Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review

The drawbacks associated with activated carbon, mainly cost, have resulted in the continuing search for inexpensive adsorbents easily and abundantly available as waste materials. The current review presents the results of using different forms of date palm (DP) waste as low-cost biosorbents, highlig...

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Main Authors:	M. Shafiq, Alazba, A.A., Amin, M.T.
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2018
Online Access:	http://journalarticle.ukm.my/11978/ http://journalarticle.ukm.my/11978/ http://journalarticle.ukm.my/11978/1/05%20M.%20Shafiq.pdf

id	ukm-11978
recordtype	eprints
spelling	ukm-119782018-08-17T08:51:27Z http://journalarticle.ukm.my/11978/ Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review M. Shafiq, Alazba, A.A. Amin, M.T. The drawbacks associated with activated carbon, mainly cost, have resulted in the continuing search for inexpensive adsorbents easily and abundantly available as waste materials. The current review presents the results of using different forms of date palm (DP) waste as low-cost biosorbents, highlighting effects of contact time, pH, the dose and size of the adsorbent particles, initial metal concentrations and the effects of pre-treatment on the adsorption efficiency of copper (Cu2+). The results of studies using the raw DP trunk fiber suggested the equilibrium time was approximately 2 h, with a significantly high removal of Cu2+ during the initial 1 h at acidic pH values of 5-6, which indicated the interference of H+ ions with metal ions at low pH values. The raw DP trunk fiber was tested with initial particle sizes of 75-251 μm and adsorbent dosages in the range of 0.4-5.0 g L-1. The best adsorption efficiency was obtained at the smallest particle size and the maximum dosage. The use of different initial Cu2+ concentrations resulted in a 10% decrease in removal, but the adsorption capacity was increased three-fold with an initial concentration of 20-100 mg L-1. A significantly higher removal efficiency of Cu2+ was achieved using the modified DP waste than with the raw trunk fiber for all experimental parameters and operational conditions owing to the increased functional groups on the modified adsorbents. The reviewed literature confirmed the efficiency of DP waste for the adsorption of heavy metals, but the use of the raw or even modified DP waste for the large-scale treatment of wastewater is still a concern owing to the cost effectiveness, availability and requirement for DP waste on a massive scale. Further research for physical modifications of the raw DP waste that employs cost-effective techniques, such as using the DP waste in the form of dehydrated carbon and media filters are required. Penerbit Universiti Kebangsaan Malaysia 2018-01 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/11978/1/05%20M.%20Shafiq.pdf M. Shafiq, and Alazba, A.A. and Amin, M.T. (2018) Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review. Sains Malaysiana, 47 (1). pp. 35-49. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol47num1_2018/contentsVol47num1_2018.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	The drawbacks associated with activated carbon, mainly cost, have resulted in the continuing search for inexpensive adsorbents easily and abundantly available as waste materials. The current review presents the results of using different forms of date palm (DP) waste as low-cost biosorbents, highlighting effects of contact time, pH, the dose and size of the adsorbent particles, initial metal concentrations and the effects of pre-treatment on the adsorption efficiency of copper (Cu2+). The results of studies using the raw DP trunk fiber suggested the equilibrium time was approximately 2 h, with a significantly high removal of Cu2+ during the initial 1 h at acidic pH values of 5-6, which indicated the interference of H+ ions with metal ions at low pH values. The raw DP trunk fiber was tested with initial particle sizes of 75-251 μm and adsorbent dosages in the range of 0.4-5.0 g L-1. The best adsorption efficiency was obtained at the smallest particle size and the maximum dosage. The use of different initial Cu2+ concentrations resulted in a 10% decrease in removal, but the adsorption capacity was increased three-fold with an initial concentration of 20-100 mg L-1. A significantly higher removal efficiency of Cu2+ was achieved using the modified DP waste than with the raw trunk fiber for all experimental parameters and operational conditions owing to the increased functional groups on the modified adsorbents. The reviewed literature confirmed the efficiency of DP waste for the adsorption of heavy metals, but the use of the raw or even modified DP waste for the large-scale treatment of wastewater is still a concern owing to the cost effectiveness, availability and requirement for DP waste on a massive scale. Further research for physical modifications of the raw DP waste that employs cost-effective techniques, such as using the DP waste in the form of dehydrated carbon and media filters are required.
format	Article
author	M. Shafiq, Alazba, A.A. Amin, M.T.
spellingShingle	M. Shafiq, Alazba, A.A. Amin, M.T. Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review
author_facet	M. Shafiq, Alazba, A.A. Amin, M.T.
author_sort	M. Shafiq,
title	Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review
title_short	Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review
title_full	Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review
title_fullStr	Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review
title_full_unstemmed	Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review
title_sort	removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2018
url	http://journalarticle.ukm.my/11978/ http://journalarticle.ukm.my/11978/ http://journalarticle.ukm.my/11978/1/05%20M.%20Shafiq.pdf
first_indexed	2023-09-18T20:01:35Z
last_indexed	2023-09-18T20:01:35Z
_version_	1777406883962814464

Removal of heavy metals from wastewater using date palm as a biosorbent: a comparative review

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