scholarly journals Ultrasonic Synthesis of Nanochitosan and Its Size Effects on Turbidity Removal and Dealkalization in Wastewater Treatment

Inventions ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 98
Author(s):  
Fitri Khoerunnisa ◽  
Yustika Desti Yolanda ◽  
Mita Nurhayati ◽  
Firdha Zahra ◽  
Muhamad Nasir ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wave Amplitude ◽  
Simple Technique ◽  
Irradiation Time ◽  
Chitosan Nanoparticles ◽  
Narrow Particle Size Distribution ◽  
Key Factors ◽  
Turbidity Removal ◽  
Ultrasonic Synthesis ◽  
Flocculation Process

A detailed study on the synthesis of chitosan nanoparticles under ultrasonication is reported in this paper. By using this simple technique, chitosan particles in nanometer range can be easily prepared without using any harmful and expensive chemicals. The results show that increasing the ultrasonic irradiation time and ultrasonic wave amplitude are the key factors for producing discrete chitosan nanoparticles with narrow particle size distribution. The resulting nanoparticles show superior turbidity removal efficiency (75.4%) and dealkalization (58.3%) in wastewater treatment than the bulk chitosan solid (35.4% and 11.1%, respectively), thus offering an eco-friendly and promising approach for treating wastewater via the coagulation/flocculation process.

scholarly journals Using experimental design for the screening and optimization of key factors on silica particles adsorption using magnetic nanoparticles – a case study of chemical mechanical polishing wastewater treatment

2017 ◽  
Vol 12 (3) ◽  
pp. 647-659 ◽  
Author(s):  
Chung-Fu Huang ◽  
An-Chi Huang ◽  
Feng-Jen Chu ◽  
Chia-Ling Lin ◽  
Terng-Jou Wan
Keyword(s):  
Wastewater Treatment ◽  
Magnetic Nanoparticles ◽  
Experimental Design ◽  
Chemical Mechanical Polishing ◽  
Removal Rate ◽  
Average Particle Size ◽  
Mechanical Polishing ◽  
Average Particle ◽  
Key Factors ◽  
Turbidity Removal

This study applied magnetic nanoparticles (MNPs) to chemical mechanical polishing wastewater treatment using experimental design (Plackett–Burman methods) to select the key factors among pH, mixing, Polyaluminum chloride dosage, settling time, MNPs dosage, and temperature and using response surface methodology (RSM) to determine the optimal values of key factors. Research results showed that the key factors influencing processing performance were pH and rpm, and the optimal conditions were a pH of 4.9 and rpm of 68. The turbidity removal rate through RSM simulation was 90%; under this parameter, the actual turbidity removal rate in the experiment was 89%, which was extremely close to the simulation value; this value was also much higher than the nonoptimized removal rate of 61 ± 8%. Additionally, in the subsequent regeneration and reuse experiment involving mixing and ultrasound for desorption and regeneration, the number of recoveries were 4 and 5, respectively. The study showed that the average particle size of MNPs following ultrasonic vibration was reduced; the effect was optimal at 23 to 15 nm. Therefore, a removal rate of over 80% could be maintained for the fifth ultrasonic regeneration, and the energy of the mixing method may not have been sufficient, causing incomplete desorption and a turbidity removal rate of only 71%.

APPLICATION OF THE FLOCCULATION PROCESS IN THE INDUSTRIAL WASTEWATER TREATMENT

2016 ◽  
Vol 15 (3) ◽  
pp. 521-526
Author(s):  
Narcis Barsan ◽  
Mariana Turcu ◽  
Emilian Mo.negu.u ◽  
Mihaela Dascalu ◽  
Dana Chitimus ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Industrial Wastewater Treatment ◽  
Flocculation Process

Treatment of Textile Wastewater using Biodegradable Flocculants of Chitosan and Extracted Pandan Leaves

2013 ◽  
Vol 64 (1) ◽  
Author(s):  
Norzita Ngadi ◽  
Nor Aida Yusoff
Keyword(s):  
Solvent Extraction ◽  
Extraction Method ◽  
Textile Wastewater ◽  
Settling Time ◽  
Turbidity Removal ◽  
Test Experiment ◽  
Jar Test ◽  
Solvent Extraction Method ◽  
Flocculation Process

The study investigated the performance of chitosan and extracted pandan leaves towards treatment of textile wastewater by using flocculation process. Pandan leaves were extracted by using solvent extraction method. Flocculation process was conducted using a Jar test experiment. The effect of dosage, pH, and settling time on reduction of COD, turbidity and color of textile wastewater was studied. The results obtained found that chitosan was very effective for reduction of COD, turbidity, color and indicator for color. The best condition for COD and turbidity removal was achieved at 0.2 g dosage, pH 4 and 60 minutes of settling time. Under this condition, about 58 and 99% of COD and turbidity was removed, respectively. However, the results obtained using extracted pandan was opposite compared to the chitosan. Extracted pandan was not able to remove both COD and turbidity of the waste. 

Characteristics of Chitosan Nanoparticles for Water and Wastewater Treatment

2017 ◽  
pp. 223-261 ◽  
Author(s):  
Cayla Cook ◽  
Veera Gnaneswar Gude
Keyword(s):  
Wastewater Treatment ◽  
Chitosan Nanoparticles ◽  
Antimicrobial Properties ◽  
Chemical Properties ◽  
Water And Wastewater Treatment ◽  
Coagulation And Flocculation ◽  
Recent Developments ◽  
Water And Wastewater ◽  
Physical And Chemical

Chitosan is a naturally occurring biopolymer originating from several microbial species as well as crustacean species, such as shrimp and lobster. Chitosan has excellent physical and chemical properties that allow its use in various environmental applications especially in water treatment. It is a biodegradable polymer, and it is inexpensive providing an environmentally friendly and economic option for water and wastewater treatment. Chitosan offers a myriad of applications through chemical coagulation and flocculation, antimicrobial properties, adsorption capabilities, and nanofiltration and can provide a sustainable route for water and wastewater treatment. This book chapter elaborates the recent developments in chitosan applications in water and wastewater treatment.

scholarly journals “Batik” Industry Wastewater Treatment via Coagulation-Flocculation Process and Adsorption Using Teak Sawdust Based Activated Carbon

2019 ◽  
Vol 8 (1) ◽  
pp. 08-13
Author(s):  
Prima Astuti Handayani ◽  
Umi Cholifah ◽  
Ria Ulviana ◽  
Achmad Chafidz
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Contact Time ◽  
Adsorption Process ◽  
Optimum Concentration ◽  
Water Stream ◽  
Untreated Wastewater ◽  
Flocculation Process ◽  
Industry Wastewater ◽  
Sequencing Process

Untreated wastewater of Batik industry can pollute the environment because it contains metal compound, COD, BOD, which are higher than the allowable values. Therefore, a treatment of this wastewater prior discharging to water stream (i.e. river) is very important. This research aims to investigate the use of Teak sawdust as activated carbon, and also the effect of adsorbent concentration, adsorption contact time, as well as coagulation-flocculation-adsorption sequencing process to the level of COD, BOD, and Zn in Batik wastewater. The Batik wastewater used for this research obtained from Batik industry in Rembang, which mostly used naphtol as the coloring agent. The wastewater was initially treated by coagulation-flocculation process, followed by adsorption process. The coagulant-flocculant used in this research was 1 g/L of alum and 3 g/L of lime. Whereas, the adsorbent used was activated carbon made from Teak sawdust with variation of concentrations: 10, 16, 23, and 26 g/L. Whereas, the adsorption contact times were 20, 40, 100, 160, and 220 minutes. The results showed that the coagulation-flocculation process was able to decrease the levels of COD, BOD, and Zn by 73.28%, 73.62%, and 79.21% respectively. Additionally, the adsorption process by activated carbon also further decreased the levels of COD, BOD, and Zn significantly. Based on the results, the optimum concentration of activated that gave the best result was 26 g/L with 220 minutes contact time. Overall, the combination of coagulation-flocculation and adsorption sequencing process was able to decrease the level of COD, BOD, and Zn up to 96.69%, 96.90%, and 91.90% respectively.

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