Removal of Cadmium (II) from Aqueous Solution by Rice Husk Waste

Saeed, Anwar Ameen Hezam; Harun, Noorfidza Yub; Sufian, Suriati; Ghaleb, Aiban Abdulhakim Saeed; Jagaba, Ahmad Hussaini; Mohammed, Haetham G.; Abdulrab, Hakim

doi:10.1109/icoten52080.2021.9493473

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…The biosorbent synthesized with rice husk from South America and with relatively low addition of NaOH reached an interesting q normalmax (11.06 mg/g) in relation to the other biosorbents. [39, 42] obtained higher values of q normalmax ; however, they used a higher concentration of NaOH during the treatment of their biosorbents, which could have increased the number of active sites on the biosorbent.…”

Section: Resultsmentioning

confidence: 99%

“…After an extensive bibliographic search, it has been observed that works using rice husk to remove cadmium from water had been predominantly carried out in Asia [37][38][39][40][41][42]. This is why it is relevant to study biosorbents made out of South American rice husk, since the composition of rice husk varies in different regions according to its geographical characteristics and type of rice, among other factors.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Cd (II) Using Chemically Modified Rice Husk: Characterization, Equilibrium, and Kinetic Studies

Andia

Reátegui-Romero

Peña-Contreras

et al. 2022

Adsorption Science & Technology

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Cadmium (Cd) is a highly toxic heavy metal considered carcinogenic to humans. The adsorption behavior of cadmium adsorption using untreated and chemically modified rice husk was investigated. Experimental tests were carried out to evaluate the influence of the variables pH, initial concentration of cadmium, and dosage of adsorbent in the adsorption process. In optimal experimental conditions, the maximum adsorption efficiency was 92.65%. Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) were used allowing the identification of the main functional groups and morphology of rice husk and treated rice husk, and the results showed an improvement of adsorption characteristics after rice husk treatment with NaOH. The optimum adsorption pH for both types of rice husk was 7. The maximum adsorption capacities of RH and treated RH fitted by the Langmuir model were 5.13 mg/g and 11.06 mg/g, respectively. The pseudosecond order kinetics has the best coefficients of determination for untreated ( R 2 = 0.992 ) and treated ( R 2 = 0.999 ) rice husk. The adsorption process was found to be endothermic in nature with enthalpy of 14.08 kJ/mol and entropy of 170.98 J/mol.K. The calculated activation energy was 24 kJ/mol. The results showed the potential of rice husk as a low-cost, easily managed, and efficient biosorbent for Cd removal from waters.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of Cd (II) Using Chemically Modified Rice Husk: Characterization, Equilibrium, and Kinetic Studies

Andia

Reátegui-Romero

Peña-Contreras

et al. 2022

Adsorption Science & Technology

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“…Consequently, the anaerobic decomposition of organics additionally leads to the production of foul-smelling gases [10,11]. Through this, emerging contaminants and heavy metals build in flora and fauna inside the water, eventually affecting the human food chain Moreover, apart from solid media to suspended growth to have biofilm attached to a surface, the growth process is such a successful process, hence improve and increase microbial concentration and rates of pollutant deterioration [12,13]. Biofilms benefit from an amount of removal of process mechanisms such as biodegradation [14].…”

Section: Introductionmentioning

confidence: 99%

Kinetics study of nutrients removal from synthetic wastewater using media as submerged in continuous activated sludge system

2023

Sustainable Processes and Clean Energy Transition

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Abstract. Domestic wastewater effluents are one of the main sources of environmental contaminants such as nutrients. Wastewater has been treated with biological processes for over a century to remove contaminants. Conventional wastewater treatment plants continue to struggle to meet Malaysian discharge limits. Stringent regulation enforced by governing authorities makes it obligatory to comply with discharge guidelines to fulfill ammonia and nitrate levels. To assist the system in meeting these limits, it is recommended that a submerged attached growth Palm Oil Clinker (POC) can be incorporated into the conventional treatment system. The study was conducted in a continuous submerged attach growth conventional activated sludge which was evaluated for the treatment of wastewater (CSAR). A basket was installed in the aeration tank of the reactor to submerge (POC). Two identical reactors were operated for each reactor of study which (A) was referred to as submerged media reactor while (B) was referred to as control. The studies were carried out at various influent flow rates between 5 and 30 L/d, and constant organic load rate OLR. Parameters such as NH4-N, and NO3-N, were monitored. Generally, Ammonia and Nitrate were highly removed. At all conditions of flow rate (5-30 L/d), the maximum and minimum NH4-N removal is 92% and 85%. The experimental data were validated through well-established mathematical bio-kinetic models such as the First order model, and Monod models. The kinetic coefficients R2 of the first-order model of the substrate removal rate were 0.97 for Ammonia. The steady-state data was fitted to both models obtained at various flowrate. Monod's kinetic model was appropriate for describing experimental results in terms of microbial growth parameters. The kinetic coefficients R2 (0.984) and Ks 303 for the removal of Ammonia, respectively. While µmax 10 g/L.d for Ammonia removal respectively.

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“…As a result, industrial effluent limits for industrial effluents are a top concern for water quality handling schemes aimed at environmental protection. Suitable effluent limitations are required for effective control [3,4]. The wastewater generated by the pulping process can be treated in a variety of ways [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydraulic Retention Time on the Treatment of Pulp and Paper Industry Wastewater by Extended Aeration Activated Sludge System

Jagaba

Kutty

Baloo

et al. 2021

2021 Third International Sustainability and Resilience Conference: Climate Change

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The pulp and paper industry produce darkcolored effluent with high levels of organic matter and nutrients. As a result, a biological treatment system consisting of an aeration tank containing 3.5-6 g/L starting biomass and a clarifier chamber was set up in this investigation. After acclimation, the reactor was driven at a flow rate of 5 L/day for a few weeks at 48h, 24h, and 12h HRT. All through the investigation, the concentrations of organic and nutrient parameters are measured in the influent and effluent samples and documented for data processing. The results reveal that ammonia has satisfactorily met the Standard "A" standard limits of 10 mg/L after 24 hours of HRT. As a result, reduction efficiencies for nitrate and COD were 80.5% and 95%, respectively. Surprisingly, the majority of the effluent COD readings met the acceptable standard, so no additional testing is required. The mean BOD concentration in effluent was found to be 4.54 mg/L.

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Removal of Cadmium (II) from Aqueous Solution by Rice Husk Waste

Cited by 8 publications

References 13 publications

Adsorption of Cd (II) Using Chemically Modified Rice Husk: Characterization, Equilibrium, and Kinetic Studies

Adsorption of Cd (II) Using Chemically Modified Rice Husk: Characterization, Equilibrium, and Kinetic Studies

Kinetics study of nutrients removal from synthetic wastewater using media as submerged in continuous activated sludge system

Effect of Hydraulic Retention Time on the Treatment of Pulp and Paper Industry Wastewater by Extended Aeration Activated Sludge System

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