Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat
Landfills are a potential threat to human health and the environment, especially from the detrimental and toxic heavy metals. This study focuses on the assessment of heavy metals contamination in leachate and surface soils from different landfills in Malaysia. Maximum quality rating scale (QRS) valu...
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2021
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2-s2.0-85096135103 Hussein M.; Yoneda K.; Mohd-Zaki Z.; Amir A.; Othman N.Á. Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat 2021 Chemosphere 267 10.1016/j.chemosphere.2020.128874 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096135103&doi=10.1016%2fj.chemosphere.2020.128874&partnerID=40&md5=1dd7f6cf52c72c7d15b255362e23129a Landfills are a potential threat to human health and the environment, especially from the detrimental and toxic heavy metals. This study focuses on the assessment of heavy metals contamination in leachate and surface soils from different landfills in Malaysia. Maximum quality rating scale (QRS) values of As (787) and Cr (552) denotes progressive deterioration of leachate contamination in landfill. The impacted soils showed high heavy metal concentrations especially at non-sanitary unlined landfills, as compared to background values, and natural soil nearby the landfills. In addition, to examine the environmental impacts of the landfill area (soil) in more detail, specific indexes; geo-accumulation index (Igeo), pollution index (PI) and integrated pollution index (IPI) were determined. Maximum As (3.122) and Cd (2.633) for Igeo and As (34.037) and Cd (20.881) for PI revealed that the soil samples in non-sanitary landfills were moderate to strongly polluted. The difference in range of IPI values for sanitary (0.294–0.322) and non-sanitary landfill soils (1.263–1.956) confirmed advanced decline of the soil quality in non-sanitary landfills. Arsenic concentrations were found to be statistically significant (ANOVA) for leachate and impacted soil in landfills investigated. It is also important to realize that rise in metal contents in landfill environments were not only caused by anthropogenic sources such as from the waste disposed, but also some other factors such as redox conditions, anoxic environments, pH, oxidation state of metals and microbial activities. Those conditions will actively promotes leaching of metals from waste and also natural soils in the landfill. © 2020 Elsevier Ltd Elsevier Ltd 456535 English Article |
author |
Hussein M.; Yoneda K.; Mohd-Zaki Z.; Amir A.; Othman N.Á. |
spellingShingle |
Hussein M.; Yoneda K.; Mohd-Zaki Z.; Amir A.; Othman N.Á. Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat |
author_facet |
Hussein M.; Yoneda K.; Mohd-Zaki Z.; Amir A.; Othman N.Á. |
author_sort |
Hussein M.; Yoneda K.; Mohd-Zaki Z.; Amir A.; Othman N.Á. |
title |
Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat |
title_short |
Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat |
title_full |
Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat |
title_fullStr |
Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat |
title_full_unstemmed |
Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat |
title_sort |
Heavy metals in leachate, impacted soils and natural soils of different landfills in Malaysia: An alarming threat |
publishDate |
2021 |
container_title |
Chemosphere |
container_volume |
267 |
container_issue |
|
doi_str_mv |
10.1016/j.chemosphere.2020.128874 |
url |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096135103&doi=10.1016%2fj.chemosphere.2020.128874&partnerID=40&md5=1dd7f6cf52c72c7d15b255362e23129a |
description |
Landfills are a potential threat to human health and the environment, especially from the detrimental and toxic heavy metals. This study focuses on the assessment of heavy metals contamination in leachate and surface soils from different landfills in Malaysia. Maximum quality rating scale (QRS) values of As (787) and Cr (552) denotes progressive deterioration of leachate contamination in landfill. The impacted soils showed high heavy metal concentrations especially at non-sanitary unlined landfills, as compared to background values, and natural soil nearby the landfills. In addition, to examine the environmental impacts of the landfill area (soil) in more detail, specific indexes; geo-accumulation index (Igeo), pollution index (PI) and integrated pollution index (IPI) were determined. Maximum As (3.122) and Cd (2.633) for Igeo and As (34.037) and Cd (20.881) for PI revealed that the soil samples in non-sanitary landfills were moderate to strongly polluted. The difference in range of IPI values for sanitary (0.294–0.322) and non-sanitary landfill soils (1.263–1.956) confirmed advanced decline of the soil quality in non-sanitary landfills. Arsenic concentrations were found to be statistically significant (ANOVA) for leachate and impacted soil in landfills investigated. It is also important to realize that rise in metal contents in landfill environments were not only caused by anthropogenic sources such as from the waste disposed, but also some other factors such as redox conditions, anoxic environments, pH, oxidation state of metals and microbial activities. Those conditions will actively promotes leaching of metals from waste and also natural soils in the landfill. © 2020 Elsevier Ltd |
publisher |
Elsevier Ltd |
issn |
456535 |
language |
English |
format |
Article |
accesstype |
|
record_format |
scopus |
collection |
Scopus |
_version_ |
1809677597015015424 |