Efficient water resources management in Cr(VI) impacted water bodies

[CEST2019_00726] Evaluation of calcium polysulfide as a reducing agent for the restoration of a Cr(VI)-contaminated aquifer
by Mpouras T., Papassiopi N., Lagkouvardos K., Mystrioti C., Dermatas D.

This work aims at investigating the efficiency of applying calcium polysulfide (CPS) as a reducing agent for the decontamination of a heavily Cr(VI)-contaminated aquifer. Series of batch experiments were carried out in order to evaluate the reductive behavior of CPS towards the aqueous and solid phase. CPS was added in several stoichiometric excesses (2.0X, 2.6X, 4.6X and 6.5X) with respect to the Cr(VI) concentration measured in the contaminated groundwater. The effect of time on Cr(VI) reduction by CPS was tested performing short term batch experiments.

Session: 14, Room: B, at Thu, 09/05/2019 - 16:15 to 16:30
Oral presentation in Efficient water resources management in Cr(VI) impacted water bodies
[CEST2019_00640] Harmonization of sampling and chemical analysis for the study of Cr(VI) water contamination in aquifers of eastern Mediterranean and Oman- the CrITERIA project experience
by Argyraki A., Kelepertzis E., Pyrgaki K., Botsou F., Megremi I., Dermatas D.

The CrITERIA project aims to deliver a harmonized data base, to assist water resource management organizations and water users on decision making when coping with water scarcity, climate extreme events and contaminated water. Contamination by Cr(VI) is used as an example of a specific water pressure problem that has to be tackled. Comparative, collaborative research using real situation data from case study areas in each of the participating countries was the base of our methodology.

Session: 14, Room: B, at Thu, 09/05/2019 - 16:00 to 16:15
Oral presentation in Efficient water resources management in Cr(VI) impacted water bodies
[CEST2019_00622] A DPSIR Approach To Selected Cr(VI) Impacted Groundwater Bodies Within Attica and Eastern Sterea Ellada River Basin Districts
by Pyrgakı K., Argyrakı A., Kelepertzis S., Botsou F. Megremi I., Karavoltsos S., Mpouras T., Dassenakis E., Hatzaki M., Dermatas D.

The holistic approach of the Driver-Pressure-State-Impact-Response (DPSIR) analytical framework in combination with Geographical Information Systems was applied to selected Cr(VI) impacted groundwater bodies. For the characterization of water-quality “state” 157 samples including field blanks were collected during the wet and dry seasons of 2017 and 2018 and several physicochemical parameters were determined. In Loutraki area, Cr(VI) in groundwater ranged from 12 to 62 μg/L while NO3 and Cl maximum values were 157mg/L and 218mg/L respectively.

Session: 14, Room: B, at Thu, 09/05/2019 - 15:45 to 16:00
Oral presentation in Efficient water resources management in Cr(VI) impacted water bodies
[CEST2019_00576] Preliminary study on Cr-rich groundwater treatment by membrane processes
by Fuoco I., Figoli A., Brozzo G., De Rosa R., Bloise A., Criscuoli A., Apollaro C.

The aim of this work is to treat chromium (Cr)-rich groundwaters through membrane processes as alternative to conventional methods. Commonly, the highest Cr (VI) concentrations into groundwater are detected in ophiolitic areas due to water-serpentinite interaction processes. In this work, the water sample treated comes from Bonassola serpentinitic aquifer (La Spezia, Liguria, Italy), in which a Cr(VI) concentration of 84 μg/l was detected.

Session: 14, Room: B, at Thu, 09/05/2019 - 16:33 to 16:36
Flash presentation in Efficient water resources management in Cr(VI) impacted water bodies
[CEST2019_00581] Synthesis of kaolin supported nZVI and evaluation for the removal of Cr(VI) and Ni from waste streams
by Toli A., Mystrioti C., Della A., Thymi S., Papassiopi N.

This study involved the synthesis of kaolin-supported nano zero valent iron (K-nZVI) and the evaluation of its performance for the removal of chromates and nickel from contaminated waters. K-nZVI was prepared by mixing a kaolin sample with a FeCl3 solution, followed by the addition of sodium borohydride for the reduction of Fe(III) to the zero valent state. The effectiveness of kaolin supported nZVI for Cr(VI) and Ni removal was evaluated by conducting batch experiments.

Session: 14, Room: B, at Thu, 09/05/2019 - 15:30 to 15:45
Oral presentation in Efficient water resources management in Cr(VI) impacted water bodies
[CEST2019_00594] Geogenic Cr(VI) in groundwater of the Pollino Massif (southern Apennines): occurrence and remediation.
by Paternoster M., Rizzo G., Sinisi R., Vilardi G., Di Palma L., Mongelli G.

In this study total Cr, Cr(VI), Ni, major and some trace elements were determined in groundwater of northern sector of the Pollino Massif. The investigated area is characterized by ophiolitic rocks consisting of metabasites and cataclastic and highly fractured serpentinites. Two different hydro-facies were observed, reflecting low-temperature water-rock interactions. The Mg-HCO3 hydrofacies was determined through the weathering of serpentinites, the Ca-HCO3 groundwater are due to the interaction with calcschist and metabasites.

Session: 14, Room: B, at Thu, 09/05/2019 - 16:36 to 16:39
Flash presentation in Efficient water resources management in Cr(VI) impacted water bodies
[CEST2019_00538] Stakeholder Participation in Prioritization of Water Supply and Demand in Jordan
by Shammout M.W., Shatanawi M.

Stakeholder participation in prioritization of water supply and demand was developed to assist water resource entities and water users on decision making when coping with water scarcity, climate change and contaminated water in Zarqa River Basin, Jordan. The basin was selected for CrITERIA project to represent a case study of semi-arid area in the Mediterranean. The paper demonstrates a participatory approach of integrating stakeholders’ experience and their active involvement in water management.

Session: 14, Room: B, at Thu, 09/05/2019 - 15:15 to 15:30
Oral presentation in Efficient water resources management in Cr(VI) impacted water bodies
[CEST2019_00469] Occurrence and distribution of hexavalent chromium in ground and surface waters in Cyprus under the CrITERIA project
by Zissimos A., Christofi C., Christoforou I., Rigas M.

The origin and distribution of hexavalent chromium, Cr (VI) over four seasonal cycles was investigated through a conceptual model that included three aquifer systems in Cyprus. An extensive water sampling grid covered two sea water intruded coastal aquifers, namely the Kokkinochoria (A1) and Kiti-Pervolia (A2) aquifers and the Troodos massif (A3). Analytical results give a first insight to the presence of Cr (VI). Areas A1 and A2 exhibit high conductivity and nitrate concentrations (due to NPK fertilisers and seawater intrusion).

Session: 14, Room: B, at Thu, 09/05/2019 - 16:30 to 16:33
Flash presentation in Efficient water resources management in Cr(VI) impacted water bodies
[CEST2019_00449] CrVI contaminated groundwater in the Mediterranean: Case study from Mersin, Turkey
by Hatipoglu-Bagci Z., Bayari C.S., Canakci A.

Increasing population, industrialization, agricultural and tourism activities in Mediterranean countries do not only increase the water demand but also led to deterioration of water quality. Water quality degradation is a common problem in all circum-Mediterranean countries and there is an increasing need for the development of a common approach in tackling water resources management problems. ERANETMED CrITERIA project aims to assist the water resources management organizations with an optimization tool that includes documentation and database for decision support.

Session: 14, Room: B, at Thu, 09/05/2019 - 15:00 to 15:15
Oral presentation in Efficient water resources management in Cr(VI) impacted water bodies