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Enhancing the Adsorption of Lead (II) by Bentonite Enriched with pH-Adjusted Meranti Sawdust

Department of Soil and Physical Science, Soil and Environmental Research, Lincoln University, Lincoln 7647, New Zealand
School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Penang, Malaysia
Author to whom correspondence should be addressed.
Water 2018, 10(12), 1875;
Received: 31 October 2018 / Revised: 25 November 2018 / Accepted: 11 December 2018 / Published: 18 December 2018
(This article belongs to the Section Water and Wastewater Treatment)
PDF [3663 KB, uploaded 18 December 2018]


In recent years, the need for a safe and modern composite barrier for the prevention of groundwater contamination and the provision of geo-environmental protection has been studied together with the need of designing a low-cost and effective liner for isolating landfill contents from the environment. In this study, various mix designs involving two natural adsorbents, Na-bentonite the pH-adjusted sawdust, were prepared for a series of geo-environmental experiments to be carried out to determine the adsorption capacity, buffering capacity, pH changes, and Chemical Oxygen Demand (COD) changes among others, in the presence of Pb(NO3)2 contaminant concentrations. Generally, the results showed an increase in adsorption capacity in the acidic segment of the treatment. An increase of 58% of the adsorption efficiency of the Na-bentonite in adsorbing the contaminant at the highest concentration was the most important achievement of the system while in the acidic segment. View Full-Text
Keywords: bentonite; sawdust; chemically treatment; heavy metal; adsorption capacity bentonite; sawdust; chemically treatment; heavy metal; adsorption capacity

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Mohajeri, P.; Smith, C.; Selamat, M.R.; Abdul Aziz, H. Enhancing the Adsorption of Lead (II) by Bentonite Enriched with pH-Adjusted Meranti Sawdust. Water 2018, 10, 1875.

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