N-Doped biochar derived from co-hydrothermal carbonization of rice husk and Chlorella pyrenoidosa for enhancing copper ion adsorption

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 53713-53722 ◽  
Author(s):  
Chao Gai ◽  
Yanchuan Guo ◽  
Nana Peng ◽  
Tingting Liu ◽  
Zhengang Liu
Keyword(s):  
Rice Husk ◽  
Copper Ion ◽  
Chlorella Pyrenoidosa ◽  
Hydrothermal Carbonization ◽  
Ion Adsorption ◽  
Hydrothermal Environment

Biochar derived from rice husk was modified by microalgae Chlorella pyrenoidosa as a natural nitrogen-rich precursor in a hydrothermal environment for copper ion (Cu(ii)) adsorption.

scholarly journals Biocomposite of Hydroxyapatite from Chicken Egg Shells and Biochar from Rice Husk As an Adsorbent for Copper Ion and Methylene Blue

2020 ◽  
Vol 29 (1) ◽  
pp. 1
Author(s):  
Hendri Setiawan ◽  
Umi F. Anindi ◽  
Dedek Y Pulungan ◽  
Nur Akbar ◽  
Atiek R. Noviyanti ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Rice Husk ◽  
Copper Ion ◽  
Chicken Egg ◽  
Egg Shells

scholarly journals Synthesis and characterization of rice husk biochar via hydrothermal carbonization for wastewater treatment and biofuel production

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Nazia Hossain ◽  
Sabzoi Nizamuddin ◽  
Gregory Griffin ◽  
Periasamy Selvakannan ◽  
Nabisab Mujawar Mubarak ◽  
...  
Keyword(s):  
Rice Husk ◽  
Agricultural Waste ◽  
Value Added ◽  
Hydrothermal Carbonization ◽  
Catalytic Performance ◽  
Biofuel Production ◽  
Suspension Stability ◽  
Waste Biomass ◽  
Suitable Material ◽  
Rice Husk Biochar

Abstract The recent implication of circular economy in Australia spurred the demand for waste material utilization for value-added product generations on a commercial scale. Therefore, this experimental study emphasized on agricultural waste biomass, rice husk (RH) as potential feedstock to produce valuable products. Rice husk biochar (RB) was obtained at temperature: 180 °C, pressure: 70 bar, reaction time: 20 min with water via hydrothermal carbonization (HTC), and the obtained biochar yield was 57.9%. Enhancement of zeta potential value from − 30.1 to − 10.6 mV in RB presented the higher suspension stability, and improvement of surface area and porosity in RB demonstrated the wastewater adsorption capacity. Along with that, an increase of crystallinity in RB, 60.5%, also indicates the enhancement of the catalytic performance of the material significantly more favorable to improve the adsorption efficiency of transitional compounds. In contrast, an increase of the atomic O/C ratio in RB, 0.51 delineated high breakdown of the cellulosic component, which is favorable for biofuel purpose. 13.98% SiO2 reduction in RB confirmed ash content minimization and better quality of fuel properties. Therefore, the rice husk biochar through HTC can be considered a suitable material for further application to treat wastewater and generate bioenergy.

Preparation and characterization of porous chitosan–based membrane with enhanced copper ion adsorption performance

2020 ◽  
Vol 154 ◽  
pp. 104681 ◽  
Author(s):  
Nadia Sahebjamee ◽  
Mohammad Soltanieh ◽  
Seyed Mahmoud Mousavi ◽  
Amir Heydarinasab
Keyword(s):  
Copper Ion ◽  
Ion Adsorption ◽  
Adsorption Performance ◽  
Porous Chitosan

Studies on Copper Ion Adsorption Using Pectin/Functionalized-Silica Coated Cellulose

2015 ◽  
Vol 1131 ◽  
pp. 210-214
Author(s):  
Radchada Buntem ◽  
Thitiwat Tanyalax
Keyword(s):  
Hydrochloric Acid ◽  
Adsorption Capacity ◽  
Filter Paper ◽  
Copper Ion ◽  
Silica Sol ◽  
Ion Adsorption ◽  
Functionalized Silica ◽  
Solution Ph ◽  
Optimum Ph ◽  
Sem Micrograph

The pectin/functionalized silica coated filter paper (FILPSL2) was used for copper ion adsorption. Silica sol (1), prepared by mixing ethanol, water, TEOS and hydrochloric acid, was slowly added into pectin solution. A piece of filter paper (2 cm x 2 cm) was immersed in the silica-pectin solution for 1 hr. The coated filter paper was dried at room temperature and then oven-dried at 50 °C for 6 hrs to obtain FILPS. The silica sol (2) was subsequently prepared by mixing ethanol, water, N-[3-(Trimethoxysilyl) propyl] ethylenediamine (L2) and hydrochloric acid. The FILPS was immersed in silica sol (2) and the coated paper was oven-dried at 50 °C for 6 hrs to obtain FILPSL2. The SEM micrograph of uncoated Filter paper (FIL) and FILPSL2 showsa characteristic woven pattern. For copper ion adsorption, FILPSL2 was put into 0.1 M of CuCl2solution (pH 2, 25 °C). The color of the paper changes from off-white to intense blue within 5 min due to the complex between amino group of functionalized silica and Cu2+ as evidenced from IR spectroscopy.The equilibrium adsorption percentage and adsorption capacity were 27.10 and 5.5 x 10-3 respectively. The concentrations of copper ion solutions were varied to 10-2and 10-3M at this pH. The lower concentration of copper ion results in the higher adsorption percentage. While the lower concentration of copper ion results in the lower adsorption capacity. The adsorption was also experimented at pH 3.The similar trend was obtained. The optimum pH for adsorption for all concentrations was 2. The effect of interferences on the copper ion adsorption depends on the pH. At pH 2, Ni2+ has a stronger effect. While Cd2+ has a stronger effect at pH 3. The desorption was performed using 0.2 M CH3COOH solution. The complete desorption occurred within 30 min.

Preparation of organically functionalized silica gel as adsorbent for copper ion adsorption

2009 ◽  
Vol 21 (11) ◽  
pp. 1473-1479 ◽  
Author(s):  
Hongjie WANG ◽  
Jin KANG ◽  
Huijuan LIU ◽  
Jiuhui QU
Keyword(s):  
Silica Gel ◽  
Copper Ion ◽  
Ion Adsorption ◽  
Functionalized Silica

XANES Studies on the Oxidation States of Copper Ion in Silicate Glass

2017 ◽  
Vol 757 ◽  
pp. 9-13
Author(s):  
Kamolwan Samkongngam ◽  
Radchada Buntem
Keyword(s):  
Silicate Glass ◽  
Rice Husk ◽  
Glass Matrix ◽  
Copper Ion ◽  
Reducing Agent ◽  
Base Glass ◽  
Expansion Coefficients ◽  
Doped Glass ◽  
X Ray Absorption ◽  
Dark Blue

The silicate glass was prepared using rice husk as the source of silica. The base glass formula is composed of SiO2 (from rice husk ash), Na2CO3, K2CO3, ZnO, H3BO3, CaO and Al2O3 or Al. CuO was used as the colorant in the glass matrix in the absence and presence of reducing agent. The color of the glass obtained was varied from dark blue to blue depending on the amount of CuO and reducing agent. The expansion coefficients of copper doped glass are in the range of 12.43 x 10-6 - 14.35 x 10-6 (°C-1) which is common for the silicate glass. The finger prints of the bond vibrations were studied using IR spectroscopy. While the oxidation state and the coordination information of the copper ion in the glass matrix were investigated using X-ray absorption spectroscopy. In the absence and presence of reducing agent, Cu+ and Cu2+ exist in the glass matrix. However, in the presence of reducing agent, the amount of Cu+ in the glass matrix is higher.

Sign in / Sign up

Export Citation Format

Share Document