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- 저자 : M. Mokhlesur Rahman (검색결과 9 건)
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( M. Uddin Nizam ),( M. Wahid U Zzaman ),( M. Mokhlesur Rahman ),( Jang Eok Kim ) 한국환경농학회 2016 한국환경농학회지 Vol.35 No.2
BACKGROUND: Arsenic (As)-contaminated groundwater used for long-term irrigation has emerged as a serious problem by adding As to soils. Phytoremediation potential of fiber crops viz., kenaf (Hibiscus cannabinus L.), mesta (Hibiscus sabdariffa L.), and jute (Corchorus capsularis L.) was studied to clean up As-contaminated soil. METHODS AND RESULTS: Varieties of three fiber crops were selected in this study. Seeds of kenaf, mesta, and jute varieties were germinated in As-contaminated soil. Uptake of As by shoot was significantly higher than that by root in the contaminated soil. In As-contaminated soil, kenaf and mesta varieties accumulated more As, than did jute varieties. In the plant parts above ground, mainly the shoots, the highest As absorption was recorded in kenaf cv. HC-3, followed by kenaf cv. HC-95. Kenaf varieties produced more biomass. In terms of higher plant biomass production, and As absorption, kenaf varieties showed considerable potential to remediate As-contaminated soil. CONCLUSION: The overall As absorption and phytoremediation potentiality of plant varieties were in the order of kenaf cv. HC-3 > kenaf cv. HC-95 > mesta cv. Samu-93 > jute cv. CVE-3 > jute cv. BJC-7370. All varieties of kenaf, mesta, and jute could be considered for an appropriate green plant-based remediation technology in As-contaminated soil.
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Appraisal of heavy metal status in water for irrigation usage of the Bangshi River, Bangladesh
M. Taufique Arefin,M. Mokhlesur Rahman,M. Wahid-U-Zzaman,김장억 한국응용생명화학회 2016 Applied Biological Chemistry (Appl Biol Chem) Vol.59 No.5
An attempt was made to assess the status of heavy metals in the Bangshi River water for irrigation usage. River water was sampled from 20 sampling points for chemical analysis of physicochemical parameters and metal ions. Our analyses revealed that water samples were slightly alkaline to alkaline. All samples had reasonable electrical conductivity, and these samples were from low to medium salinity classes as being fit for irrigation on soils having moderate level of permeability. Water samples were categorized freshwater as per total dissolved solids (TDS). All water samples were excellent indicating low alkalinity hazard, based on sodium adsorption ratio (SAR), but most of the samples were doubtful to unsuitable for soluble sodium percentage (SSP). All samples were free from residual sodium carbonate (RSC) suggesting suitability for irrigation purpose. For water hardness, samples were rated as moderately hard, hard, and very hard. The status of Fe, Zn, Pb, Cd, and Ni in water samples were within permissible levels but Cr, Cu, and Mn content in water samples were in excess of recommended limits and these ions would be considered toxic in long-term irrigation system. Significant relationships existed between EC versus TDS, SAR versus SSP, SSP versus RSC, and SAR versus RSC. There were significant correlations between metal ions: Fe–Cu, Fe–Pb, Cu–Pb, Fe–Mn, Cu–Mn, and Mn–Pb. This finding showed that Cr, Cu, and Mn ions were considered contaminants in river water used for irrigation because the present status of these metals may pose a harmful impact on human health.
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( M. Mokhlesur Rahman ),( Jung-in Hwang ),( Se-yeon Kwak ),( Jang-eok Kim ) 한국응용생명화학회 2018 Journal of Applied Biological Chemistry (J. Appl. Vol.61 No.4
Degradation of the insecticide O,O-diethyl O-3,5,6- trichloro-2-pyridyl phosphorothioate (chlorpyrifos) in aqueous solution was investigated using iron salts and potassium persulfate during ZVI treatment through a series of batch experiments. The degradation rate of chlorpyrifos increased with increases in the concentrations of iron salts and potassium persulfate in the aqueous system. Ferric chloride was found to be the most effective iron salt for the ZVI-mediated degradation of chlorpyrifos in aqueous solution. Further, the iron salts tested could be arranged in the following order in terms of their effectiveness: FeCl<sub>3</sub>> Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>>Fe(NO<sub>3</sub>)<sub>3</sub>. The persulfate-ZVI system could significantly degrade chlorpyrifos present in the aqueous medium. This revealed that chlorpyrifos degradation by treatment with Fe<sup>0</sup> was promoted on adding ferric chloride and potassium persulfate. The kinetics of the degradation of chlorpyrifos by persulfate-amended Fe<sup>0</sup> was higher than that for iron-salt-amended Fe<sup>0</sup>. This suggests that using a sequential Fe<sup>0</sup> reduction-ferric chloride or Fe<sup>0</sup> reduction-persulfate process may be an effective strategy to enhance the removal of chlorpyrifos in contaminated water.
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Appraisal of heavy metal status in water for irrigation usage of the Bangshi River, Bangladesh
Arefin, M. Taufique,Rahman, M. Mokhlesur,Wahid-U-Zzaman, M.,Kim, Jang-Eok The Korean Society for Applied Biological Chemistr 2016 Applied Biological Chemistry (Appl Biol Chem) Vol.59 No.5
An attempt was made to assess the status of heavy metals in the Bangshi River water for irrigation usage. River water was sampled from 20 sampling points for chemical analysis of physicochemical parameters and metal ions. Our analyses revealed that water samples were slightly alkaline to alkaline. All samples had reasonable electrical conductivity, and these samples were from low to medium salinity classes as being fit for irrigation on soils having moderate level of permeability. Water samples were categorized freshwater as per total dissolved solids (TDS). All water samples were excellent indicating low alkalinity hazard, based on sodium adsorption ratio (SAR), but most of the samples were doubtful to unsuitable for soluble sodium percentage (SSP). All samples were free from residual sodium carbonate (RSC) suggesting suitability for irrigation purpose. For water hardness, samples were rated as moderately hard, hard, and very hard. The status of Fe, Zn, Pb, Cd, and Ni in water samples were within permissible levels but Cr, Cu, and Mn content in water samples were in excess of recommended limits and these ions would be considered toxic in long-term irrigation system. Significant relationships existed between EC versus TDS, SAR versus SSP, SSP versus RSC, and SAR versus RSC. There were significant correlations between metal ions: Fe-Cu, Fe-Pb, Cu-Pb, Fe-Mn, Cu-Mn, and Mn-Pb. This finding showed that Cr, Cu, and Mn ions were considered contaminants in river water used for irrigation because the present status of these metals may pose a harmful impact on human health.
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03 구두발표 : 구두발표(OC) - 농업화학 및 생태,식품분야 ; OC-02 : 비소 오염토양의 복원을 위한 Kenaf, Mesta 및 Jute의 응용
모클레수르라만 ( M. Mokhlesur Rahman ),우딘니잠 ( M. Uddin Nizam ),와히드-우-자만 ( M. Wahid-u-zzaman ),김장억 ( Jang Eok Kim ) 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
In an attempt to clean up arsenic (As)-contaminated soil, phytoremediation potential of kenaf (Hibiscus cannabinus L. cvs. HC-95 and HC-3), mesta (Hibiscus sabdariffa L. cv. Samu-93), and jute (Corchorus capsularis L. cvs. BJC-7370 and CVE-3) was studied. In the present study, seeds of kenaf, mesta, and jute were germinated in As-contaminated soil. Kenaf varieties viz., HC-3 and HC-95 produced more biomass, as compared to other varieties of mesta and jute. Uptake of As by shoot was significantly higher than that by root in both As-contaminated and uncontaminated soils. The higher the content of As in soil, the higher was its absorption by both shoot and root. In the As-contaminated soil, kenaf and mesta varieties accumulated more As, than did jute varieties. In the plant parts above ground, mainly the shoots, the highest As absorption (52.29 mg pot-1) was recorded in kenaf cv. HC-3, followed by kenaf cv. HC-95 (32.12 mg pot-1). In terms of higher plant biomass production, and As absorption, kenaf varieties viz., HC-3 and HC-95 showed considerable potential to remediate As-contaminated soil. Enrichment factor (EF) values of As in roots and shoots of the plant species, indicated the accumulation of As in plant parts from the contaminated soil. Bioconcentration factor (BCF) values categorized all varieties of kenaf, mesta, and jute as As accumulators. With respect to translocation factor (TF) values, As was slowly translocated from root to shoot in kenaf, mesta, and jute plants. The overall As absorption and phytoremediation potentiality of plant varieties were kenaf cv. HC-3 > kenaf cv. HC-95 > mesta cv. Samu-93 > jute cv. CVE-3 > jute cv. BJC- 7370. All the varieties of kenaf, mesta, and jute are cultivated as fiber crops, and could be considered for an appropriate income-generating green plant-based remediation technology for As-contaminated soil.
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Uddin Nizam, M.,Wahid-U-Zzaman, M.,Mokhlesur Rahman, M.,Kim, Jang-Eok The Korean Society of Environmental Agriculture 2016 한국환경농학회지 Vol.35 No.2
BACKGROUND: Arsenic (As)-contaminated groundwater used for long-term irrigation has emerged as a serious problem by adding As to soils. Phytoremediation potential of fiber crops viz., kenaf (Hibiscus cannabinus L.), mesta (Hibiscus sabdariffa L.), and jute (Corchorus capsularis L.) was studied to clean up As-contaminated soil.METHODS AND RESULTS: Varieties of three fiber crops were selected in this study. Seeds of kenaf, mesta, and jute varieties were germinated in As-contaminated soil. Uptake of As by shoot was significantly higher than that by root in the contaminated soil. In As-contaminated soil, kenaf and mesta varieties accumulated more As, than did jute varieties. In the plant parts above ground, mainly the shoots, the highest As absorption was recorded in kenaf cv. HC-3, followed by kenaf cv. HC-95. Kenaf varieties produced more biomass. In terms of higher plant biomass production, and As absorption, kenaf varieties showed considerable potential to remediate As-contaminated soil.CONCLUSION: The overall As absorption and phytoremediation potentiality of plant varieties were in the order of kenaf cv. HC-3 > kenaf cv. HC-95 > mesta cv. Samu-93 > jute cv. CVE-3 > jute cv. BJC-7370. All varieties of kenaf, mesta, and jute could be considered for an appropriate green plant-based remediation technology in As-contaminated soil.
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( Taufique Arefin(m. ) ),( Mokhlesur Rahman(m. ) ),( Wahid-u-zzaman(m. ) ),( Jang Eok Kim ) 한국응용생명화학회 2016 Journal of Applied Biological Chemistry (J. Appl. Vol.59 No.1
The aim of the present study was to evaluate the degree of metal contamination of the Turag River water and its suitability for irrigation. Twenty water samples were analyzed for physic℃hemical parameters and metals viz., calcium, magnesium, potassium (K), sodium, copper (Cu), zinc (Zn), iron (Fe), manganese (Mn), lead (Pb), cadmium (Cd), chromium (Cr), and nickel (Ni). All water samples were slightly alkaline to alkaline. Regarding electrical conductivity (EC), all samples were suitable for crop in soils with moderate permeability and leaching. Water samples were medium salinity and low alkalinity hazard classes. In terms of total dissolved solids (TDS), all samples were classified as freshwater. As per sodium adsorption ratio (SAR) and soluble sodium percentage (SSP), all samples were classified as excellent. No residual sodium carbonate (RSC) was detected in any of the samples, indicating suitability for irrigation; and all samples were considered very hard. Cr and Mn contents in all samples were above FAO guideline values and, therefore, these metals were considered toxic. Zn, Cu, Pb, Cd, and Ni concentrations were below acceptable limit for irrigation and do not pose a threat to soil environment. Significant relationships were found between EC and TDS, SAR and SSP, SAR and RSC, and SSP and RSC. The combinations of ions such as K.Zn, K.Fe, K.Cu, K.Mn, K. Pb, Zn.Fe, Zn.Cu, Zn.Mn, Fe.Mn, Cu.Mn, Cu.Pb and Mn.Pb exhibited significant correlation. This study revealed that Turag River water samples are contaminated with Cr and Mn. This fact should not be ignored because water contamination by metals may pose a threat to human health through food chain.
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Rezaul H. Ansary,Mokhlesur M. Rahman,Mohamed B. Awang,Haliza Katas,Hazrina Hadi,Farahidah Mohamed,Abd Almonem Doolaanea,Yunus B. Kamaruzzaman 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.9
The aim of this study was to prepare a model protein, bovine serum albumin (BSA) loaded double-walled microspheres using a fast degrading glucose core, hydroxyl-terminated poly(lactide-co-glycolide) (Glu- PLGA) and a moderate-degrading carboxyl-terminated PLGA polymers to reduce the initial burst release and to eliminate the lag phase from the release profile of PLGA microspheres. The double-walled microspheres were prepared using a modified water-in-oil-in-oil-in-water (w/o/o/ w) method and single-polymer microspheres were prepared using a conventional water-in-oil-in-water (w/o/w) emulsion solvent evaporation method. The particle size, morphology, encapsulation efficiency, thermal properties, in vitro drug release and structural integrity of BSA were evaluated in this study. Double-walled microspheres prepared with Glu-PLGA and PLGA polymers with a mass ratio of 1:1 were non-porous, smooth-surfaced, and spherical in shape. A significant reduction of initial burst release was achieved for the double-walled microspheres compared to single-polymer microspheres. In addition, microspheres prepared using Glu-PLGA and PLGA polymers in a mass ratio of 1:1 exhibited continuous BSA release after the small initial burst without any lag phase. It can be concluded that the double-walled microspheres made of Glu-PLGA and PLGA polymers in a mass ratio of 1:1 can be a potential delivery system for pharmaceutical proteins.
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