Biodegradation characteristics of chlorpyrifos by sodium alginate immobilized bacteria

2013 ◽  
Vol 20 (12) ◽  
pp. 1636-1642 ◽  
Author(s):  
Hai-Ming DUAN
Keyword(s):  
Sodium Alginate ◽  
Immobilized Bacteria

Bacterial community dynamics and enhanced degradation of di- n -octyl phthalate (DOP) by corncob-sodium alginate immobilized bacteria

Geoderma ◽  
2017 ◽  
Vol 305 ◽  
pp. 264-274 ◽  
Author(s):  
Ke Zhang ◽  
Yihao Liu ◽  
Hongbing Luo ◽  
Qiang Chen ◽  
Zhanyuan Zhu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Sodium Alginate ◽  
Community Dynamics ◽  
Immobilized Bacteria ◽  
Bacterial Community Dynamics ◽  
Enhanced Degradation

scholarly journals Degradation of petroleum hydrocarbons by embedding immobilized crude oil degrading bacteria

2020 ◽  
Vol 82 (11) ◽  
pp. 2296-2303
Author(s):  
Pin Zhang ◽  
Xiaoli Wang ◽  
Shitao Peng ◽  
Xiumei Tian ◽  
Zhaokun Li ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Crude Oil ◽  
Sodium Alginate ◽  
Petroleum Hydrocarbons ◽  
Degradation Rate ◽  
Immobilized Bacteria ◽  
Design Expert ◽  
Surface Method ◽  
Degrading Bacteria ◽  
Degradation Effect

Abstract In this study, the removal effect of free and immobilized bacteria on crude oil was determined. Sodium alginate and polyvinyl alcohol were used as embedding agent, and ramie was modified as an adsorbent to immobilize free bacteria. The conditions for preparing immobilized pellets were optimized using the response surface method, and the best combination was simulated and obtained by Design-Expert 8.0. The best degradation rate of immobilized bacteria was 75.52%. The degradation by free bacteria and immobilized bacteria showed that the selected microorganisms had a good degradation effect on petroleum hydrocarbons.

scholarly journals Biochemical Pathways and Enhanced Degradation of Dioctyl Phthalate (DEHP) by Sodium Alginate Immobilization in MBR System

2020 ◽  
Author(s):  
Ke Zhang ◽  
Xiangling Wu ◽  
Hongbing Luo ◽  
Wei Wang ◽  
Siqiao Yang ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
Mass Fraction ◽  
Community Dynamics ◽  
Positive Impact ◽  
Illumina Miseq ◽  
System Stability ◽  
Illumina Miseq Sequencing ◽  
Miseq Sequencing ◽  
Immobilized Bacteria ◽  
Dioxygenase Gene

A bacterial strain that could effectively degrade DEHP was isolated from the activated sludge and identified as Bacillus sp. by DNA sequencing. The biochemical degradation pathway of DEHP was further analyzed by GC-MS, and the results showed that DEHP was first decomposed into phthalates (DBP). Diuretic sylycol (DEP) was then generated, and phthalates (PA) were generated by a continuous de-ehelateization reaction. Phthalic acid (PA) was oxidized, dehydrogenated, and decarboxylated into protocatechins. Protocatechins enter the TCA cycle through orthotopic ring opening.　To enhance DEHP degradation, sodium alginate and calcium chloride were used as embedding and cross-linking materials, and the strain was immobilized. The immobilization conditions were optimized via an orthogonal experiment, and the results showed that the optimal immobilization conditions were SA mass fraction of 4%, CaCl2 mass fraction of 5%, ratio of bacteria to SA of 1:1, and the crosslinking time of 6 hours. The immobilized bacteria agent was further applied to MBR systems. The results showed that the removal rate of DEHP (5mg/L) in the system by immobilized bacteria was 91.9%, which is significantly higher than that of free bacteria. The 3, 4-dioxygenase gene and microbial community dynamics were analyzed by q-PCR and Illumina Miseq sequencing. The q-PCR results showed that the number of copies of 3, 4-dioxygenase gene in the immobilized system was significantly higher than that of free bacteria. Illumina Miseq sequencing results showed that Micromonospora, Rhodococcus, Bacteroides and Pseudomonas were the dominant generas in the MBR system. The analysis of bacterial community structure indicated that immobilization technology had a positive impact on the system stability. The results implied that this immobilized technique had potential applications in DEHP wastewater treatment.

Sodium alginate assisted construction of ZnSnO 3 microspheres enhanced HCHO sensing performance under UV illumination at room temperature

2019 ◽  
Vol 14 (14) ◽  
pp. 1381-1384
Author(s):  
Jie Chen ◽  
Zhihua Ying ◽  
Peng Zheng ◽  
Rongfa Gao ◽  
Jinbang Mei
Keyword(s):  
Sodium Alginate ◽  
Room Temperature ◽  
Uv Illumination ◽  
Sensing Performance

Creation of new local coverings of hemostatic action on the basis of sodium alginate

2018 ◽  
Vol 15 (3) ◽  
pp. 222-229
Author(s):  
G.G. Belozerskaya ◽  
D.Yu. Bychichko ◽  
V.A. Kabak ◽  
A.R. Lempert ◽  
O.E. Nevedrova ◽  
...  
Keyword(s):  
Sodium Alginate

Formulation and Evaluation of Galantamine Hydrobromide Floating Matrix Tablet

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Poreddy Srikanth Reddy ◽  
Penjuri Subhash Chandra Bose ◽  
Vuppula Sruthi ◽  
Damineni Saritha
Keyword(s):  
Sodium Alginate ◽  
Xanthan Gum ◽  
Lag Time ◽  
Matrix Tablets ◽  
In Vitro Dissolution ◽  
Matrix Tablet ◽  
Compression Technique ◽  
Weight Variation ◽  
The Matrix

The aim of the present work was to prepare floating tablets of galantamine HBr using sodium alginate and xanthan gum as matrix forming carriers. Galantamine HBr is used for the treatment of mild to moderate Alzheimer's disease and various other memory impairments, in particular those of vascular origin. The matrix tablet formulations were prepared by varying the concentrations of sodium alginate and xanthan gum. The tablets were prepared by direct compression technique using PVP K-30 as a binder and sodium bicarbonate for development of CO2. The prepared matrix tablets were evaluated for properties such as hardness, thickness, friability, weight variation, floating lag time, compatibility using DSC and FTIR. In vitro dissolution was carried out for 12 hrs in 0.1N HCl at 37±0.5 ºC using USP paddle type dissolution apparatus. It was noted that, all the prepared formulations had desired floating lag time and constantly floated on dissolution medium by maintaining the matrix integrity. The drug release from prepared tablets was found to vary with varying concentration of the polymers, sodium alginate and xanthan gum. From the study it was concluded that floating drug delivery system for galantamine HBr can be prepared by using sodium alginate and xanthan gum as a carrier.

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