The effect of KOH activation and Ag nanoparticle incorporation on rice husk-based porous materials for wastewater treatment

Chemosphere ◽  
2021 ◽  
pp. 132760
Author(s):  
Nazia Hossain ◽  
Sabzoi Nizamuddin ◽  
Periasamy Selvakannan ◽  
Gregory Griffin ◽  
Srinivasan Madapusi ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Porous Materials ◽  
Rice Husk ◽  
Koh Activation ◽  
Ag Nanoparticle

scholarly journals A study on the potential of carbon residue from rice husk used as boiler fuel for carbon dioxide capture and wastewater treatment

2019 ◽  
Vol 268 ◽  
pp. 04006
Author(s):  
Janssen Radley Peñaflor ◽  
Airic James Carillo ◽  
Samuel Elijah Estrada ◽  
Jhulimar Celedonio-Castro
Keyword(s):  
Carbon Dioxide ◽  
Methylene Blue ◽  
Wastewater Treatment ◽  
Rice Husk ◽  
Carbon Dioxide Capture ◽  
Agricultural Waste ◽  
Paper Industry ◽  
Carbon Residue ◽  
Adsorptive Capacity ◽  
Boiler Fuel

Adsorption process both in post carbon dioxide capture and wastewater treatment has been receiving widespread attention over the past decades as a mitigating technology for climate change and water pollution, respectively. With this increasing interest in adsorption processes to address environmental concerns, development of an adsorbent with not just high adsorptive capacity but which is also low cost is of great interest among researchers. In this study, an agricultural waste which was already utilized as a boiler fuel in a paper industry was investigated for its potential as an adsorbent for both carbon dioxide capture and wastewater treatment. Specifically, the CO2 and methylene blue adsorption capacity of carbon residue from rice husk used as boiler fuel was determined and was compared with a biochar synthesized from rice husk. Furthermore, Scanning Electron Microscope (SEM) and Thermogravimetric analysis (TGA) were used for the characterization of the adsorbents. Results showed that the carbon residue can be a potential adsorbent for both applications with about 0.5 wt% CO2 adsorption and 100% removal of the methylene blue.

scholarly journals Waste phenolic resin derived activated carbon by microwave-assisted KOH activation and application to dye wastewater treatment

2019 ◽  
Vol 8 (1) ◽  
pp. 408-415 ◽  
Author(s):  
Wenhai Hu ◽  
Song Cheng ◽  
Hongying Xia ◽  
Libo Zhang ◽  
Xin Jiang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Surface Area ◽  
Adsorption Isotherms ◽  
Phenolic Resin ◽  
Bet Surface Area ◽  
Isotherm Models ◽  
Koh Activation ◽  
Activation Process ◽  
Dye Wastewater

Abstract The waste phenolic resin was utilized as the raw material to prepare activated carbon (AC) used KOH as the activating agent via microwave heating. The phenolic resin was carbonized at 500°C and then performed with a KOH/Char ratio of 4 and microwave power of 700 W for a duration of 15 min. The physic-chemical characteristics of the AC were characterized by N2 adsorption instrument, FTIR, SEM and TEM. The BET surface area and pore volume of AC were found to be 4269 m2/g and 2.396 ml/g, respectively. The activation process to generate such a phenomenally high surface area of the AC has little reported in open literatures and could pave way for preparation adsorbents that are far superior to the currently marketed adsorbents. The methylene blue (MB) was used as the model to assess its suitability to dye wastewater treatment. Towards this, the MB adsorption isotherms were conducted at three different temperatures and tested with different adsorption isotherm models. The adsorption isotherms could be modeled using Langmuir isotherm. While the kinetics could be used the pseudo-second order kinetics to describe. Thermodynamic results demonstrated that the adsorption process was a spontaneous, as well as an endothermic.

Crofton weed derived activated carbon by microwave-induced KOH activation and application to wastewater treatment

2016 ◽  
Vol 23 (6) ◽  
pp. 1597-1607 ◽  
Author(s):  
Song Cheng ◽  
Libo Zhang ◽  
Hongying Xia ◽  
Shengzhou Zhang ◽  
Jinhui Peng ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Koh Activation ◽  
Crofton Weed

scholarly journals Preparation and characterization of activated carbon & amorphous silica from rice husk

2015 ◽  
Vol 50 (4) ◽  
pp. 263-270 ◽  
Author(s):  
MT Rhaman ◽  
MA Haque ◽  
MA Rouf ◽  
MAB Siddique ◽  
MS Islam
Keyword(s):  
Activated Carbon ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Ph Value ◽  
Koh Activation ◽  
Silica Sample ◽  
Alkali Extraction ◽  
Sem Image ◽  
Value Measurement ◽  
Mb Adsorption

Activated carbon (AC) was prepared by the conventional carbonization and KOH activation and amorphous silica was extracted by alkali extraction followed by acid precipitation from rice husk on a laboratory scale. The performance of the produced activated carbon and amorphous silica were examined using I2 value measurement, methylene blue (MB) adsorption test, pH measurement, FTIR and SEM-EDX analysis. The optimum temperature for production of AC was obtained at 700 0C. The AC by alkali extraction method was show higher activity than KOH activation. The maximum I2 value, MB adsorption value & pH value shows at 700 0C followed by alkali extraction with 15% NaOH, which were 510.82 mg/g, 61.1 mg/g and 7.32 respectively. The FTIR analysis shows presence of Si-O-Si bond with a strong peak at 1078.28 cm-1. The SEM image of silica sample shows that the most of organic component is burnt out during combustion.Bangladesh J. Sci. Ind. Res. 50(4), 263-270, 2015

Biochar from microwave pyrolysis of rice husk for tertiary wastewater treatment and soil nourishment

2019 ◽  
Vol 235 ◽  
pp. 1073-1079 ◽  
Author(s):  
Neha Shukla ◽  
Diptiprakash Sahoo ◽  
Neelancherry Remya
Keyword(s):  
Wastewater Treatment ◽  
Rice Husk ◽  
Microwave Pyrolysis

Paraquat adsorption on porous materials synthesized from rice husk silica

2013 ◽  
Vol 68 (4) ◽  
pp. 863-869 ◽  
Author(s):  
Wina Rongchapo ◽  
Onsulang Sophiphun ◽  
Kamolwan Rintramee ◽  
Sanchai Prayoonpokarach ◽  
Jatuporn Wittayakun
Keyword(s):  
Porous Materials ◽  
Rice Husk ◽  
Langmuir Model ◽  
Blue Dye ◽  
Maximum Adsorption Capacity ◽  
Rice Husk Silica ◽  
Zeolite Nay ◽  
Commercial Grade ◽  
Efficient Adsorbent ◽  
Mcm 41

The goal of this work was to utilize rice husk silica (RHS) and porous materials synthesized with RHS, including mesoporous material (MCM-41) and microporous materials (zeolite NaY and NaBEA), for adsorption of herbicide paraquat. The adsorption occurred although cation exchange and the capacity decreased in the following order: NaY > NaBEA > MCM-41 > RHS, consistent with the amount of Al. The adsorption on all adsorbents fitted well with the Langmuir model and the maximum adsorption capacity of 185.2 mg/g-adsorbent was obtained on NaY. In addition, blue dye in commercial grade paraquat did not interfere with paraquat adsorption. Although MCM-41 was the most efficient adsorbent for the blue dye, RHS was favorable in terms of production cost. A mixture of NaY and RHS is recommended for simultaneous adsorption of paraquat and blue dye.

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