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منتدى علوم البيئة / بحث يدل على استخدام النبات في معالجة الرصاص
« في: ديسمبر 19, 2007, 12:46:50 صباحاً »
بسم الله الرحمن الرحيم
كل عام وانتم بخير
اليكم هذا البحث عن استخدام النبات في ازالة الرصاص من الماء.
هبة منير
Removal of lead from aqueous solutions using an immobilized
biomaterial derived from a plant biomass
K. Chandra Sekhar a,∗, C.T. Kamalaa, N.S. Chary a, A.R.K. Sastry b,
T. Nageswara Raoa, M. Vairamani a
a Analytical Chemistry and Environmental Sciences Division, Discovery Lab (D-120), Indian Institute of Chemical Technology, Hyderabad 500 007, AP, India
b Organic Coatings and Polymers Division, Indian Institute of Chemical Technology, Hyderabad 500 007, AP, India
Received 26 August 2003; received in revised form 29 January 2004; accepted 29 January 2004
Abstract
Because of the severity of heavy metal contamination and potential adverse health impact on the public, a tremendous effort has taken place
to purify waters containing toxic metal ions. Traditional methods which have been employed prove to be costly and prohibitive for low level
waste remediation. Biosorption is presented as an alternative to traditional physicochemical means for removing toxic metals from ground
and wastewaters. Most recently, plant based biomaterials have been of interest.
The bark of Hemidesmus indicus, an extensively available plant biomass commonly called as Indian sarsaparilla was used as biomaterial
for removal of lead from aqueous streams. Batch experiments were carried out with immobilized biomass of H. indicus (IPBFIX) to optimize
the experimental parameters like effect of contact time, initial metal concentration, initial IPBFIX concentration and co-metal ion effect
on biosorption of lead from contaminated waters. Column experiments were performed under flow conditions for regeneration and recycle
efficiency of IPBFIX and was found to be effective for three cycles. Elution experiments were carried out to remove lead ions from loaded
IPBFIX and 100% elution was achieved with a 0.1M HNO3 solution. The effectiveness of the IPBFIX for biosorption of lead ions was
demonstrated using the wastewater samples emanating from a non-ferrous metal industry and the results are presented in this paper. The
results from these studies will be useful for a novel phytofiltration technology to remove and recover lead from wastewaters and this can also
be well adapted for secondary treatment or polishing of wastewaters. An attempt has been made to remove lead from the lead polluted waters
(both ground and surface) from an industrially contaminated sites.
© 2004 Elsevier B.V. All rights reserved.
Keywords: Lead; Immobilization; Biomass; Beads; Phytofiltration; Regeneration
كل عام وانتم بخير
اليكم هذا البحث عن استخدام النبات في ازالة الرصاص من الماء.
هبة منير
Removal of lead from aqueous solutions using an immobilized
biomaterial derived from a plant biomass
K. Chandra Sekhar a,∗, C.T. Kamalaa, N.S. Chary a, A.R.K. Sastry b,
T. Nageswara Raoa, M. Vairamani a
a Analytical Chemistry and Environmental Sciences Division, Discovery Lab (D-120), Indian Institute of Chemical Technology, Hyderabad 500 007, AP, India
b Organic Coatings and Polymers Division, Indian Institute of Chemical Technology, Hyderabad 500 007, AP, India
Received 26 August 2003; received in revised form 29 January 2004; accepted 29 January 2004
Abstract
Because of the severity of heavy metal contamination and potential adverse health impact on the public, a tremendous effort has taken place
to purify waters containing toxic metal ions. Traditional methods which have been employed prove to be costly and prohibitive for low level
waste remediation. Biosorption is presented as an alternative to traditional physicochemical means for removing toxic metals from ground
and wastewaters. Most recently, plant based biomaterials have been of interest.
The bark of Hemidesmus indicus, an extensively available plant biomass commonly called as Indian sarsaparilla was used as biomaterial
for removal of lead from aqueous streams. Batch experiments were carried out with immobilized biomass of H. indicus (IPBFIX) to optimize
the experimental parameters like effect of contact time, initial metal concentration, initial IPBFIX concentration and co-metal ion effect
on biosorption of lead from contaminated waters. Column experiments were performed under flow conditions for regeneration and recycle
efficiency of IPBFIX and was found to be effective for three cycles. Elution experiments were carried out to remove lead ions from loaded
IPBFIX and 100% elution was achieved with a 0.1M HNO3 solution. The effectiveness of the IPBFIX for biosorption of lead ions was
demonstrated using the wastewater samples emanating from a non-ferrous metal industry and the results are presented in this paper. The
results from these studies will be useful for a novel phytofiltration technology to remove and recover lead from wastewaters and this can also
be well adapted for secondary treatment or polishing of wastewaters. An attempt has been made to remove lead from the lead polluted waters
(both ground and surface) from an industrially contaminated sites.
© 2004 Elsevier B.V. All rights reserved.
Keywords: Lead; Immobilization; Biomass; Beads; Phytofiltration; Regeneration