Stabilized landfill leachate treatment by sugarcane bagasse derived activated carbon for removal of color, COD and NH3-N – Optimization of preparation conditions by RSM

Azmi, Nurshazwani Bt.; Bashir, Mohammed J.K.; Sethupathi, Sumathi; Lim, Jun Wei; Aun, Ng Choon

doi:10.1016/j.jece.2014.12.002

Cited by 87 publications

(17 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among the various treatment methods, an adsorption process using activated carbon (AC) is recognized to be useful in treating leachate and also has been proven cost‐effective in the adsorption of contaminants present in LL …”

Section: Introductionmentioning

confidence: 99%

“…17 Among the various treatment methods, an adsorption process using activated carbon (AC) is recognized to be useful in treating leachate and also has been proven cost-effective in the adsorption of contaminants present in LL. 18 AC adsorption is very effective in removing complex organic compounds from LL, resulting in increased biodegradability and reduced toxicity after treatment. 19 Due to its abundance and availability, agricultural wastesuch as pine nut shell, 20 coconut shell 21 and apricot stone 22 is being used extensively as a low-cost precursor in the preparation of AC.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Poblete

Cortés

Bakit

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

This study focuses on the removal of organic pollutants present in landfill leachate (LL) using an adsorption process with activated carbon (AC) obtained from fish scales, and subsequently evaluates the reduction of toxicity in the wastewater obtained from the process. The AC obtained is a mesoporous material, with a cumulative pore area of 1.57 m2 g−1, Brunauer–Emmett–Teller (BET) of 1.8329 m2 g−1 and adsorption average pore width of 12.79833 nm. The maximum removal of pollutants was achieved at natural pH (6.71) of the LL, with a load of 3 g L−1, resulting in 60.1% colour and 37.3% chemical oxygen demand (COD). The rate of COD removal per g of AC increase had a maximum value of 5.6 at pH 10 when passing from 0.5 to 1 g AC. The lowest rate of 0.6 occurred for the same pH when it passed from 1 to 2 g AC. At pH 3 the second lowest rate of 3.3 was observed when passing from 2 to 3 g AC. At pH 3 there was always an increase in the rate as more AC was added. Conversely, at natural pH 6.71 the rate tended to decrease. At pH 10 the rate first decreased and then increased. At acidic pH, because it is the one with the lowest COD removal, it would be expected that by adding more AC the rate would continue to increase as there are easily accessible sites still available. Langmuir isotherms fitted adequately with the experimental data, providing an R2 of 0.9657, which is consistent with a monolayer adsorption pattern. The LL before the adsorption process had an inhibition ratio of 20.4%, due to the fact that leachate can be toxic because of the presence of hazardous organic compounds. After adsorption processes at pH 6.71, the inhibition ratios were 16.9%, 13.8%, 12.2% and 10.9% at AC loads of 0.5, 1, 2 and 3 g L−1, respectively, due to decreasing COD and colour of the LL over the course of the treatment. It was observed that the reduction of the inhibition ratio was greater at higher loads of adsorbent. © 2020 Society of Chemical Industry

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Poblete

Cortés

Bakit

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…F ‐value is the ratio between variance of the group means and mean of the within group variances. While the p ‐value is the probability of obtaining a result equal to or as extreme as the one that was practically observed when the null hypothesis is true . The value of p < 0.05 indicates that the model is significant whereas p > 0.1 is not significant.…”

Section: Resultsmentioning

confidence: 99%

“…The CCD gives 2 n factorial runs, 2n axial runs, and c p replicate numbers of the central runs, where n indicates the number of independent variables. Three independent variable factors were tested, therefore the design matrix contained total 20 experiments (Total experiments = 2 n + 2n + c p = 2 3 + 2(3) + 6 = 20) . The independent variables were methanation temperature, %humidity, and weight of the catalyst.…”

Section: Methodsmentioning

confidence: 99%

CO₂ methanation over Ni and Rh based catalysts: Process optimization at moderate temperature

et al. 2018

Self Cite

View full text Add to dashboard Cite

Summary H2 was produced from aluminum/water reaction and reacted with CO2 over Ni and Rh based catalysts to optimize the process conditions for CO2 methanation at moderate temperature. Monometallic catalysts were prepared by incorporating Ni and Rh using nickel nitrate hexahydrate (Ni(NO3)2·6H2O) and rhodium(III) chloride trihydrate (RhCl3·3H2O)as a precursor chemical. The preliminary study of the catalysts revealed higher activity and CH4 selectivity for Rh based catalyst compared to that of Ni based catalyst. Further, Rh based catalyst was investigated using response surface methodology (RSM) involving central composite design. The quadratic model was employed to correlate the effects of variable parameters including methanation temperature, %humidity, and catalyst weight with the %CO2 conversion, %CH4 selectivity, and CH4 production capacity. Analysis of variance revealed that methanation temperature and humidity play an important role in CO2 methanation. Higher response values of CO2 conversion (54.4%), CH4 selectivity (73.5%) and CH4 production capacity (8.4 μmol g−1 min−1) were noted at optimum conditions of 206.7°C of methanation temperature, 12.5% humidity and 100 mg of the catalyst. The results demonstrated the ability of Rh catalyst supported on palm shell activated carbon (PSAC) for CO2 methanation at low temperature and atmospheric pressure.

show abstract

“…The collected raw sugarcane bagasse precursors were cut into small pieces, boiled and washed thoroughly to eliminate the impurities according to the method proposed by Azmi et al [10]. Then, the sugarcane bagasse was dried in the oven to the constant weight at the temperature of 104-105ºC to discard the moisture.…”

Section: Sugarcane Bagasse Derived Adsorbents Preparationmentioning

confidence: 99%

Modifications of sugarcane bagasse-derived adsorbents to enhance the adsorption of microalgae biomass in easing harvesting process

Basri

Lim

Isa

et al. 2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. Recently, the attempt to create adsorbents in solving various separation problems has intensified drastically. The proposal of present research lightens the way to enhance the microalgae biomass harvesting process with the addition of sugarcane bagasse-derived adsorbent in culture medium. The adsorbents were tested with several chemical activations and concentrations to determine the optimum ones. Acid modified adsorbents with concentration of 1.0M and 1.5M demonstrated the highest adsorption with attainable biomass adsorption capacities 66% for both. The samples viewed under SEM showed 1.0M and 1.5M acid modified adsorbents have highest microalgae adsorption.

show abstract

Stabilized landfill leachate treatment by sugarcane bagasse derived activated carbon for removal of color, COD and NH3-N – Optimization of preparation conditions by RSM

Cited by 87 publications

References 27 publications

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

CO₂ methanation over Ni and Rh based catalysts: Process optimization at moderate temperature

Modifications of sugarcane bagasse-derived adsorbents to enhance the adsorption of microalgae biomass in easing harvesting process

Contact Info

Product

Resources

About

Stabilized landfill leachate treatment by sugarcane bagasse derived activated carbon for removal of color, COD and NH3-N – Optimization of preparation conditions by RSM

Cited by 87 publications

References 27 publications

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

CO2 methanation over Ni and Rh based catalysts: Process optimization at moderate temperature

Modifications of sugarcane bagasse-derived adsorbents to enhance the adsorption of microalgae biomass in easing harvesting process

Contact Info

Product

Resources

About

CO₂ methanation over Ni and Rh based catalysts: Process optimization at moderate temperature