scholarly journals Rice husk as a potentially low-cost biosorbent for heavy metal and dye removal: an overview

Desalination ◽  
2005 ◽  
Vol 175 (3) ◽  
pp. 305-316 ◽  
Author(s):  
T.G. Chuah ◽  
A. Jumasiah ◽  
I. Azni ◽  
S. Katayon ◽  
S.Y. Thomas Choong
Keyword(s):  
Heavy Metal ◽  
Rice Husk ◽  
Dye Removal ◽  
Low Cost

scholarly journals Evaluation of Enhancement Factor for Removal of Heavy Metal Ions from Water through Adsorption by Non-Activated and Activated Carbon Prepared from Rice Husk

2021 ◽  
Vol 64 (3) ◽  
pp. 206-213
Author(s):  
Muhammad Irfan ◽  
Amir Shafeeq ◽  
Tahir Saleem Nasir ◽  
Farzana Bashir ◽  
Tausif Ahmad ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Ions ◽  
Rice Husk ◽  
Enhancement Factor ◽  
Heavy Metal Ions ◽  
Low Cost ◽  
Chemical Activation ◽  
Volatile Matter ◽  
Waste Biomass

Removal of heavy metal ions (HMI) from water streams is desirable due to their toxic and carcinogenic effects. Therefore, this study was conducted to prepare a low cost adsorbent in the form of non-activated carbon (NAC) and activated carbon (AC) using rice husk, a local bio-waste material. Activation of material was performed by base leaching, chemical activation using ZnCl2, followed by acid washing. The initial and final concentrations of HMI in water were measured using Atomic Absorption Spectroscopy. Volatile matter, ash, moisture and surface area of the prepared material were measured using ASTM methods E 897- 88 R04, E 830 - 87 R04, E 949 - 88 R04 and D 1050 - 1 respectively. An enhancement factor was used to evaluate the activating effect of the adsorbent. Maximum % age removal of HMI was measured as 69.0, 64.0, 62.0 and 56% for Ni, Cd, Zn and Pb respectively using NAC. However, by using AC, a significant increase in the %age removal efficiency of HMI was observed and measured as 99.0, 95.5, 93.0 and 89% for Ni, Cd, Zn and Pb respectively. The results showed that AC derived from waste biomass is a simple, ecological and cost-effective approach to remove bulk of metal ions from water and wastewater.  

scholarly journals Spent Coffee Ground as Low-Cost Adsorbent for Congo Red Dye Removal from Aqueous Solution

2021 ◽  
Vol 765 (1) ◽  
pp. 012089
Author(s):  
R Taufik ◽  
M Mohamad ◽  
R Wannahari ◽  
N F Shoparwe ◽  
WHW Osman ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Dye Removal ◽  
Low Cost ◽  
Congo Red Dye ◽  
Spent Coffee Ground ◽  
Coffee Ground ◽  
Red Dye

scholarly journals Preparation and Characterization of High-Efficiency Magnetic Heavy Metal Capture Flocculants

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1732
Author(s):  
Yuanyuan Yu ◽  
Yongjun Sun ◽  
Jun Zhou ◽  
Aowen Chen ◽  
Kinjal J. Shah
Keyword(s):  
Heavy Metal ◽  
Reaction Time ◽  
High Efficiency ◽  
Removal Rate ◽  
Low Cost ◽  
Monomer Concentration ◽  
Synthesis Process ◽  
Response Surface Optimization ◽  
Metal Capture ◽  
Total Monomer Concentration

In this study, a high-efficiency magnetic heavy metal flocculant MF@AA was prepared based on carboxymethyl chitosan and magnetic Fe3O4. It was characterized by SEM, FTIR, XPS, XRD and VSM, and the Cu(II) removal rate was used as the evaluation basis for the preparation process. The effects of AMPS content, total monomer concentration, photoinitiator concentration and reaction time on the performance of MF@AA flocculation to remove Cu(II) were studied. The characterization results show that MF@AA has been successfully prepared and exhibits good magnetic induction characteristics. The synthesis results show that under the conditions of 10% AMPS content, 35% total monomer concentration, 0.04% photoinitiator concentration, and 1.5 h reaction time, the best yield of MF@AA is 77.69%. The best removal rate is 87.65%. In addition, the response surface optimization of the synthesis process of MF@AA was performed. The optimal synthesis ratio was finally determined as iron content 6.5%, CMFS: 29.5%, AM: 53.9%, AMPS: 10.1%. High-efficiency magnetic heavy metal flocculant MF@AA shows excellent flocculation performance in removing Cu(II). This research provides guidance and ideas for the development of efficient and low-cost flocculation technology to remove Cu(II) in wastewater.

Biochar as a Low-Cost Adsorbent for Aqueous Heavy Metal Removal: A Review

2021 ◽  
pp. 105081
Author(s):  
Bingbing Qiu ◽  
Xuedong Tao ◽  
Hao Wang ◽  
Wenke Li ◽  
Xiang Ding ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Low Cost ◽  
Heavy Metal Removal

scholarly journals Rapid removal of heavy metal ions from aqueous solutions by low cost adsorbents

2012 ◽  
Vol 12 (2/3/4) ◽  
pp. 318 ◽  
Author(s):  
Ali Ahmadpour ◽  
Tahereh Rohani Bastami ◽  
Masumeh Tahmasbi ◽  
Mohammad Zabihi
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Low Cost ◽  
Rapid Removal

Highly sensitive detection of Cr(vi) in groundwater by bimetallic NiFe nanoparticles

2017 ◽  
Vol 9 (6) ◽  
pp. 1031-1037 ◽  
Author(s):  
Jingtao Liu ◽  
Yu Ding ◽  
Lifei Ji ◽  
Xin Zhang ◽  
Fengchun Yang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Hexavalent Chromium ◽  
Low Cost ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Toxic Heavy Metal ◽  
Metal Pollutants ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Heavy Metal Pollutants

Hexavalent chromium (Cr(vi)) is one of the most toxic heavy metal pollutants in groundwater, and thus the detection of Cr(vi) with high sensitivity, accuracy, and simplicity and low cost is of great importance.

Heavy Metal Removal by Oil Palm Empty Fruit Bunches (OPEFB) Biosorbent

2014 ◽  
Vol 625 ◽  
pp. 889-892 ◽  
Author(s):  
Safoura Daneshfozoun ◽  
Bawadi Abdullah ◽  
Mohd Azmuddin Abdullah
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Removal ◽  
Low Cost ◽  
Ph Dependence ◽  
Heavy Metal Removal ◽  
Absorption Spectrometry ◽  
Adsorption Efficiency ◽  
Empty Fruit Bunches ◽  
Initial Ph

This study developed an effective and economical physical pretreatment of OPEFB to be used as biosorbent for the removal of heavy metal ions such as Cu+2, Zn+2and Pb2+. The effects of fibres sizes, metal ions concentration (100-1000 ppm), initial pH (4-10) and contact time (20-150 min) were investigated in batch system. Samples were characterized with Atomic Absorption Spectrometry (AAS), Transmission Electron Microscopy (TEM) and Fourier Transmission Infra-red Spectroscopy (FTIR). Results showed pH-dependence adsorption efficiency and increased adsorption with initial metal concentrations where more than 92% adsorption efficiency achieved. We have successfully developed an eco-friendly, low cost adsorbent without any chemical modification or excessive energy disposal.

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