Biosorption studies on copper (II) and cadmium (II) using pretreated rice straw and rice husk

Li, Wai Chin; Law, F. Y.; Chan, Yat Hung

doi:10.1007/s11356-015-5081-7

Cited by 48 publications

(29 citation statements)

References 73 publications

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“…However, the plotting of 1/qe against 1/Ce values presented in Figure 5(b) for the Langmuir model offered an R 2 of 0.7148. The correlation coefficient (R 2 ) indicated the compliance of the isotherm models with the experimental data (Li et al, 2017). Hence, these indicated that the Langmuir isotherm model was less adequate in describing the relationship between adsorption capacity and their equilibrium concentration.…”

Section: Adsorption Isothermmentioning

confidence: 99%

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Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator

Neamhom¹

2019

Environ. Nat. Resour. J.

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This work investigated groundwater iron adsorption capacity from rice husk, rice straw, water hyacinth and coconut shell, agricultural residues commonly found in Thailand. This study also investigated the adsorption behavior using an appropriate isotherm model in the batch process. The process was conducted using a modified airlift tray aerator. The use of a single adsorbent plate in a modified aerator obtained a removal capacity in the range of 0.3 to 0.9 mg/L, but the final iron concentration in the sample was above the regulatory standard. To increase the efficiency using the equivalent condition, the multiple adsorbent plate system was tested. The application of four rice husk plates achieved the allowance value and resulted in a final iron concentration of 0.28 mg/L. Based on the results, iron was reduced by increasing the number of adsorbent plates. Hence, rice husk can be sustainably used to adsorb iron in groundwater. At equilibrium, the adsorption isotherm was fitted to the Freundlich equation with an R 2 value of 0.9805. This implied that the adsorption sites on the rice husk surface are heterogeneous in nature and presented a strong interaction between iron and rice husk. They revealed a maximum adsorption capacity of 0.73 mg/g. Moreover, this practice also decreased the amount of total hardness which could help alleviate nuisance and public health problems.

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Section: Adsorption Isothermmentioning

confidence: 99%

“…Then RS was washed and neutralized to around pH 7 using HCl solution. Cleaned RS was dried in an oven at 80 o C for 24 h before use (Li et al, 2017;Nam et al, 2018). Purified RS was meshed to set a homogeneous size of 2.5 mm.…”

Section: Rice Straw (Rs)mentioning

confidence: 99%

Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator

Neamhom¹

2019

Environ. Nat. Resour. J.

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“…In addition to large amounts of SiO2, The rice straw consists mainly of lignin, hemicellulose, cellulose, extractives, mineral ash and water, ( Li et al 2017). The lignin can interact promptly with cations, idea exchanging with protons and chelating with the metal ion, ( Rocha et al 2009).…”

Section: (A) (B) (C) Figure 4 Sem Images Of the Rice Straw (Rs) At Tmentioning

confidence: 99%

Unmodified Rice Straw for The Lead Removal Approach from Synthetic Lead Solution

Saad¹,

Amer

Tayeb³

et al. 2020

Alexandria Science Exchange Journal

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Lead, is the most common toxic metal that causing damage to the environment and human health due to its accumulation and persistence in the environment. The possibility of using biosorption unmodified rice straw (RS) was studied to eliminate lead ions from synthetic industrial wastewater. The impact of the initial concentration for lead (5-200 mg/l) and the contact time (10-120 min) were studied at 25°C and pH 5 of stirring solutions. Different analytical techniques such as Scanning Electron Microscope (SEM), Energy dispersive X-ray (EDX), and Fourier-transform infrared spectroscopy (FTIR) were used to figure out the change of rice straw adsorption capacity Moreover, The kinetic models pseudo-first and secondorder and both of Freundlich and Langmuir isotherm models have been tested. The results obtained show a significant removal of the lead content by approximately 94 % using unmodified rice straw (RS). Adsorption data was fitted with Freundlich isotherm model and pseudo-second order kinetics for unmodified rice straw

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“…It is important to note that arsenic (As) is a metalloid and selenium (Se) is a nonmetal, however, the term "heavy metal" will be used for the description of the elements studied in this paper. Although trace concentration of some of these elements (Fe, Cu, Cr, Zn, Se, Mn, Ni) are vital for some biochemical processes and physiological functions, they can persist in the environment and can cause serious health problems even at low concentrations (Ali et al, 2016;Amuda et al, 2007;Aremu et al, 2002;Chowdhury et al, 2016;Gautam et al, 2014;Karadag, 2008;Koubaissy et al, 2014;Li et al, 2017;Sencan et al, 2015;Wan Ngah and Hanafiah, 2008;Wang and Chen, 2006).…”

Section: Introductionmentioning

confidence: 99%

Potential Use of Hazelnut Processing Plant Wastes as a Sorbent for the Simultaneous Removal of Multi-Elements From Water

Dede

2019

Mühendislik Bilimleri Ve Tasarım Dergisi

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In this paper, the effects of pH (1.5-8.0), initial element concentration (0.5 to 20 mg L −1 .) and sorbent dosage (1-20 g L-1) were investigated on the potential use of hazelnut processing plant wastes, hazelnut shell (SH) and hazelnut skin (SK), for the simultaneous removal of Al, Cr, Cu, Cd, Pb, As and Fe from water. The surface morphology of the sorbents, elemental analysis, FTIR, SEM-EDS and BET analysis were performed and specific surface areas of the sorbents were found as 0.676 m 2 g-1 (for SH) and 0.768 m 2 g-1 (for SK). The results showed that surfaces of both sorbents are rough, contains pores that allow to entrap heavy metals and functional groups such as carboxylic acid, phenolic compounds, etc. to which the heavy metal ions can attach. While the optimum pH was determined as 5.0 for all elements in both sorbent systems, the percent removal of heavy metal increased with increase in initial heavy metal concentration up to 8 mg L-1 (except cadmium for SH and copper and cadmium for SK). While optimum sorbent dosage was obtained 10 g L-1 for SH sorbent, increase of sorbent amount led to a decrease of the percentage of removal for SK. Adsorption models were used for the mathematical description of adsorption equilibrium and isotherm constants were evaluated at room temperature (22 ± 2 •C). The adsorption equilibrium data were fitted well to Langmuir and Langmuir-Freundlich models in most cases and showed favorable adsorption behavior

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Biosorption studies on copper (II) and cadmium (II) using pretreated rice straw and rice husk

Cited by 48 publications

References 73 publications

Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator

Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator

Unmodified Rice Straw for The Lead Removal Approach from Synthetic Lead Solution

Potential Use of Hazelnut Processing Plant Wastes as a Sorbent for the Simultaneous Removal of Multi-Elements From Water

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