These compounds are highly toxic to the living organisms, most of them expressing carcinogenic properties. Microbiological degradation is one of the main methods of removing PAHs from the environment. Biodegradation reduces the costs of recultivation by considerable acceleration of the degradation of those compounds in the soil. Microscopic fungi play an important role in the process of PAHs detoxification and degradation. Our studies have shown that a number of strains involved in the steroids transformation are also capable of PAHs degradation. Due to the fact that both processes involve the participation of cytochrome P-450, these strains are convenient research models for explaining the dependence between steroid hydroxylases and enzymes responsible for PAHs degradation. The currently performed research is aimed at developing the possibilities of employing microorganisms used for the production of steroid drugs in the protection of the environment.
5

Microbial surfactants ? synthesis and commercial applications

100%
Paraszkiewicz K., Dlugonski J.
Biotechnologia
|
2003
|
issue 4
228-238
EN
This article reviews the information from the last decade in the world literature on microbial biosurfactants. Biosurfactants classification, kinetics of production and factors affecting synthesis of these compounds are described. Special emphasis is put on the natural roles played by surface active agents in the growth microorganisms which produce them. The development of biosurfactants genetics is presented and their potential commercial use is discussed.
6

Remediation of heavy metal-contaminated soil by microbial surfactants

100%
Paraszkiewicz K., Dlugonski J.
|
2007
|
issue 2
81-94
EN
The common use of heavy metals in several industrial applications has led to their wide distribution in the wastewaters, sediments and soils. Today, due to heavy metals high toxicity and non-biodegradable nature, metal-polluted soils have become one of the serious environmental problems. Remediation technologies developed for metal ? contaminated soil are based on: 1) allowing heavy metals to remain in the polluted site after decreasing their availability by solidification / stabilization processes, or 2) removing heavy metals from soil by e.g. phytoremediation or soil extraction (flushing/washing). Techniques such as ex situ soil washing and in situ soil flushing transfer heavy metals to liquid phase by desorption and solubilization. To support heavy metals' removal from soil matrix, the washing water used in these methods is usually augmented with acids, bases, chelating agents or surfactants. Biosurfactants, surface-active agents of biological origin, produced mainly by microorganisms, have gained considerable interest in environment remediation techniques due to some distinct advantages over the synthetic counterparts such as lower toxicity, higher biodegradability and high selectivity. This paper provides an overview of the application of biosurfactants for the remediation of heavy metal-contaminated soil. Promising alternative surfactant foam technology is described, too.
7

Biodegradation and detoxification of xenobiotics and compounds of natural origin

71%
Dlugonski J., Lisowska K., Paraszkiewicz K., Slaba M., Bernat P.
Biotechnologia
|
2003
|
issue 4
62-68
EN
Microscopic fungi are widely used for synthesis and transformation of biologically active compounds e.g. antibiotics, corticosteroids and androgens. The fungal strains applied for steroid hormone production are also able to attack pollutants, including deleterious xenobiotics e.g. polycyclic aromatic hydrocarbons (PAHs), chlorophenols or organotins to less toxic derivatives. Transformation, detoxification, and degradation of both types of hydrophobic substrates (steroids and xenobiotics), as well as heavy metals recovery from industrial wastes, are in the center of interest of Department of Industrial Microbiology and Biotechnology. This paper is a short review on a possibility of application of industrial strains for environment protection and an introduction to our detailed presentations (1-4) on this subject, during The 2nd National Biotechnology Congress in Lodz.
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