Showing papers in "Water Research in 2013"

TL;DR: Recent development in nanotechnology for water and wastewater treatment is reviewed, covering candidate nanomaterials, properties and mechanisms that enable the applications, advantages and limitations as compared to existing processes, and barriers and research needs for commercialization.

TL;DR: The aim of the present paper is to critically review the fate and removal of various antibiotics in wastewater treatment, focusing on different processes (i.e. biological processes, advanced treatment technologies and disinfection) in view of the current concerns related to the induction of toxic effects in aquatic and terrestrial organisms.

TL;DR: The obtained results show the presence of 125 substances (80% of the target compounds) in European wastewater effluents, in concentrations ranging from low nanograms to milligrams per liter, which allow for an estimation to be made of a European median level for the chemicals investigated in WWTP effluent waters.

TL;DR: The reactive species for atrazine degradation in PMS/CuFe2O4 system were identified as hydroxyl radical (HO) and sulfate radical (SO4(·-), instead of commonly used alcohol scavenging, which was not a reliable method in metal oxide catalyzed oxidation.

TL;DR: This review aims to provide a holistic overview of current knowledge of magnetic nanoparticles in environmental applications, emphasizing studies of zero-valent iron (nZVI), magnetite (Fe3O4) and maghemite (γ-Fe2O3) nanoparticles.

TL;DR: From the tested antibiotic mixtures, it can be concluded that certain specific combinations may pose a potential ecological risk for aquatic ecosystems with the present environmentally measured concentrations.

TL;DR: This work presents a comprehensive review of 45 papers dealing with WWT and LCA, showing that within the constraints of the ISO standards, there is variability in the definition of the functional unit and the system boundaries, the selection of the impact assessment methodology and the procedure followed for interpreting the results.

TL;DR: An integrated approach, which combined freshwater microalgae Chlorella zofingiensis cultivation with piggery wastewater treatment, was investigated, where the advantageous nutrient removal and the highest productivities of biomass, lipid and biodiesel were presented.

TL;DR: This review summarizes major findings over the last decade related to nitrosamines in drinking water, with a particular focus on N-nitrosodimethylamine (NDMA), because it is among the most widely detected nitrosamine in drinking waters.

TL;DR: The more detailed analysis revealed that VF-HF hybrid constructed wetlands are slightly more efficient in ammonia removal than hybrid systems with FWS CWs, HF-VF systems or multistage VF and HF hybrid CWs which are comparable with single VF CWs in terms of NH4-N removal rates.

TL;DR: Investigation of chlorination effects on microbial antibiotic resistance in a drinking water treatment plant indicated that Proteobacteria were the main antibiotic resistant bacteria dominating in the drinking water and chlorine disinfection greatly affected microbial community structure, while prevalence of ARB and ARGs in chlorinated drinking water was highlighted.

TL;DR: Ag-NP discharged to the wastewater stream will become sulfidized to various degrees in the sewer system and are efficiently transported to the WWTP, but primarily depending on the size the Ag-NP, may not be complete.

TL;DR: Both the macroscopic and microscopic techniques demonstrated that the phosphate adsorption mechanism of am-ZrO2 nanoparticles followed the inner-sphere complexing mechanism, and the surface hydroxyl groups played a key role in the phosphate advertisersorption.

TL;DR: A relationship between antibiotic residues, bacterial community structure and composition and antibiotic resistance is demonstrated and further studies, involving more wastewater treatment plants may help to elucidate this complex relationship.

TL;DR: A critical assessment of the discourse that surrounds emerging approaches to urban water management and infrastructure provision is provided to highlight the limitations and strengths in the current lines of argument and point towards unaddressed complexities in the transformational agendas advocated by SUWM proponents.

TL;DR: Current knowledge on benthic cyanobacteria: ecology, toxin-producing species, variables that regulate toxin production and bloom formation, their impact on aquatic and terrestrial organisms and current monitoring and management strategies are reviewed.

TL;DR: This review critically evaluates the viability of biological treatment processes as a means to remove micropollutants from drinking water resources and proposes biological treatment and bioaugmentation as a potential targeted, cost-effective, and sustainable alternative to existing processes.

TL;DR: The Fe-Cu binary oxide could be a promising adsorbent for both As(V) and As(III) removal because of its excellent performance, facile and low-cost synthesis process, and easy regeneration.

TL;DR: It is demonstrated how by varying each parameter individually, it is possible to systematically optimize the parameter settings of a given system to achieve the highest average salt adsorption rate and water recovery.

TL;DR: The binding process was found to be driven mainly by the entropy change of the reaction, and it was found that Cu²⁺ bound with the oxygen atom in the carboxyl groups in the EPS molecules of activated sludge.

TL;DR: The potential utility of the nanoparticles as an effective adsorbent for fluoride removal from drinking water is demonstrated and anion exchange process was an important mechanism for fluoride adsorption by the sulfate-doped Fe3O4/Al2O3 nanoparticles.

TL;DR: Graphenes can serve as alternative adsorbents for removing SOCs from water, however, they will also, if released to environment, adsorb organic contaminants influencing their fate and impact in the environment.

TL;DR: Data is required for both evaluating the potential use of AO/RPs for the destruction of these compounds and for studies of their fate and transport in surface waters where radical chemistry may be important in assessing their lifetime.

TL;DR: Overall, the research described relatively stable COD removal, acceptable flux, and the ability to seed a psychrophilic AnMBR with mesophilic inocula, indicating future potential for the technology in practice, particularly in cold and temperate climates where DWW temperatures are low during part of the year.

TL;DR: The most sensitive and specific MST methodologies, based on an analysis of presence/absence of each marker in target and non-target fecal samples, were HF183 endpoint and HF183SYBR (human), CF193 and Rum2Bac (ruminant), CowM2 and CowM3 (cow), BacCan (dog), Gull2SYBR and LeeSeaGull (gull), and Pig2B Bac (pig).

TL;DR: Different advanced technologies: solar heterogeneous photocatalysis with TiO(2), solar photo-Fenton and ozonation, are studied as tertiary treatments for the remediation of micropollutants present in real municipal wastewater treatment plants effluents at pilot plant scale.

TL;DR: It is demonstrated that a stringent, reproducible staining protocol combined with fixed FCM operational and gating settings is essential for reliable quantification of bacteria and detection of changes in aquatic bacterial communities.

TL;DR: The most promising process was photo-Fenton modified with Ethylenediamine-N,N'-disuccinic acid (EDDS), as the pH remained in the neutral range, but has the disadvantage that the water must be previously acidified.

TL;DR: Thermodynamic studies were conducted under different reaction temperatures and results indicate that cesium adsorption by NiHCF-WS is an endothermic and spontaneous process.

TL;DR: Bacteria inhabiting biofilms, predominantly species belonging to genera Pseudomonas, Zooglea and Janthinobacterium, have an enhanced ability to express extracellular polymeric substances to adhere to surfaces and to favour co-aggregation between cells than those found in the bulk water.