Certain Building Materials with Respect to Their Thermal Properties as Well as to Their Impact to Environment

Antonyová, Anna; Abdullah, Abd Halid; Nagapan, Sasitharan; Daud, Zawawi

doi:10.30880/ijie.2018.10.04.021

Cited by 8 publications

(9 citation statements)

References 8 publications

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“…COD is defined as the amount of oxygen required to completely oxidize organic constituents to carbon dioxide and water [17]. The decrease in BOD 5 /COD ratio results also in the decrease of treatment efficiency [18][19][20][21][22][23][24][25][26][27][28]. The findings of current study are in accordance with those stated in literature [6], [18].…”

Section: Optimum Ratio 321 Effect Of Different Ratio Towards Codsupporting

confidence: 87%

Adsorption Efficiency and Isotherms of COD and Color Using Limestone and Zeolite Adsorbents

Rosli

Daud²,

Awang³

et al. 2018

IJIE

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Leachate is a liquid generated due to rainwater percolation through the wastes in a landfill or dumping site that may contain high levels of organic matter including both biodegradable and non-biodegradable which major source of water pollution. In this research work, landfill leachate has been characterized and found to contain very high COD and color. Adsorption process was performed to find out the performance of different combinations ratio between limestone (LS) and zeolite (ZEO). The removal efficiencies of different ratios were examined for reduction of COD and color. The optimum mixture ratio of adsorbents (LS:ZEO) at 10:30 and 15:25 were found to be more effective in reducing COD and color respectively as compared with the use of individual media. The highest removal percentage were found at approximately 55% of COD and 76% of color with 120 minutes of contact time, 200 rpm in shaking speed at pH7. The Langmuir adsorption isotherm model exhibited a better fit with high correlation R 2 =0.9991 for COD and R 2 =0.9827 for (color) respectively, which implies that the adsorption of leachate in this study onto LS-ZEO is homogeneous with monolayer. It was observed that limestone and zeolite mixture provides an alternative medium for removing COD and color at a considerably lower cost.

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Section: Optimum Ratio 321 Effect Of Different Ratio Towards Codsupporting

confidence: 87%

Adsorption Efficiency and Isotherms of COD and Color Using Limestone and Zeolite Adsorbents

Rosli

Daud²,

Awang³

et al. 2018

IJIE

View full text Add to dashboard Cite

show abstract

“…The assayed removal values against the adsorbent dose were regressed against the pseudo-first-order and the pseudo-second-order kinetic equations. The pseudo-firstorder model is based on the assumption that the solubility rate with time is directly proportional to the saturation concentration and the absorbed amount, while the pseudo-second order adsorption mechanism is by chemisorption [20][21][22]. The first pseudo-first kinetic equation is represented by equation (2) where q t is the amounts of ammoniacal nitrogen adsorbed at time t and q e is the uptake of ammonia per unit weight of adsorbent at equilibrium (mg/g).…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Ammoniacal Nitrogen Removal Using flamboyant pods (Delonix Regia) Adsorbent for Natural Rubber Wastewater Treatment

Daud¹,

Ahmad²,

Awang³

et al. 2018

IJIE

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Plant waste such as Delonix Regia Pods (DRP) have the potential to be used as adsorbents. A study of lignocellulose delonix regia pods was carried to assess ammoniacal nitrogen removal from natural rubber wastewater. Sample wastewater was taken from the rubber processing industry and characterization was carried out. Outcomes from the analysis shows that the ammoniacal nitrogen concentration was 66 mg/L and higher than the recommended wastewater discharge standards. Batch experiments were conducted on the effect of dose, pH, shaking speed and contact time parameters for optimum condition. The results revealed that the optimal dosage, pH, shaking speed and contact time is 4.5 g, pH 8, 150 rpm and 120 minutes with ammoniacal nitrogen removal efficiency of 74.3 % and the adsorption capacity of 1.22 mg/g. Pseudo second order kinetic model was found to fit the data better and the R 2 obtained was 0.9992. From the study, it can be concluded that the media can be used for the removal of ammoniacal nitrogen in natural rubber wastewater and subsequently reduce environmental pollution. Hence, it can be sustainable and environmentally friendly.

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“…The ANOVA evaluation emphasizes the models significance for the removal (%) of COD and ammonia nitrogen with Prob > F values of < 0.0001 Table 4 and 5. Furthermore, the Prob > F of greater than 0.10 signifies the statistical inadequacy of the correlation among the process responses and variables [28][29][30][31][32][33][34][35][36][37][38]. Notwithstanding, some of the models' terms are have limited influence on the removal of COD and ammonia based on the F values.…”

Section: Optimizationmentioning

confidence: 99%

Optimization of Batch Conditions for COD and Ammonia Nitrogen Removal Using cockle shells Through Response Surface Methodology

Daud

Abubakar²,

Awang³

et al. 2018

IJIE

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Certain Building Materials with Respect to Their Thermal Properties as Well as to Their Impact to Environment

Cited by 8 publications

References 8 publications

Adsorption Efficiency and Isotherms of COD and Color Using Limestone and Zeolite Adsorbents

Adsorption Efficiency and Isotherms of COD and Color Using Limestone and Zeolite Adsorbents

Ammoniacal Nitrogen Removal Using flamboyant pods (Delonix Regia) Adsorbent for Natural Rubber Wastewater Treatment

Optimization of Batch Conditions for COD and Ammonia Nitrogen Removal Using cockle shells Through Response Surface Methodology

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