Arsenic Mitigation Approach in Soil by Some Indigenous Sources of Biochar Made at Low Pyrolysis Temperature

2020 ◽  
pp. 93-108
Author(s):  
N. Ferdousi ◽  
S. M. Imamul Huq
Keyword(s):  
Sewage Sludge ◽  
Poultry Manure ◽  
Nutrient Content ◽  
Water Soluble ◽  
Future Application ◽  
Cow Dung ◽  
Pyrolysis Process ◽  
Incubation Study ◽  
And Behavior

Biochar is being reported now a-days to potentially reduce the bioavailability of arsenic (As). A pot culture and an in vitro incubation study was conducted to evaluate the efficacy of biochar produced from different sources (viz., cow dung, poultry manure and sewage sludge) at low temperature (250ºC) on the phytoavailability of As. An experimental setup containing two sets of treatments (As and no-As) were followed. Biochar was applied at the rate of 5t/ha to the soils that received As treatment at a rate of 1mg/L As (80% arsenite and 20% arsenate). After 45 days of growth of Kalmi (Ipomoea aquatica), plant and soil samples were analyzed. Biochar insignificantly increased plant growth.  Biochar was observed to be more effective in alleviating As accumulation in plant than the biomass. The incubation study was done for 0, 15, 30 and 45 days to diagnose the temporal sorption of water soluble As by biochars. All the biochar materials reduced As availability than their corresponding biomass materials. Measurement of different physical (e.g. surface area, morphology, elemental composition), chemical (CEC, nutrient content, As) and physicochemical (pH) properties of the biochar showed that through pyrolysis process nitrogen(N), sulfur (S), phosphorus (P) content and pH of the biomass decreased and on the other hand potassium (K), As content and CEC increased. Slow pyrolysis process and variation in biomass material influenced the properties and behavior of biochar. Among the biochars, sewage sludge biochar showed the maximum and cowdAsung showed the minimum sorption capacity for As. Due to the threat of As to health and environment, this topic requires more consideration.  Moreover, covering all the above issues, this study identifies research gaps in the use of biochar as an adsorbent for As and proposes potential areas for future application of biochar.

scholarly journals Effects of Nutrient Enriched Municipal Solid Waste Compost on Yield and Nutrient Content of Cabbage in Alluvial Soil

2020 ◽  
pp. 32-42
Author(s):  
Marufa Sultana ◽  
Mohammad Jahiruddin ◽  
Mohammad Rafiqul Islam ◽  
Mohammad Mazibur Rahman ◽  
Md. Anwarul Abedin
Keyword(s):  
Soil Fertility ◽  
Field Experiment ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Poultry Manure ◽  
Nutrient Status ◽  
Nutrient Content ◽  
Cow Dung ◽  
Msw Compost ◽  
Compost Amendment

Composting of municipal solid waste (MSW) is a good option for solid waste recycling, but its use by the farmers is limited because of its very low nutrient status. Aims: The study aimed at nutrient enrichment of marketed MSW compost by using some organic materials and evaluating the influence of nutrient enriched MSW compost on yield and nutrient content of cabbage (Brassica oleracea L.). Place and Duration of Study: MSW compost amendment, field experiment and nutrient analysis were carried out at Bangladesh Agricultural University (BAU), Mymensingh during October 2017 to June 2018. Methodology: We prepared three types of amended compost by mixing 20% mustard oil cake (MOC), and 30% poultry manure (PM) or cow dung (CD) or sugarcane press mud (SPM) with 50% MSW compost. A liquid culture of Trichoderma viride was inoculated to every type of compost. The field experiment was conducted to evaluate the performance of the amended MSW composts on yield and nutrient content of cabbage (cv. Atlas-70), and on soil fertility. The experimental soil was silt loam having 6.7 pH and 2.79% organic matter; according to Soil Taxonomy it belongs to Aeric Haplaquept under the order Inceptisols. Results: Based on the yield and nutrient concentration (N, P, K & S) of cabbage, the treatment containing 50% fertilizers + 50% compost mixture (MSW compost + MOC + SPM in a ratio of 5:2:3) demonstrated the best result followed by poultry manure amended compost. Use of the amended composts had residual effects on soil showing an increased N, P, K & S content. Conclusion: Organic amendment of MSW compost inoculated with Trichoderma is a noble means to increase the nutrient status of marketed MSW compost and improve the soil fertility and crop productivity. The results have significant value in fertilizer management strategies for vegetables cultivation in sub-tropical countries.

scholarly journals Performance of different organic fertilizers in improving growth and yield of boro rice

2019 ◽  
Vol 16 (2) ◽  
pp. 153-166
Author(s):  
TS Hoque ◽  
I Jahan ◽  
MR Islam ◽  
M Ahmed
Keyword(s):  
Block Design ◽  
Poultry Manure ◽  
Nutrient Content ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Yield Enhancement ◽  
Cow Dung ◽  
Yield Attributes ◽  
Science Field ◽  
Positive Effects

A field experiment was conducted at two locations i.e. at Soil Science Field of Bangladesh Agricultural University and at Farmer’s field of Fakirakanda village of Mymensingh Sadar to evaluate the effects of different organic fertilizers on the growth and yield of rice (BRRI dhan28). The experiments at each location containing seven treatments were laid out in a randomized complete block design with three replications. The treatments were T0: Control, T1: 75% RFD; T2: 100% RFD, T3: 75% RFD + Kazi Jaibo Shar (5 tha-1), T4: 75% RFD + Kazi Jaibo Shar (3 t ha-1), T5: 75% RFD + Poultry manure (3 t ha-1) and T6: 75% RFD + Cow dung (5 t ha-1). Application of poultry manure as well as Kazi Jaibo Shar showed positive effects on yield attributes, grain and straw yields of rice, nutrient (N, P, K and S) contents and uptake by grain, straw and in total. The performance of 75% RFD with poultry manure @ 3 t ha-1 was the best in producing yield components, grain and straw yields of rice. At both locations, the performance of same dose (3 t ha-1) of poultry manure and Kazi Jaibo Shar was almost similar in producing growth and yield contributing characters, grain and straw yields, - nutrient content and uptake by rice while each of these manures compensated up to 25% of recommended chemical fertilizers. Therefore, considering the soil health, poultry manure or Kazi Jaibo Shar @ 3 t ha-1 is recommended for growth and yield enhancement in rice. SAARC J. Agri., 16(2): 153-166 (2018)

scholarly journals Impact of organic wastes on soil environment and yield of T-aman rice

2015 ◽  
Vol 26 (2) ◽  
pp. 122-128
Author(s):  
MA Habib ◽  
R Khatun ◽  
MS Hossen
Keyword(s):  
Grain Yield ◽  
Crop Yield ◽  
Environmental Science ◽  
Block Design ◽  
Poultry Manure ◽  
Nutrient Content ◽  
Organic Wastes ◽  
Cow Dung ◽  
Land Preparation ◽  
Farm Waste

Organic wastes are rich in nutrients that can improve soil fertility and enhance crop yield. A study was conducted at the experimental field of Department of Environmental Science, Bangladesh Agricultural University, Mymensingh during July-December 2014 to examine the effect of different organic wastes on soil quality and rice yield. The experiment was laid out in a randomized complete block design (RCBD) taking five treatments with three replications. The treatments were: T1 (recommended chemical fertilizers), T2 (50% farm waste + 50% poultry manure), T3 (50% poultry manure + 50% municipal solid waste), T4(50% cowdung + 50% farm waste) and T5 (50% farm waste+25% poultry manure +25% cow dung). All wastes were applied at one time after final land preparation and before 15 days of rice (BRRI dhan 49) transplanting. Minimum and maximum soil moisture content was 26.16% and 30.83% recorded at T1 and T2 treatments and that of pH values were 5.26 and 5.93 at T3and T4 treatments, respectively. Incase of soil nutrient content, organic matter, N and S content was highest in T2 treatment and P and K contents were highest in T4 treatment whereas lowest values were observed in T1 treatment.  Pb and Cd contents were highest at T5 treatment and lowest at T1 treatment. However, the values of Pb and Cd were below the permissible limit for agricultural soil. The highest grain yield (4.72 t ha-1) was recorded in T4 treatment and the lowest grain yield (3.87 t ha-1) was observed in T1 treatment. Considering crop yield and soil properties, treatment T4 was better compared to other treatments. The present study clearly indicated that the quality of soil and yield increased due to the application of organic waste compared to chemical fertilizer.Progressive Agriculture 26 (2): 122-128, 2015

Controlled Release of Metformin Hydrochloride I. In vitro Release from Physical Mixture Containing Xanthan Gum as Hydrophilic Rate Retarding Polymer

1970 ◽  
Vol 4 (1) ◽  
Author(s):  
Mashkura Ashrafi ◽  
Jakir Ahmed Chowdhury ◽  
Md Selim Reza
Keyword(s):  
Controlled Release ◽  
Xanthan Gum ◽  
In Vitro Release ◽  
Correlation Coefficients ◽  
High Ratio ◽  
Water Soluble ◽  
Metformin Hydrochloride ◽  
Model Drug ◽  
Very High

Capsules of different formulations were prepared by using a hydrophilic polymer, xanthan gum and a filler Ludipress. Metformin hydrochloride, which is an anti-diabetic agent, was used as a model drug here with the aim to formulate sustained release capsules. In the first 6 formulations, metformin hydrochloride and xanthan gum were used in different ratio. Later, Ludipress was added to the formulations in a percentage of 8% to 41%. The total procedure was carried out by physical mixing of the ingredients and filling in capsule shells of size ‘1’. As metformin hydrochloride is a highly water soluble drug, the dissolution test was done in 250 ml distilled water in a thermal shaker (Memmert) with a shaking speed of 50 rpm at 370C &plusmn 0.50C for 6 hours. After the dissolution, the data were treated with different kinetic models. The results found from the graphs and data show that the formulations follow the Higuchian release pattern as they showed correlation coefficients greater than 0.99 and the sustaining effect of the formulations was very high when the xanthan gum was used in a very high ratio with the drug. It was also investigated that the Ludipress extended the sustaining effect of the formulation to some extent. But after a certain period, Ludipress did not show any significant effect as the pores made by the xanthan gum network were already blocked. It is found here that when the metformin hydrochloride and the xanthan gum ratio was 1:1, showed a high percentage of drug release, i.e. 91.80% of drug was released after 6 hours. But With a xanthan gum and metformin hydrochloride ratio of 6:1, a very slow release of the drug was obtained. Only 66.68% of the drug was released after 6 hours. The percent loading in this case was 14%. Again, when Ludipress was used in high ratio, it was found to retard the release rate more prominently. Key words: Metformin Hydrochloride, Xanthan Gum, Controlled release capsule Dhaka Univ. J. Pharm. Sci. Vol.4(1) 2005 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

NGHIÊN CỨU ẢNH HƯỞNG CỦA CHITOSAN HOÀ TAN TRONG NƯỚC ĐẾN NẤM Colletotrichum musae D1 GÂY BỆNH THÁN THƯ TRÊN CHUỐI Ở ĐIỀU KIỆN IN VITRO

2016 ◽  
Vol 119 (5) ◽  
Author(s):  
Lê Thanh Long ◽  
Nguyễn Văn Toản ◽  
Nguyễn Văn Huế ◽  
Trang Sĩ Trung ◽  
Vũ Ngọc Bội
Keyword(s):  
Water Soluble ◽  
28S Rrna ◽  
Colletotrichum Musae

Chủng D1 phân lập từ các mẫu chuối có vết bệnh thán thư điển hình được sử dụng để nghiên cứu khả năng kháng nấm của chitosan hoà tan trong nước (Water-soluble chitosan_WSC) ở điều kiện in vitro. Kết quả phân tích trình tự gen mã hoá 28S rRNA của chủng D1 cho thấy tương đồng trình tự cao với các trình tự tương ứng của loài Colletotrichum musae và được ký hiệu là Colletotrichum musae D1. Kết quả các thí nghiệm đều cho thấy C. musae D1 rất nhạy cảm với WSC, hiệu lực ức chế tăng khi tăng nồng độ WSC xử lý ở điều kiện in vitro. Trên môi trường PDA, nồng độ 1,6% WSC ức chế hoàn toàn sự sinh trưởng của sợi nấm C. musae D1, nồng độ ức chế 50% (PIRG50) và nồng độ ức chế tối thiểu 90% (MIC90) tương ứng với nồng độ WSC 0,28% và 0,88%. Trong môi trường PDB, giá trị IC50 và MIC90 tương ứng là 0,11% và 0,43% và sự phát triển của sợi nấm C. musae D1 bị ức chế hoàn toàn ở nồng độ 0,8%. WSC không chỉ ức chế sự nảy mầm mà còn gây biến đổi bất thường bào tử nấm khi quan sát trên kính hiển vi.

Fenofibrate Solid Dispersion for Improving Oral Bioavailability: Preparation, and Characterization and in vivo Evaluation

2020 ◽  
Vol 13 (5) ◽  
pp. 5102-5109
Author(s):  
Venu Madhav K ◽  
Somnath De ◽  
Chandra Shekar Bonagiri ◽  
Sridhar Babu Gummadi
Keyword(s):  
Oral Bioavailability ◽  
Oral Delivery ◽  
Solid Dispersions ◽  
In Vitro Release ◽  
Aqueous Solubility ◽  
Water Soluble ◽  
Scanning Calorimetry ◽  
In Vivo Evaluation

Fenofibrate (FN) is used in the treatment of hypercholesterolemia. It shows poor dissolution and poor oral bioavailability after oral administration due to high liphophilicity and low aqueous solubility. Hence, solid dispersions (SDs) of FN (FN-SDs) were develop that might enhance the dissolution and subsequently oral bioavailability. FN-SDs were prepared by solvent casting method using different carriers (PEG 4000, PEG 6000, β cyclodextrin and HP β cyclodextrin) in different proportions (0.25%, 0.5%, 0.75% and 1% w/v). FN-SDs were evaluated solubility, assay and in vitro release studies for the optimization of SD formulation. Differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM) analysis was performed for crystalline and morphology analysis, respectively. Further, optimized FN-SD formulation evaluated for pharmacokinetic performance in Wistar rats, in vivo in comparison with FN suspension.  From the results, FN-SD3 and FN-SD6 have showed 102.9 ±1.3% and 105.5±3.1% drug release, respectively in 2 h. DSC and PXRD studies revealed that conversion of crystalline to amorphous nature of FN from FT-SD formulation. SEM studies revealed the change in the orientation of FN when incorporated in SDs. The oral bioavailability FN-SD3 and FN-SD6 formulations exhibited 2.5-folds and 3.1-folds improvement when compared to FN suspension as control. Overall, SD of FN could be considered as an alternative dosage form for the enhancement of oral delivery of poorly water-soluble FN.

Solubility Enhancement of Poorly Water-Soluble Antifungal Drug Acyclovir by Nanocrystal Formulation Approach

2018 ◽  
Vol 11 (2) ◽  
pp. 4036-4042
Author(s):  
Prakash Goudanavar ◽  
Ankit Acharya ◽  
Vinay C.H
Keyword(s):  
Chemical Interaction ◽  
Research Work ◽  
Antiviral Drug ◽  
In Vitro Release ◽  
Oral Route ◽  
Water Soluble ◽  
Precipitation Method ◽  
Dsc Studies ◽  
Ft Ir

Administration of an antiviral drug, acyclovir via the oral route leads to low and variable bioavailability (15-30%). Therefore, this research work was aimed to enhance bioavailability of acyclovir by nanocrystallization technique. The drug nanocrystals were prepared by anti-solvent precipitation method in which different stabilizers were used. The formed nanocrystals are subjected to biopharmaceutical characterization including solubility, particle size and in-vitro release. SEM studies showed nano-crystals were crystalline nature with sharp peaks. The formulated drug nanocrystals were found to be in the range of 600-900nm and formulations NC7 and NC8 showed marked improvement in dissolution velocity when compared to pure drug, thus providing greater bioavailability. FT-IR and DSC studies revealed the absence of any chemical interaction between drug and polymers used. 

Formulation and Evaluation of Orally Disintegrating Tablets of Lamotrigine

2015 ◽  
Vol 8 (2) ◽  
pp. 2881-2888
Author(s):  
Sudarshan Singh ◽  
S S Shyale ◽  
P Karade
Keyword(s):  
Drug Release ◽  
Water Soluble ◽  
In Vitro Dissolution ◽  
Disintegration Time ◽  
Orally Disintegrating Tablet ◽  
Drug Content ◽  
Weight Variation ◽  
Wetting Time ◽  
Croscarmellose Sodium

The aim of this study was to design orally disintegrating tablet (ODT) of Lamotrigine. It is an Antiepileptic drug which is widely used in epilepsy. It is also used in simple and complex partial seizures and secondary generalized tonic-clonic seizures. It is poorly water soluble drug (0.46 mg/ml). Thus, an attempt was made to enhance the water solubility by complexation with β-cyclodextrin (1:1 molar ratios). The orally disintegrating tablet of lamotrigine was prepared by direct compression method using different concentration of superdisintegrants such as Sodium starch glycollate, croscarmellose sodium by sublimating agent such as camphor. The formulations were evaluated for weight variation, hardness, friability, drug content, wetting time, in vitro disintegration time and in vitro dissolution studies. The prepared tablets were characterized by Fourier transform infrared spectroscopy and differential scanning calorimetry. The disintegration time for the complexed tablets prepared by different concentration of superdisintegrants was found to be in range of 32.54 ± 0.50 to 55.12 ± 0.57 sec and wetting time of the formulations was found to be in range of 28.47 ± 0.67 to 52.19 ± 0.72 sec. All the formulation showed almost 100 percent of drug release within 15 min. Among all the formulation F6 and F7 prepared with 18% croscarmellose sodium and camphor shows faster drug release, respectively 10 min, F6 gives good result for disintegration time, drug release, wetting time and friability. Further formulations were subjected to stability testing for 30 days at temperature of 40 ± 5 ºC/75 ± 5 %RH. Tablets showed no appreciable changes with respect to physical appearance, drug content, disintegration time and dissolution profiles. Results were statistically analyzed by one-way ANOVA at a p < 0.05. It was found that, the data at any point of time are significant at p < 0.05.

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