Abstract
Despite of over 25 years of intensive technological efforts, sub-surface environment cleanup still remains a challenge, especially in case of highly contaminated sites. In this context, ion exchanger technologies could provide simple and effective solutions for heavy metal removal in water treatment. The challenge is finding exchanger able to operate in extreme natural environments or in situations involving natural interfering species such as inorganic ions. In this paper we exam the use of natural zeolites as versatile exchanger for environmental protection of coastal refinery's groundwater against pollution of Ni, Cd, Pb. The influence of particle diameter on clinoptilolite performances toward heavy metal removal is studied. Also, we evaluate the exchanger activities in condition of high ionic strength, commonly present in groundwater located under coastal petrol industries. The obtained results confirmed that ion exchangers could provide an effective solutions for remediation in complex environmental conditions.
Highlights
In a worldwide context where in some areas of the earth the lack of drinkable and irrigation water is endemic, it is necessary the recovery and remediation of petrochemical contaminated waters, to not impoverish global water resources
We evaluate the exchanger activities in condition of high ionic strength, commonly present in groundwater located under coastal petrol industries
The obtained results confirmed that ion exchangers could provide an effective solutions for remediation in complex environmental conditions
Summary
In a worldwide context where in some areas of the earth the lack of drinkable and irrigation water is endemic, it is necessary the recovery and remediation of petrochemical contaminated waters, to not impoverish global water resources The pollution of these waters doesn’t involve only high concentrations of organic compounds and the presence of heavy metals, that, even if at trace levels, determines residual concentrations above the allowed limits. In this work we consider kinetic and thermodynamic aspects of the adsorption of Pb2+,Cd2+ and Ni2+ on natural materials such as clinoptilolite These elements are present at trace levels in crude oil (Uzoekwe and Oghosanine, 2011) and are toxic for human people and environment too. The influence of the clinoptilolite particle sizes on both the adsorption rate and the maximum absorbable amount is studied
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