Efficient removal of nitrogen and phosphorus in aqueous solutions using modified water treatment residuals–sodium alginate beads

2021 ◽  
Author(s):  
Guangyi Fu ◽  
Yuanyuan Zhao ◽  
Shuang Zhou ◽  
Chongyu Chen ◽  
Yu Zhong ◽  
...  
Keyword(s):  
Water Treatment ◽  
Aqueous Solutions ◽  
Sodium Alginate ◽  
Alginate Beads ◽  
Water Treatment Residuals ◽  
Efficient Removal ◽  
Nitrogen And Phosphorus

Adsorption of methylene blue from aqueous solutions using water treatment sludge modified with sodium alginate as a low cost adsorbent

2016 ◽  
Vol 75 (2) ◽  
pp. 281-295 ◽  
Author(s):  
Hamid Poormand ◽  
Mostafa Leili ◽  
Marzieh Khazaei
Keyword(s):  
Methylene Blue ◽  
Water Treatment ◽  
Aqueous Solutions ◽  
Sodium Alginate ◽  
Contact Time ◽  
Low Cost ◽  
Drinking Water Treatment ◽  
Water Treatment Sludge ◽  
Maximum Sorption Capacity ◽  
Adsorbent Dose

In this research, aluminum-based drinking water treatment sludge is used as a starting material and immobilized by sodium alginate to develop low cost adsorbent for the removal of methylene blue (MB) from aqueous solutions. The studied variables included pH, adsorbent dose, initial MB concentration and contact time. Characteristics of the adsorbent were also studied using scanning electron microscopy and Fourier transform infrared spectroscopy (FTIR). It was revealed from kinetic tests that removal efficiency of MB was 88.5% under the optimum conditions of pH 8, initial MB concentration of 50 mg/L, contact time of 60 min, and adsorbent dose of 0.3 g/L. The oxygen functional groups such as –OH, C–O–C and C=O were found on the surface of developed adsorbent by FTIR. In addition, the adsorption data fitted well the Langmuir adsorption model with the maximum sorption capacity of 909.1 mg/g, and followed the pseudo-second-order kinetics. Findings of this study indicate that the prepared adsorbent is promising for further development of an effective and economical adsorbent material in the near future.

scholarly journals Efficient removal of As(V) from aqueous media by magnetic nanoparticles prepared with Iron-containing water treatment residuals

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Huiping Zeng ◽  
Longxue Zhai ◽  
Tongda Qiao ◽  
Yaping Yu ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Treatment ◽  
Aqueous Media ◽  
Water Treatment Residuals ◽  
Efficient Removal

Adsorption of Co(II) from aqueous solutions by water treatment residuals

2017 ◽  
Vol 52 ◽  
pp. 232-239 ◽  
Author(s):  
Jian Jiao ◽  
Jinbo Zhao ◽  
Yuansheng Pei
Keyword(s):  
Water Treatment ◽  
Aqueous Solutions ◽  
Water Treatment Residuals ◽  
Adsorption Of Co

scholarly journals Highly Efficient Removal for Methylene Blue and Cu2+ onto UiO-66 Metal–Organic Framework/Carboxylated Graphene Oxide-Incorporated Sodium Alginate Beads

ACS Omega ◽  
2021 ◽  
Vol 6 (36) ◽  
pp. 23528-23541 ◽  
Author(s):  
Abdelazeem S. Eltaweil ◽  
Injy M. Mamdouh ◽  
Eman M. Abd El-Monaem ◽  
Gehan M. El-Subruiti
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Sodium Alginate ◽  
Metal Organic Framework ◽  
Alginate Beads ◽  
Efficient Removal ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

Characterization and Screening of a Novel Multiparticulate Pulsatile Delivery of Aceclofenac

2016 ◽  
Vol 9 (5) ◽  
pp. 3494-3501
Author(s):  
Bipul Nath ◽  
Santimoni Saikia
Keyword(s):  
Drug Release ◽  
Sodium Alginate ◽  
Alginate Beads ◽  
In Vitro Drug Release ◽  
Dsc Studies ◽  
Ft Ir ◽  
Lag Period ◽  
Pulsatile Delivery ◽  
Ca Alginate

In the present investigation, sodium alginate based multiparticulate system overcoated with time and pH dependent polymer was studied in the form of oral pulsatile system to achieve pulsatile with sustained release of aceclofenac for chronotherapy of rheumatoid arthritis seven batches of micro beads with varying concentration of sodium alginate (2-5 %) were prepared by ionotropic-gelation method using CaCl2 as cross-linking agent. The prepared Ca-alginate beads were coated with 5% Eudragit L100 and filled into pulsatile capsule with varying proportion of plugging materials. Drug loaded microbeads were investigated for physicochemical properties and drug release characteristics. The mean particle sizes of drug-loaded microbeads were found to be in the range 596±1.1 to 860 ± 1.2 micron and %DEE in the range of 65-85%. FT-IR and DSC studies revealed the absence of drug polymer interactions. The release of aceclofenac from formulations F1 to F7 in buffer media (pH 6.8) at the end of 5h was 65.6, 60.7, 55.7, 41.2, 39.2, 27 and 25% respectively. Pulsatile system filled with eudragit coated Ca-alginate microbeads (F2) showed better drug content, particle size, surface topography, in-vitro drug release in a controlled manner. Different plugging materials like Sterculia gum, HPMC K4M and Carbopol were used in the design of pulsatile capsule. The pulsatile system remained intact in buffer pH 1.2 for 2 hours due to enteric coat of the system with HPMCP. The enteric coat dissolved when the pH of medium was changed to 7.4. The pulsatile system developed with Sterculia gum as plugging material showed satisfactory lag period when compared to HPMC and Carbopol.

Modelling waste output from trout farms

1995 ◽  
Vol 31 (10) ◽  
pp. 103-121
Author(s):  
J.-O. Frier ◽  
J. From ◽  
T. Larsen ◽  
G. Rasmussen
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Numerical Model ◽  
Organic Compounds ◽  
Waste Treatment ◽  
Waste Water Treatment ◽  
Nitrogen And Phosphorus ◽  
Waste Discharge ◽  
Scientific Background ◽  
Trout Farms

The aim of waste modelling in aquaculture is to provide tools for simulating input, transformation, output and subsidiary degradation in recipients of organic compounds, nitrogen, and phosphorus. The direct purpose of this modelling is to make it possible for caretakers and water authorities to calculate waste discharge from existing and planned aquaculture activities. A special purpose is simulating outcome of waste water treatment and altered feeding programmes. Different submodels must be applied for P, N, and organics, as well as for the different phases of food and waste treatment. Altogether this calls for an array of co-operating submodels for a sufficient coverage of the options. In all the required fields there is some scientific background for numerical model approaches, and some submodels have been proposed. Because of its multidisciplinary character a synthesized approach is still lacking. Within trout farming this work attempts to establish the different submodels and outlines future possibilities for synthesizing the knowledge to a numerical model.

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