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Ammonia Removal Using Coconut Shell Based Adsorbent: Effect of Carbonization Duration and Contact Time Oktavitri, Nur Indradewi; Purnobasuki, Hery; Kuncoro, Eko Prasetyo; Purnamasari, Indah
IPTEK Journal of Proceedings Series No 4 (2017): 2nd International Seminar on Chemistry 2016
Publisher : Institut Teknologi Sepuluh Nopember

The preparation of adsorbent using activated coconut shell was investigated at carbonization duration and adsorption contact time.Â The coconut shell was activated using physical and chemical activation.Â This research focused on variation of physical activation such as carbonization. The carbonization had two steps, there are high temperature and medium temperature. This research used 500oC at high temperature and 220oC at medium temperature. The duration of medium temperature was varied in 1, 2, and 4 hours. The chemical activation used H3PO4. The ammonia concentration of simulated wastewater around 6000 mg/l. The acclimatization period was 8 d. The coconut shell ability for ammonia removal was observed after acclimatization period in 0, 2, 4, 6, and 8d.Â The effect of carbonization period and contact time on ammonia adsorption of dairy simulated wastewater was discussed in this research. This research used anaerobic digestion with 10 liter of volume. The concentration of ammonia was measured with nessler methods. Carbonization duration and contact time increased the adsorption capacity. From the obtained result of adsorption isotherm, the Langmuir equation was the best fit for all carbonization period, especially 4-hour carbonization period.

Kinetics of Hg and Pb Removal in Aqueous Solution Using Coal Fly Ash Adsorbent Eko Prasetyo Kuncoro; Mochammad Zakki Fahmi
IPTEK Journal of Proceedings Series Vol 1, No 1 (2014): International Seminar on Applied Technology, Science, and Arts (APTECS) 2013
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2014i1.448

The objective of this research was to investigate the kinetics aspect of Hg and Pb adsorption using coal fly ash. A series of a Hg and Pb adsorption experiment using coal fly ash with contact time variation was carried out. The results were plotted to pseudo first order kinetic, pseudo second order kinetic and intra-particle diffusion model. High values of R2 were obtained from the plots of kinetics model for both heavy metals investigated, these values exceeded 0,8. The conclusion obtained was that Hg adsorption kinetics followed pseudo second order kinetic model while Pb adsorption kinetics followed intra-particle diffusion.

Kinetics of Hg and Pb Removal in Aqueous Solution Using Coal Fly Ash Adsorbent Eko Prasetyo Kuncoro; Mochammad Zakki Fahmi
IPTEK The Journal for Technology and Science Vol 25, No 3 (2014)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v25i3.480

Water pollution caused by heavy metals is a serious problem to environment. Hg and Pb are heavy metals having high toxicity level. Heavy metals treatment is necessary before releasing them to environment. The use of adsorption method is interesting because of its relatively simple operation. The development of adsorption is oriented to the use of industrial waste such as coal fly ash. The objective of this research is to investigate the kinetics aspect of Hg and Pb adsorption using coal fly ash. A series of a Hg and Pb adsorption experiment using coal fly ash with time variation was carried out. The results were plotted to pseudo first order kinetic and pseudo second order kinetic model. The conclusion obtained was that Hg and Pb adsorption kinetics followed pseudo second order kinetic model

Removal of Pb (II) Ions from Aqueous Solution using Mahogany (Swietenia macrophylla King) Sawdust as Lowcost Adsorbent Eko Prasetyo Kuncoro; Isni Arliyani; Handoko Darmoekoesoemo
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 1 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i1.59757

This research aimed to investigate the removal efficiency of Pb (II) ions using mahogany sawdust as an adsorbent. Several experiments were carried out to get the results. The batch adsorption method was used. The parameters studied were pH and contact time. The pH variation used was 2, 3, 4, 5, and 6. Contact time variation used was 5, 10, 15, 30, 60, 90, 120 and 150 minutes. To evaluate the isotherm model of the adsorption, the metal concentration variation used was 10, 25, 50, 100, 150, and 200 mg/L. To evaluate kinetics adsorption, pseudo-first-order and pseudo-second-order models were used. The characterization of the adsorbent was carried out by determining pHPZC, FTIR analysis, and SEM analysis. The adsorbent had a pHPZC of 5.63. FTIR spectra showed that the adsorbent had -OH functional group that could bind to Pb (II) ions. SEM analysis showed that the surface morphology of the adsorbent supported the removal of Pb (II) ions. In this work, pH 6 provided the highest removal of Pb (II) ions, while the contact time which provided the highest removal of Pb (II) ions was 30 minutes. The removal of Pb (II) ions followed the Freundlich adsorption isotherm, while the adsorption kinetics followed pseudo-second-order model.

Use of Placuna placenta Shells as Green Adsorbent for Pb(II) Ions Sequestration from Aqueous Solution Kuncoro, Eko Prasetyo; Matondang, Claudia Deborah Pretty; Hidayat, Muchlis Fajar; Darmokoesoemo, Handoko
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 8, No 3 (2023): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v8i3.77618

Heavy metal treatment is crucial to mitigate these elements' adverse environmental impacts. Among various remediation methods, adsorption stands out due to its simplicity and high efficiency. In this context, Placuna placenta shell, a biowaste, has been explored for its potential in treating wastewater contaminated with Pb(II) ions. This research was designed to assess the Placuna placenta shell's proficiency in removing Pb(II) ions from aqueous solutions. The study involved two main components: an adsorption test to evaluate the heavy metal removal capability of the Placuna placenta shel and a comprehensive characterization of the shell-based adsorbent. The adsorption experiments were conducted using a batch system, where variables such as pH levels and contact time were meticulously altered to determine their effect on the adsorption efficiency. Concurrently, the adsorbent underwent thorough characterization through Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD) analysis. The experimental findings indicated that the optimal conditions for maximum Pb(II) ion removal were achieved at a pH of 7 and a contact time of 120 minutes. The FTIR analysis of the adsorbent revealed the presence of calcium carbonate (CaCO3), a finding further substantiated by the XRD analysis results. Additionally, SEM imaging provided visual evidence of metal ion deposition on the aggregates of the adsorbent. The study demonstrated that the Placuna placenta shell exhibits promising qualities as an adsorbent for removing heavy metals from contaminated water sources. This finding highlights the potential of utilizing biowaste in environmental remediation and offers a sustainable approach to addressing heavy metal pollution.

Overseas Smart City Short Course of Airlangga and International Community Service: The Role of Science and Technology Towards Smart City Fitriani, Nurina; Fatmawati, Fatmawati; Samiaji, Tabina Arqika; Dianbudiyanto, Wahid; Hutama, Dio Alif; Kuncoro, Eko Prasetyo
Journal of Sustainability Perspectives Vol 4, No 2: December 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2024.21377

The smart city concept emerged as an alternative solution to overcome the negative impacts of urbanization in big cities, based on the concept of sustainable development. A smart city is a city that can utilize human resources, social capital, and modern telecommunications infrastructure to achieve sustainable economic growth and high quality of life through wise management of resources by the government based on community participation. Jombang has not been managed optimally due to a lack of digital exposure and promotion. Based on these problems, the Faculty of Science and Technology, Airlangga University will organize an international community service program in Jombang to introduce culture and tourism in Jombang to the world through international students and transfer knowledge regarding the application of smart tourism to increase tourism promotion in Jombang. This community service program was carried out together with international students who will first be given an introduction and knowledge of the smart city concept and its application at Universitas Airlangga and the City of Surabaya through a short course. Then the students will be invited to visit the tourist and cultural village in Jombang to transfer knowledge to the local community regarding the application of the smart tourism concept to promote tourism potential in Jombang.

Overseas Smart City Short Course of Airlangga and International Community Service: The Role of Science and Technology Towards Smart City Fitriani, Nurina; Fatmawati, Fatmawati; Samiaji, Tabina Arqika; Dianbudiyanto, Wahid; Hutama, Dio Alif; Kuncoro, Eko Prasetyo
Journal of Sustainability Perspectives Vol 4, No 2: December 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2024.21377

The smart city concept emerged as an alternative solution to overcome the negative impacts of urbanization in big cities, based on the concept of sustainable development. A smart city is a city that can utilize human resources, social capital, and modern telecommunications infrastructure to achieve sustainable economic growth and high quality of life through wise management of resources by the government based on community participation. Jombang has not been managed optimally due to a lack of digital exposure and promotion. Based on these problems, the Faculty of Science and Technology, Airlangga University will organize an international community service program in Jombang to introduce culture and tourism in Jombang to the world through international students and transfer knowledge regarding the application of smart tourism to increase tourism promotion in Jombang. This community service program was carried out together with international students who will first be given an introduction and knowledge of the smart city concept and its application at Universitas Airlangga and the City of Surabaya through a short course. Then the students will be invited to visit the tourist and cultural village in Jombang to transfer knowledge to the local community regarding the application of the smart tourism concept to promote tourism potential in Jombang.

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