Title: PERSPEC Perspectives on mobilisation of prioritised contaminants in soil 
Resource Type: document --> technical publication --> report 
Country: EU Projects 
Language(s): English
 
Year: 2017 
Author 1/Producer: PERSPEC Consortium 
Author / Producer Type: EC Project 
Report/Document number/description: Final Project Report. European Commission’s 6th Framework Programme project SNOWMAN (contract no ERAC-CT-2003-003219). 
Publisher Country: EU Projects 
Publisher web link (root): http://snowmannetwork.com
Report / download web link (=direct link): http://snowmannetwork.com/?page_id=371  
EUGRIS Keyword(s): Contaminated land-->Contaminants-->Heavy metals
Contaminated land-->Soil and groundwater processes-->Contaminant hydrology
Contaminated land-->Soil and groundwater processes-->Geochemistry
Contaminated land-->Soil and groundwater processes-->Hydrogeology
Contaminated land-->Soil and groundwater processes-->Soil and groundwater processes overview
Soil-->Processes
Water resources and their management -->Monitoring and mitigation
Water resources and their management -->Water resources and their management Overview
 
Short description: As part of the PERSPEC project, levels of HOCs in surface water along the water path from Krycklan to the Gulf of Bothnia were measured and preliminary results are given in this report. The results varied depending on if the concentrations were calculated as amount per water volume or if the values were normalised to the amount of organic carbon present in the water (pg/g OC), once again underlining the importance of organic carbon. Nonetheless, the results show that atmospherically derived diffuse pollution has an impact in addition to downstream point sources. The data from Krycklan was also modelled with various state-of-the-art models in an attempt to describe the fluxes of contaminants and the processes that regulate these fluxes within the studied catchment and water path. The results from the modelling of HOCs were used to estimate total atmospheric inputs for each season, compare HOC exports for the different seasons and different catchment types (forested / mire), compare exports to total soil inventory, calculate relative contribution of snowmelt to total HOC exports, quantify the role of the spring flood in delivering HOCs to the Krycklan catchment, and estimate the influence of enhanced soil contamination on export of HOCs to the stream. The modelling of metals was focused on comparing two different approaches: WITCH and PHAST. The WITCH code is a geochemical model that allows calculations of soil solution composition and mass balance calculations of elements in different soil compartments based on a series of parallel reactions of dissolution, plant uptake and precipitation. PHAST is a multi-box model that allows hydrology to be connected to both thermodynamic and empirical kinetic rate laws. This permits a more flexible model structure and varying depth in model complexity. In summary, the presented data shows that although metals, trace elements and HOCs are governed by significantly different chemical properties, they are subject to the same soil - water controlled processes, such as interaction with organic matter (OM) and dissolved organic carbon (DOC), and this has a considerable impact on their environmental fate. The PERSPEC project also serves as a great example on how an interdisciplinary approach where hydrology, soil science, and organic and inorganic environmental chemistry working in tandem contributes significantly to the fundamental understanding of pollution mobility  
Link to Project(s): PERSPEC Perspectives on mobilisation of prioritised contaminants in soil
 
Submitted By: Professor Paul Bardos WhoDoesWhat?      Last update: 29/11/2017

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