Distribution of Articles published per year
(1992 - 2013)
(1992 - 2013)
Total number of journals
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Article 0 Reads 0 Citations New lab-made coagulant based on Schinopsis balansae tannin extract: synthesis optimization and preliminary tests on refr... Published: 27 November 2013
Applied Water Science, doi: 10.1007/s13201-013-0141-y
Quebracho colorado tannin extract was used as a coagulant raw material for water and wastewater treatment. The chemical synthesis follows a Mannich reaction mechanism and provides a fully working coagulant that can remove several pollutants from water. This paper addresses the optimization of such synthesis and confirms the feasibility of the coagulant by testing it in a preliminary screening for the elimination of dyes and detergents. The optimum combination of reagents was 6.81 g of diethanolamine (DEA) and 2.78 g of formaldehyde (F) per g of tannin extract. So obtained coagulant was succesfully tested on the removal of 9 dyes and 8 detergents.
Article 0 Reads 0 Citations OP0056 The PTPN22/CSK Signalling Pathway is Involved in Susceptibility to Develop Giant Cell Arteritis Published: 01 June 2013
Annals of the Rheumatic Diseases, doi: 10.1136/annrheumdis-2013-eular.261
Background The PTPN22/CSK signalling represents one of the most relevant pathways in the innate immunity, and it has been implicated in the susceptibility to develop a wide number of autoimmune diseases. Objectives To analyse the possible role of different single-nucleotide polymorphisms of the PTPN22 and CSK genes in the predisposition and clinical phenotypes of giant cell arteritis (GCA) in a large Caucasian population. Methods Our study population consisted of 623 patients diagnosed with biopsy-proven GCA and 1,729 healthy controls of Spanish Caucasian origin. Two functional PTPN22 polymorphisms (rs24746601, R620W and rs33996649, R263Q) and two variants of the CSK gene (rs1378942 and rs34933034), previously associated with autoimmunity, were genotyped using specifically designed TaqMan® assays. Results A significant association of the PTPN22 non-synonymous change rs2476601 with GCA susceptibility was yielded after the analysis of the allele frequencies (P=1.06E-04, OR= 1.62, CI 95% 1.29-2.04). No statistically significant differences between cases and controls of the rest of SNPs analysed were observed. Similarly, when patients were stratified according to specific clinical features of GCA, such as polymyalgia rheumatica (PMR), visual ischemic manifestations (VIM) or irreversible occlusive disease (IOD), only significant differences were found between the case subgroups and the control set for PTPN22 rs2476601 (P=2.26E-04, OR=1.77 CI 95% 1.30-2.40; P=1.03E-03, OR=1.82 CI 95% 1.27-2.62; P=5.47E-04, OR=2.14 CI 95% 1.38-3.33, respectively). Conclusions Our results clearly suggest that the PTPN22 polymorphism rs2476601 is associated with susceptibility to GCA. Disclosure of Interest None Declared
Article 0 Reads 1 Citation Advanced Photochemical Degradation of Emerging Pollutants: Methylparaben Published: 04 April 2013
Water, Air, & Soil Pollution, doi: 10.1007/s11270-013-1483-7
This paper addresses the oxidation by ultraviolet radiation of methylparaben, a ubiquitous and suspicious preservative which is massively added to cosmetics and personal care products. Experiments included pH and temperature variation, as well as several experimental conditions such as presence/absence of hydrogen peroxide, titanium dioxide, or some different water matrix (surface water or ground water). Results were evaluated under the line source spherical emission model, so quantum yield was the adequate target variable for explaining the process. A modified Arrhenius correlation including pH level was used for modelling the whole system.
Article 2 Reads 1 Citation Performance and characterization of a new tannin-based coagulant Published: 13 April 2012
Applied Water Science, doi: 10.1007/s13201-012-0037-2
Diethanolamine and formaldehyde were employed to cationize tannins from black wattle. This novel coagulant called CDF was functionally characterized in removing sodium dodecylbenzene sulfonate (anionic surfactant) and Palatine Fast Black WAN (azoic dye). Refined tannin-derived commercial coagulants exhibited similar efficiency, while CDF presented higher coagulant ability than alum, a usual coagulant agent. Low doses of CDF (ca. 100 mg L−1) were able to remove more than 70 % of surfactant and more than 85 % of dye (initial pollutant concentration of ca. 100 mg L−1) and it presented no temperature affection and worked at a relatively wide pH range. Surfactant and dye removal responded to the classical coagulant-and-adsorption models, such as Frumkin–Fowler–Guggenheim or Gu and Zhu in the case of surfactant, and Langmuir and Freundlich in the case of dye.
Article 1 Read 4 Citations Improvement of the flocculation process in water treatment by using moringa oleifera seeds extract Published: 01 January 2012
Brazilian Journal of Chemical Engineering, doi: 10.1590/s0104-66322012000300006
BOOK-CHAPTER 0 Reads 0 Citations Nature Is the Answer: Water and Wastewater Treatment by New Natural-Based Agents Published: 01 January 2012
Advances in Water Treatment and Pollution Prevention, doi: 10.1007/978-94-007-4204-8_12
Environmental concerns regarding water quality are relevant nowadays because of their impact in human life. Persistent contaminants, such as heavy metals, dyes, or surfactants, have become a permanent menace to the fragile environmental equilibrium. Although their presence is due to the increasing level of industrial and economical development in large areas, it is even more mandatory to implement new and efficient systems for removing them from effluents.