Browsing by Author "Ogundiran, M. B."

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"Biochar in combination with compost reduced Pb uptake and enhanced the growth of maize in lead (Pb)‑contaminated soil exposed to drought stress "
(Springer, 2010) Adejumo, S. A.; Arowo, D. O.; Ogundiran, M. B.; Srivastava, P.
Crops are constantly faced with the challenges of different abiotic stresses on the field. Development of sustainable approach for stress amelioration on crop is pertinent. This study investigated the ameliorative roles of biochar and compost on maize crop simultaneously subjected to drought and heavy metal (Pb) stresses. Metal stress was imposed by growing maize on Pb-contaminated soil while drought stress was imposed by reducing the soil field capacity to 25 and 50%. Four levels (0, 5, 10 and 15 t/ha) of biochar and compost replicated three times as well as their combinations were used. Pb uptake, translocation factors, photosynthetic pigments, osmolytes (proline and cysteine), biomass accumulation in stressed maize crop, and post-cropping soil Pb concentration were determined. Combination of stresses reduced biomass accumulation in maize. Biochar in combination with compost, however, enhanced biomass production in stressed maize crop by 50–75% compared to unamended soil (control). Proline accumulation was more under the single stress of heavy metal (100% FC) compared to combined stresses. Unlike proline, combined stresses of Pb and 50% FC enhanced chlorophyll and cysteine accumulation more than single stress. Their concentrations were further increased with amendments compared to control. Pb accumulation in maize crop was more under combined stresses than single stress (100% FC). Compared to other soil amendments, application of biochar alone at 10 t/ha, generally reduced Pb uptake by maize and post-cropping soil Pb concentration. Biochar and compost reduced Pb uptake, and enhanced biomass and osmolyte production in stressed maize crop.
Compost and biochar assisted phytoremediation potentials of Moringa oleifera for remediation of lead contaminated soil.
(Elsevier, 2018) Ogundiran, M. B.; Mekwunyei, N. S.; Adejumo, S. A.
The aim of this study was to investigate the germination, growth, tolerance and Pb accumulation potentials of Moringa oleifera in compost and biochar amended Pb-contaminated soils for possible phytoremediation. Lead slag contaminated soil (100%–32,640 mg/kg) was diluted into three Pb contamination levels (75%, 50%, and 25%) by mixing it with uncontaminated control (0%) soil. Sunflower-poultry manure compost (Compost), rice husk biochar (RHB) and groundnut shell biochar (GSB) were applied at 10 g/kg separately to the soils in triplicates and incubated for 2 weeks. Moringa oleifera seedlings were transplanted at two weeks into the incubated soils and set up in greenhouse experiments. Plant height, stem girth, leaf number and biomass were measured at 4 and 8 weeks. Plant roots and shoots were analysed. Moringa oleifera seeds planted in the contaminated and amended contaminated soils failed to germinate. Its seedlings withered off in 100% and 75% but survived in 25% and 50% amended contaminated and control soils. It tolerated Pb contamination up to 8600 mg/kg. The concentrations of Pb in the roots and shoots of the plants at 8 weeks ranged from 930 to 2100 mg/kg and 420–1120 mg/kg respectively for both contamination levels, indicating Pb phytoaccumulation potentials of M. oleifera. Compost and RHB enhanced M. oleifera roots and shoots production. The combination of compost and M. oleifera improved Pb phytoextraction efficiency. The combination of GSB and M. oleifera improved Pb phytostabilisation efficiency. Utilisation of compost, rice RHB and GSB with M. oleifera may be recommended for phytoremediation of Pb-contaminated soil.
Dissolved organic matter, chemical speciation and phyto-availability of lead in contaminated soil amended with composted and un-composted organic manures. Clean-Up Conference 2015,
(CRC CARE (Cooperative Research Centre for Contamination Assessment and Remediation of the Environment), 2015) Adejumo, S. A.; Morakinyo O.; Ogundiran, M. B.
Effects of compost application on remediation and the growth of maize planted on lead contaminated soil
(International Union of Soil Sciences, 2010) Adejumo, S. A.; Togun, A. O.; Adediran, J. A.; Ogundiran, M. B.
A field experiment was conducted in 2008 and 2009 to test for the effects of Mexican Sunflower (SW) and Cassava waste (CW) composts as well as inorganic fertilizer on the growth of maize planted on lead contaminated soil. Different application rates of 0t/ha, 20t/ha and 40t/ha were used for the two types of compost while inorganic fertilizer and 0t/ha were used as checks. The experiment was laid out in Randomized Complete Block Design with four replicates. It was observed that compost application increased significantly the vegetative and yield parameters of maize and performed better than inorganic fertilizer (P<0.05). Higher dose (40t/ha) of MSW compost gave the highest plant height, dry matter yield, leaf area and grain yield. More importantly, the experiment shows that there was a reduction in the final concentration of lead in soils of all the compost treated plots by 50-70%. Though, application of compost did not restrict the uptake of lead by the maize crop the concentrations were lower than those of control and inorganic fertilizer plants. Higher concentrations were also detected in the root than other plant parts. This method of remediation could be recommended for restoration of lead contaminated sites.
Field assessment of progressive remediation of soil contaminated with lead-acid battery waste in response to compost application
(Scientific Research Publishing, 2011) Adejumo, S. A.; Togun, A. O.; Adediran, J. A.; Ogundiran, M. B.
Addition of compost to heavy metal-contaminated soil has been employed to remediate contamination. Such rectification, however, depends on the type of compost and the contaminant involved. The efficacy of Mexican sunflower (MSC) and Cassava peel (CPC) composts applied at 0, 20 and 40 t/ha as well as inorganic fertilizer (NPK, 20:10:10) (100 kg N/ha) on the remediation of a battery waste-contaminated site in Ibadan, Nigeria was assessed. No compost or NPK fertilizer served as the control. The experimental design was a randomized complete block with 4 replicates. Soil analysis before and at 1, 2, 3 and 12 months after compost application was carried out. Mean lead (Pb) concentration (134,000 mg/kg) was high at this site. Twelve months after treatment, MSC and CPC applied at 40 t/ha had reduced the plant available lead concentration in the soil by 69 and 49%, respectively, whereas 20 t/ha had reduced the concentration by 58 and 34%, respectively. The relationships between soil lead and organic matter content (r = -0.75), phosphorous (r = -0.59) and pH (r = -0.77) were negative. NPK fertilizer had a limited effect (7% reduction) on Pb. Application of MSC at 40 t/ha brought about a remarkable reduction in Pb concentration.
Performance evaluation of metakaolin clay geopolymers synthesised with bamboo wood ash as an activator.
(2018) Ogundiran, M. B.; Akinola, O. P
Poultry litter management in Lagos and effects of its soil application on the growth of okra (Abelmoschus esculentus
(Academic Journals., 2015) Ogundiran, M. B.; Ademola, E. F.; Adejumo, S. A.
Poultry litter constitutes one of the animal wastes that are produced in large quantity. Information on the quantity generated may enhance planning for its utilisation. Quantification of poultry litter (PL) generated and its utilisation is rare in Nigeria. This study was designed to investigate PL management in Lagos, Nigeria and possible utilisation potential. Questionnaires were distributed to poultry farmers in Lagos to evaluate poultry waste generation and management practices. Additionally, PL was also quantified from selected farms. Greenhouse experiments were conducted to evaluate the agronomic effects of raw and composted PL (each applied at 0, 5, 10 t/ha and replicated four times) on the growth and heavy metals uptake of Abelmoschus esculentus (okra). Poultry farms were situated in the residential, non-residential and industrial areas with non-residential areas housing a larger percentage. About 53% of the farms were located near rivers or streams. A few of the poultry farmers treated and utilised PL using chemical and physical methods before disposal. Also, no record of waste utilization was found in 72.3% of the farms. About 87.4% of the farmers quantified the PL generated. About 89.3% of the farmers disposed PL in open dumpsites. Mean poultry litter generated from four farms per bird/day was 0.11 ± 0.001 kg. The HMs contents in plants grown on the poultry treated soils were below the permissible levels in soil. The heavy metals concentrations in the leaves and fruits (which are usually the edible parts of okra plants) for all the treatments fall within WHO/FAO permissible levels. Overall, soil amended with 5 t/ha composted poultry litter performed best in terms of fruit production and reduction in HMs uptake. The use of composted poultry litter as fertiliser at calculated quantity will increase PL management.
Soil amendment with compost and crop growth stages influenced heavy metal uptake and distribution in maize crop grown on lead-acid battery waste contaminated soil.
(Elsevier, 2018) Adejumo, S. A.; Ogundiran, M. B.; Togun, A. O.
Heavy metal contamination of agricultural soils poses serious risk to human health through food chain. Immobilization technique to reduce metal bioaccumulation in plant tissues is being promoted. Field experiment was carried out on heavy metal contaminated site to test for the efficacy of different organic amendments (Mexican sunflower compost (MSC) and Cassava peel compost (CPC) applied at 0, 20 and 40 t/ha) and inorganic fertilizer (NPK; 20:10:10 at 100 kg Nitrogen /ha) in metal immobilization and uptake by maize crop at different growing stages (one, two month(s) after planting (1MAP, 2MAP) and at harvesting). Compost amendments generally reduced heavy metal accumulation in maize crop unlike NPK and control where high metal toxicity led to plant death at 2MAP. Pb was highly accumulated at every growing stage followed by Cd while Cr concentration was below the detection limit at harvesting. Bioaccumulation and transfer factors were found to depend on maize growing stage with higher accumulation at 1MAP. Percentage Pb accumulation in the shoot was more at 1MAP but reversed at 2MAP and harvesting with higher accumulation in the root. Application of MSC and CPC at 20 and 40 t/ha reduced Pb accumulation in maize by 37.8–64.7% compared with control and the reduction at harvesting was more significant than those recorded at 1MAP and 2MAP, The study concluded that compost reduced heavy metals accumulation in maize crop and that metal accumulation depends on maize growth stage.
Stabilisation of Pb in Pb smelting slag-contaminated soil by compost-modified biochars and their effects on maize plant growth
(Scientific Research Publishing, Inc. (SCIRP), 2015) Ogundiran, M. B.; Lawal, O. O.; Adejumo, S. A.
Compost has been used to stabilise lead (Pb) in soil. However, compost contains a high level of dissolved organic matter (DOM) which may make Pb bioavailable in plant and thereby limiting its effectiveness and application. Addition of biochar to compost can reduce this effect. Rice husk (RH) and Cashew nut shell (CNS) biochars and compost-modified biochars were used in comparison to compost for stabilizing Pb in lead smelting slag (LSS)-contaminated soil (Pb = 18,300 mg/kg) in Nigeria. Efficiency of Pb stabilisation in control and amended soils was assessed using CaCl2 batch leaching experiment and plant performance. In pot experiments, maize plant was grown on the contaminated soil and on soil treated with minimum and optimum doses of the amendments singly and in combination for 6 weeks. Agronomical and chemical parameters of the plants were measured. CaCl2-extractable Pb in the untreated soil was reduced from 60 mg/kg to 0.55 mg/kg in RHB amended soils and non-detectable in other amended soils. RH-biochar/compost increased plant height, number of leaf and leaf area more than the others. Similarly, at minimum rate, it reduced root and shoot Pb by 91% and 86.0% respectively. Compost-modified rice husk biocharstabilised Pb in lead smelting slag contaminated soil reduced Pb plant uptake and improved plant growth. Lead stabilisation through the use of rice husk biochar with compost may be a green method for remediation of lead smelting slag-contaminated soil.