Organic Contaminants from Industrial Wastewaters: Identification, Toxicity and Fate in the Environment

Dsikowitzky, Larissa; Schwarzbauer, Jan

doi:10.1007/978-3-319-02387-8_2

Cited by 16 publications

(11 citation statements)

References 172 publications

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“…Interest in the biological treatment of industrial wastewater has increased in recent decades due to the increased pollution of water resources and its implications for human health. Among the industrial sectors, those that use organic solvents in the production of paints, adhesives, rubber, pharmaceutical and petroleum products, among others, can generate large quantities of solvent polluted wastewater (Dsikowitzky and Schwarzbauer, 2013;Oktem et al, 2007). Organic solvents are flammable, malodorous and potentially toxic to aquatic ecosystems and thus require complete elimination by wastewater treatment (Henry et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Granulation and microbial community dynamics in the chitosan-supplemented anaerobic treatment of wastewater polluted with organic solvents

et al. 2018

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The effect of chitosan on the development of granular sludge in upflow anaerobic sludge blanket reactors (UASB) when treating wastewater polluted with the organic solvents ethanol, ethyl acetate, and 1-ethoxy-2-propanol was evaluated. Three UASB reactors were operated for 219 days at ambient temperature with an organic loading rate (OLR) of between 0.3 kg COD m d and 20 kg COD m d. One reactor was operated without the addition of chitosan, while the other two were operated with the addition of chitosan doses of 2.4 mg gVSS two times. The three reactors were all able to treat the OLR tested with COD removal efficiencies greater than 90%. However, the time required to reach stable operation was considerably reduced in the chitosan-assisted reactors. The development of granules in the reactors with chitosan was accelerated and granules larger than 2000 μm were only observed in these reactors. In addition, these granules exhibited better physicochemical characteristics: the mean particle diameter (540 and 613 μm) was approximately two times greater than in the control reactor (300 μm), and the settling velocities exceeded 35 m h. The extracellular polymeric substances (EPS) in the reactors with the chitosan was found to be higher than in the control reactor. The protein-EPS content has been correlated with the granule size. The analyses of the microbial communities, performed through denaturing gradient gel electrophoresis and high-throughput sequencing, revealed that the syntrophic microorganisms belonging to genus Geobacter and the hydrogenotrophic methanogen Methanocorpusculum labreanum were predominant in the granules. Other methanogens like Methanosaeta species were found earlier in the chitosan-assisted reactors than in the control reactor.

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Section: Introductionmentioning

confidence: 99%

Granulation and microbial community dynamics in the chitosan-supplemented anaerobic treatment of wastewater polluted with organic solvents

et al. 2018

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“…These studies enlightened the diversity of compounds discharged by municipal wastewaters and contributed to study their fate in the environment. However, our knowledge of emerging contami nants from industrial sources is even more limited because of the heterogenic composition of industrial wastewaters (Dsiko witzky and Schwarzbauer, 2013).…”

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confidence: 99%

Hexa(methoxymethyl)melamine: An Emerging Contaminant in German Rivers

Dsikowitzky¹,

Schwarzbauer²

2015

Water Environment Research

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Hexa(methoxymethyl)melamine (HMMM)-containing resins are used in the production of coatings and plastics for cans, coils, and automobiles. A previous study demonstrated that this compound was associated with acute toxic effects on daphnia. This study presents the first compiled data on the occurrence of HMMM as an emerging contaminant in German rivers. The compound occurred in 60 of 117 water samples from three river systems, with concentrations ranging between <10 and 880 ng/L. Based on water concentrations and river flow on the day of sampling, the loads of HMMM were calculated for two rivers. The spatial distribution patterns of the loads showed large variations and did not follow clear trends along the stream course. These variations were attributed to effective removal processes, leading to sudden load decreases within short flow distances. The data suggest that HMMM could be discharged to the investigated rivers with wastewaters from the automotive industry and related branches. Water Environ. Res., 87, 461 (2015).KEYWORDS: 2,4,6-tris[bis(methoxymethyl)amino]-l,3,5-triazine, river w ater, em erging pollu tan ts, in d u strial effluents, hexakis(methoxymethyl)melamine.

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“…All these experiments were made by using the same dose of catalyst (0.5 g L −1 ) in 50 mL of Cr(VI) aqueous solution (50 mg L −1 ) containing three equiv. of organic pollutants that represent typical concentrations in industrial wastewaters [32,33]. The results showed that the Cr(VI) photoreduction in the presence of citric acid and EDTA is much faster than with phenol ( Figure 3c); the photocatalytic reaction with citric acid and EDTA was complete within only~15-20 min.…”

Section: Photocatalytic Study Of Mfo-zfo Mnasmentioning

confidence: 97%

Mesoporous Composite Networks of Linked MnFe2O4 and ZnFe2O4 Nanoparticles as Efficient Photocatalysts for the Reduction of Cr(VI)

et al. 2021

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Semiconductor photocatalysis has recently emerged as an effective and eco-friendly approach that could meet the stringent requirements for sustainable environmental remediation. To this end, the fabrication of novel photocatalysts with unique electrochemical properties and high catalytic efficiency is of utmost importance and requires adequate attention. In this work, dual component mesoporous frameworks of spinel ferrite ZnFe2O4 (ZFO) and MnFe2O4 (MFO) nanoparticles are reported as efficient photocatalysts for detoxification of hexavalent chromium (Cr(VI)) and organic pollutants. The as-prepared materials, which are synthesized via a polymer-templated aggregating self-assembly method, consist of a continuous network of linked nanoparticles (ca. 6–7 nm) and exhibit large surface area (up to 91 m2 g−1) arising from interstitial voids between the nanoparticles, according to electron microscopy and N2 physisorption measurements. By tuning the composition, MFO-ZFO composite catalyst containing 6 wt.% MFO attains excellent photocatalytic Cr(VI) reduction activity in the presence of phenol. In-depth studies with UV-visible absorption, electrochemical and photoelectrochemical measurements show that the performance enhancement of this catalyst predominantly arises from the suitable band edge positions of constituent nanoparticles that efficiently separates and transports the charge carriers through the interface of the ZFO/MFO junctions. Besides, the open pore structure and large surface area of these ensembled networks also boost the reaction kinetics. The remarkable activity and durability of the MFO-ZFO heterostructures implies the great possibility of implementing these new nanocomposite catalysts into a realistic Cr(VI) detoxification of contaminated wastewater.

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Organic Contaminants from Industrial Wastewaters: Identification, Toxicity and Fate in the Environment

Cited by 16 publications

References 172 publications

Granulation and microbial community dynamics in the chitosan-supplemented anaerobic treatment of wastewater polluted with organic solvents

Granulation and microbial community dynamics in the chitosan-supplemented anaerobic treatment of wastewater polluted with organic solvents

Hexa(methoxymethyl)melamine: An Emerging Contaminant in German Rivers

Mesoporous Composite Networks of Linked MnFe2O4 and ZnFe2O4 Nanoparticles as Efficient Photocatalysts for the Reduction of Cr(VI)

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