Author
E. Vàzquez
Bio: E. Vàzquez is an academic researcher from Polytechnic University of Catalonia. The author has contributed to research in topics: Cement & Sludge. The author has an hindex of 3, co-authored 3 publications receiving 1194 citations.
Topics: Cement, Sludge, Carbonation, Mortar, Groundwater recharge
Papers
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TL;DR: In this paper, four different recycled aggregate concretes were produced; made with 0, 25, 50, 50 and 100% of recycled coarse aggregates, respectively, in order to achieve the same compressive strengths.
1,260 citations
TL;DR: In this paper, a binding and stabilising matrix with sludge and coal fly ash was created, which was used to create a binding matrix for sludge-cement and coal-fly ash pastes.
96 citations
TL;DR: In this paper, the authors present an effective alternative for the final destination of sludge from urban waste water treatment plants by its use as a component of mortar or concrete and assess the products of the carbonation by 29Si RNM-MA nuclear magnetic resonance of solids.
69 citations
TL;DR: In this article , the authors studied the inputs and processes controlling the hydrochemistry of Barcelona urban groundwater with special emphasis on the contaminants of emerging concern (CEC), as they pose a high risk to the aquatic environment and human health.
Abstract: Abstract. Groundwater is a vital resource for the development of
urban areas, where the problem focuses on the quantity and on the quality of
this freshwater resource. Barcelona is a good example as because currently
groundwater is used for irrigation of parks and gardens and street cleaning
due to its poor quality as drinking water source. Among the pollutants found
in groundwater, of special interest are contaminants of emerging concern
(CEC), as they pose a high risk to the aquatic environment and human health.
The behaviour, spatial distribution and processes that control them in the
aquatic environment are still uncertain and most of them are unregulated. In
this paper we study the inputs and processes controlling the hydrochemistry
of Barcelona urban groundwater with special emphasis on the CEC. We selected
29 CEC that were detected at high concentrations of up to 1 µg L−1 (e.g.
gemfibrozil, benzotriazole, among others). Towards the higher zones we
identify groundwater with relative low mineralization more proximate to the
natural recharge composition, while towards the urban area the anthropic
inputs are evident (e.g. nitrate concentrations range from 50 to 200 mg L−1).
Near the Besòs river there is a clear contribution from this superficial
water highly polluted, mostly from wastewater treatment plant (WWTP)
discharges, and reducing conditions. The main contributor of CEC pollution
in groundwater was the river-aquifer interaction (Besòs river), while
towards the urban area it might come from sewage seepage and probably a
minor input from urban runoff. The redox state of these waters seems to
control the fate and occurrence of several of these CEC. The limitations of
this study are restricted to a single sampling campaign, therefore these
results should be corroborated with other sampling campaigns, including the
seasonal variations, which would allow establishing more robust conclusions.
Cited by
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TL;DR: In this article, the authors review past and future trends in sludge handling, focusing mainly at thermal processes (e.g. pyrolysis, wet oxidation, gasification) and the utilization of sewage sludge in cement manufacture as a co-fuel.
Abstract: The European Union has made progress in dealing with municipal wastewater in individual countries and as a corporate entity. However, it intends to make still further and substantial progress over the next 15 years. Currently, the most widely available options in the EU are the agriculture utilization, the waste disposal sites, the land reclamation and restoration, the incineration and other novel uses. The selection of an option on a local basis reflects local or national, cultural, historical, geographical, legal, political and economic circumstances. The degree of flexibility varies from country to country. In any case sludge treatment and disposal should always be considered as an integral part of treatment of wastewater. There is a wide range of other uses for sludge, which exploit its energy or chemical content, namely the thermal processes. The present paper sought to review past and future trends in sludge handling, focusing mainly at thermal processes (e.g. pyrolysis, wet oxidation, gasification) and the utilization of sewage sludge in cement manufacture as a co-fuel.
1,242 citations
TL;DR: The effects of the accelerated carbonation reaction on the solid phase are discussed and future potential applications of this technology are also considered.
768 citations
TL;DR: A brief status of recycled aggregate concrete made from recycled aggregate, summarizes and critically analyses some of the most important research findings over the past few years regarding the material aspects is given in this article.
763 citations
TL;DR: A series of investigations on the mechanical property, durability, and structural performance of recycled aggregate concrete (RAC) have been carried out in the past 15 years (1996-2011) in China.
739 citations
TL;DR: In this article, the authors examined the factors affecting the physical, chemical, mechanical, permeation and compositional properties of recycled aggregates sourced from construction and demolition waste, intended for concrete production.
730 citations