Adsorption of heavy metal ions from aqueous solution by carboxylated cellulose nanocrystals

Yu, Xiaolin; Tong, Shengrui; Ge, Maofa; Wu, Lingyan; Zuo, Junchao; Cao, Changyan; Song, Weiguo

doi:10.1016/s1001-0742(12)60145-4

Cited by 396 publications

(188 citation statements)

References 46 publications

Supporting

Mentioning

173

Contrasting

Unclassified

Order By: Relevance

“…Chemical modification of cellulose by grafting of functional groups has the potential to improve its adsorption capacity and to enhance its performance under desired conditions. Carboxylic acid groups are one example of a functional group that can be introduced onto the cellulose surface by (TEMPO)-mediated oxidation and this oxidized cellulose adsorbent has been shown to be capable of adsorbing 465.1 mg/g Pb(II) from aqueous solution (Yu et al, 2013). However, only limited work has been published on using cellulose nanowhiskers (CNWs) as an adsorbent, as the majority of the literature has mainly focused on macroscopic lignocellulosic biomass such as jute, orange peel, wood sawdust, wood pulp and sugarcane bagasse fibres, rather than pure cellulose (Reddy, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…However, the reported modification process using succinic anhydride as an active agent was time consuming and not very sustainable as this process required 12 h under pyridine reflux in order to obtained the final modified adsorbent (Yu et al, 2013). Moreover, pyridine is a well known problem in the chemical industry and is avoided as much as possible as it may cause harmful health effects (U.S. Public Health Service, 1992).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Predicting the capability of carboxylated cellulose nanowhiskers for the remediation of copper from water using response surface methodology (RSM) and artificial neural network (ANN) models

Hamid

Jenidi

Thielemans

et al. 2016

Industrial Crops and Products

View full text Add to dashboard Cite

This study observed the influence of temperature, initial Cu(II) ion concentration, and sorbent dosage on the Cu(II) removal from the water matrix using surface-oxidized cellulose nanowhiskers (CNWs) bearing carboxylate functionalities. In addition, this study focused on the actual conditions in a wastewater treatment plant. Conductometric titration of CNWs suspensions showed a surface charge of 54 and 410 mmol/kg for the unmodified and modified CNWs, respectively, which indicated that the modified CNWs provide a relatively high surface area per unit mass than the unmodified CNWs. In addition, the stability of the modified CNWs was tested under different conditions and proved that the functional groups were permanent and not degraded. Response surface methodology (RSM) and artificial neural network (ANN) models were employed in order to optimize the system and to create a predictive model to evaluate the Cu(II) removal performance of the modified CNWs. The performance of the ANN and RSM models were statistically evaluated in terms of the coefficient of determination (R 2 ), 2 absolute average deviation (AAD), and the root mean squared error (RMSE) on predicted experiment outcomes. Moreover, to confirm the model suitability, unseen experiments were conducted for 14 new trials not belonging to the training data set and located both inside and outside of the training set boundaries. Result showed that the ANN model (R 2 =0.9925, AAD = 1.15%, RMSE = 1.66) outperformed the RSM model (R 2 =0.9541, AAD = 7.07%, RMSE = 3.99) in terms of the R 2 , AAD, and RMSE when predicting the Cu (II) removal and is thus more reliable. The Langmuir and Freundlich isotherm models were applied to the equilibrium data and the results revealed that Langmuir isotherm (R 2 = 0.9998) had better correlation than the Freundlich isotherm (R 2 = 0.9461). Experimental data were also tested in terms of kinetics studies using pseudo-first order and pseudo-second order kinetic models. The results showed that the pseudo-second-order model accurately described the kinetics of adsorption.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predicting the capability of carboxylated cellulose nanowhiskers for the remediation of copper from water using response surface methodology (RSM) and artificial neural network (ANN) models

Hamid

Jenidi

Thielemans

et al. 2016

Industrial Crops and Products

View full text Add to dashboard Cite

show abstract

“…They tend to accumulate themself in living organisms leading to various diseases and disorder. Lead and cadmium are considered the most toxic heavy metals ions which impose serious health issues [9]. High exposure from Lead can potentially lead to encephalopathy, cognitive impairment, behavioural disturbances, kidney damage, anaemia and toxicity to the reproductive system.…”

Section: Introductionmentioning

confidence: 99%

“…With its long term exposure, it may cause bone damage [8]. Based on World Health Organization (WHO), the permissible limit in waste water for lead is 0.015 mg/L and cadmium is 0.01 mg/L [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

NanoCrystalline Cellulose isolated from oil palm empty fruit bunch and its potential in cadmium metal removal

Lim

Chew

Choong

et al. 2016

MATEC Web of Conferences

View full text Add to dashboard Cite

Abstract. NanoCrystalline Cellulose (NCC) was isolated via ultrasonic cavitation assisted acid hydrolysis method. Characterization was done using Dynamic Light Scattering (DLS) together with Scanning Electron Microscope (SEM) imaging to double prove the existence of NCC. DLS measures length of 236.6 nm with width of 34.40 nm, supported by SEM which showed NCC a rod-like shaped particle with large surface area and high porosity. It was then attempted for heavy metal cadmium ion (Cd 2+ ) removal from aqueous solution. The pH implication to the rate of Cd 2+ adsorption was investigated by varying the solution to pH 4, pH 7 and pH 10 over a duration of 120 minutes. The removal efficiency was analyzed using Atomic Absorption Spectroscopy (AAS) resulting in pH 7 being the most favorable for Cd 2+ removal.

show abstract

Cellulose: A Smart Material for Water Purification

Arora

Choi

Shiratani

et al. 2016

Smart Materials for Waste Water Applications

View full text Add to dashboard Cite

Adsorption of heavy metal ions from aqueous solution by carboxylated cellulose nanocrystals

Cited by 396 publications

References 46 publications

Predicting the capability of carboxylated cellulose nanowhiskers for the remediation of copper from water using response surface methodology (RSM) and artificial neural network (ANN) models

Predicting the capability of carboxylated cellulose nanowhiskers for the remediation of copper from water using response surface methodology (RSM) and artificial neural network (ANN) models

NanoCrystalline Cellulose isolated from oil palm empty fruit bunch and its potential in cadmium metal removal

Cellulose: A Smart Material for Water Purification

Contact Info

Product

Resources

About