Spatial mapping and modelling of heavy metals and xenobiotics in - - PowerPoint PPT Presentation

Kwame Nkrumah University of Science & Technology, Kumasi, Ghana

Spatial mapping and modelling

• f heavy metals and

xenobiotics in Ghana

Lily Lisa Yevugah

Geomatic Engineering Department A PhD Student on the SHEATHE Project

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Introduction

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• Heavy metals are rated amongst the most dangerous

groups of environmental pollutants. Examples: Hg, Cd,Cr,Cu,Pb,Mg,Ni,Sn,Zn,As,Sb

• Two major contributors to environmental pollution.

– Industrialization – Urbanization

• Two major sources of heavy metals

– Artisanal Small Scale Mining (ASM) and – Waste Electrical and Electronic Equipment (WEEE).

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Introduction

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• About 650 – 1000 tons of mercury is released yearly into the

atmosphere (UNEP, 2013).

• About 20 - 50 million tons of e-waste is generated yearly

(UNEP, 2005) of which Ghana is one of the destination sites for its recycling.

• Ghana receives about 215,000 tons e-waste (Amoyaw Osei

et al., 2011).

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Agbogbloshie E- waste site

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Galamsey Site at Manso

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Problem Statement

• The ASM and WEEE contributes to heavy metals and xenobiotics in

the environment.

• Heavy metals are non degradable and they pose serious health risk

to exposed individuals and plants.

• Some

works have been done in assessing the extent

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contamination in the environment but no work has been done to cover the entire country.

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Aim

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• The aim of this research is to measure and

determine the dispersal of heavy metals and xenobiotics in Ghana.

– Soil and Air

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Objectives

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• To measure and analyze concentration of heavy metals

in the soil and air.

• To measure and analyze concentration of xenobiotics in

the soil and air.

• To determine Land Use Land Cover Change (LULCC)

map of Ghana (1987 – 2017).

• To determine the spatial distribution of heavy metals

and xenobiotics.

• To set up models of dispersal of contaminants in the

soil and air.

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Knowledge Gap

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• To provide a background information on

the extent of contamination in soil and air for the entire country for future works.

• To provide new knowledge on dispersal

and effect of heavy metals and xenobiotics substances in the soil and air.

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Study Area

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Expected Output

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Materials

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Software

• ArcGIS Suite
• Google Earth
• Google Earth Engine
• GLEMOS
• IDMM

Equipment

• Lumex Mercury Analyzer
• UAV (Drone): Sabre HL48 Skyhorse
• GPS Receiver
• Passive Samplers
• Nixon XRF Analyzer

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Equipment and Method

Sabre HL48 Skyhorse Lumex Mercury Analyzer

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Equipment and Method

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Equipment and Method

GFAAS Mercury Analyzer Passive Air Sampler

McLagan et al, 2016

XRF

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Expected Output

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Land Use Land Cover Change (LULCC)

1987 1997 2007 2017 1987- 1997 1997-2007 2007-2017

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Models

IDMM

GLEMOS

Soil Air

MODEL AND SIMULATION MODEL AND SIMULATION

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Expected Outcome

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• Background concentration of heavy metals

and xenobiotic in Ghana.

• Spatial distribution of heavy metals and

xenobiotics.

• LULCC of Ghana.
• Models on contamination of heavy metals

and xenobiotics.

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Thank You!

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Resources Available

• KNUST Library
• KNUST Central laboratories
• Chemistry Department, KNUST
• Aarhus University- Denmark
• Geomatic Engineering Department, KNUST