Adsorption of heavy metals by exhausted coffee grounds as a potential treatment method for waste waters

Utomo, Handojo Djati; Hunter, Keith A.

doi:10.1380/ejssnt.2006.504

Cited by 35 publications

(26 citation statements)

References 5 publications

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“…et al [35] and similar to the value reported by Utomo, H.D. et al [18]. The theoretical values of adsorption reported in the literature for alginate beads vary.…”

Section: Analysis Of Adsorption Isothermssupporting

confidence: 83%

“…After drying, SCGs were sieved through a #35 ASTM sieve (500 µm). Previous experiments in metal removal, where the employed coffee was only washed with deionized water, showed that this adsorbent continued to release soluble coffee material on subsequent exposure to aqueous solution [18]. Therefore, the SCGs were pretreated with 0.1 M NaOH (Fisher Chemical, Fair Lawn, NJ, USA) to remove the soluble materials as described in Dávila-Guzmán, N.E.…”

Section: Spent Coffee Grounds (Scgs)mentioning

confidence: 99%

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Adsorption of Ni2+ and Cd2+ from Water by Calcium Alginate/Spent Coffee Grounds Composite Beads

2019

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The use of heavy metals in technological applications has led to detrimental effects on human health and the environment. Activated carbon and ion-exchange resins are commonly used to remove pollutants but they are expensive. Therefore, the research of low-cost alternatives derived from natural resources and organic wastes is being considered. The aim of this study considers the use of Calcium Alginate/Spent Coffee Grounds (CA-SCGs) composite beads to adsorb heavy metals from aqueous solutions, particularly, the removal of Ni 2+ or Cd 2+ at concentrations from 10 ppm to 100 ppm. CA-SCGs beads were made of equal proportions of alginate and spent coffee grounds and compared with calcium alginate beads (CA beads) and spent coffee grounds (SCGs) in terms of capacity and rate of adsorption. Three cycles of adsorption/desorption were done. The beads were characterized by Scanning Electron Microscopy coupled with an energy-dispersive X-ray spectroscopy (SEM-EDX), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, and point of zero charge. Langmuir, Freundlich, and Sips models, and a pseudo-second-order kinetic equation were used. Sips model showed the best correlation with the adsorption of CA-SCGs beads with capacities of adsorption of 91.18 mg/g for cadmium and 20.96 mg/g for nickel. CA-SCGs beads had a greater adsorption than the CA beads, achieving adsorption percentages close to 100% than alginate alone, showing their effectiveness in heavy metal removal.

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“…et al [35] and similar to the value reported by Utomo, H.D. et al [18]. The theoretical values of adsorption reported in the literature for alginate beads vary.…”

Section: Analysis Of Adsorption Isothermssupporting

confidence: 83%

Section: Spent Coffee Grounds (Scgs)mentioning

confidence: 99%

Adsorption of Ni2+ and Cd2+ from Water by Calcium Alginate/Spent Coffee Grounds Composite Beads

2019

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“…Using potentiometric titration the acid base chemistry and stoichiometry of H + ion were studied for tea leaves and coffee grounds. Hence the study concluded that tea and coffee residues can be used to remove trace metal ions from water [105]. Table 1 shows the specific metal adsorption capacity of various agricultural wastes where several authors evaluated the adsorption efficiency for various heavy metals by using different isotherm models which shows the interaction pattern between the adsorbate and adsorbent.…”

Section: The Green Technology: Usage Of Effective Bioadsorbentsmentioning

confidence: 99%

Role of Bioadsorbents in Reducing Toxic Metals

Mathew¹,

Jaishankar²,

Biju

et al. 2016

Journal of Toxicology

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Industrialization and urbanization have led to the release of increasing amounts of heavy metals into the environment. Metal ion contamination of drinking water and waste water is a serious ongoing problem especially with high toxic metals such as lead and cadmium and less toxic metals such as copper and zinc. Several biological materials have attracted many researchers and scientists as they offer both cheap and effective removal of heavy metals from waste water. Therefore it is urgent to study and explore all possible sources of agrobased inexpensive adsorbents for their feasibility in the removal of heavy metals. The objective was to study inexpensive adsorbents like various agricultural wastes such as sugarcane bagasse, rice husk, oil palm shell, coconut shell, and coconut husk in eliminating heavy metals from waste water and their utilization possibilities based on our research and literature survey. It also shows the significance of developing and evaluating new potential biosorbents in the near future with higher adsorption capacity and greater reusable options.

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“…Hal ini disebabkan karena pada pH netral ion-ion logam dapat mengalami reaksi hidrolisis dalam larutan sehingga ia tidak stabil dalam bentuk ion logam semula dan menyebabkan kemampuan sekam padi untuk menyerapnya menurun. Sedangkan pada pH basa, ion-ion logam dapat membentuk endapan hidroksida sehingga efisiensi penyerapannya sukar untuk ditentukan (Refilda et al, 2001;Utomo et al, 2006).…”

Section: Hasil Dan Pembahasanunclassified

Sekam Padi untuk Menyerap Ion Logam Tembaga dan Timbal dalam Air Limbah

Nurhasni

Hendrawati

Saniyyah

2014

JKV

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AbstrakPenelitian ini bertujuan untuk memanfaatkan sekam padi sebagai penyerap ion logam tembaga dan timbal dalam air limbah telah dilakukan. Metode yang digunakan adalah metode statis (batch). Penentuan kondisi optimum meliputi massa adsorben, pH, konsentrasi adsorbat dan lama pemanasan. Hasil analisis menggunakan Spektrofotometer Serapan Atom (AAS) menunjukkan efisiensi penyerapan tertinggi pada air limbah multikomponen mencapai 99.38% untuk ion logam Pb. Analisis air limbah laboratorium kimia UIN Syarif Hidayatullah Jakarta, menunjukkan penyerapan tertinggi mencapai 78.57% untuk ion logam Cu. Kata kunci : sekam padi, adsorben ion logaam timbal, adsorben ion logam tembaga, air limbah AbstractThis research aims to rice huskas absorbent of copper and lead metalions in the waste water. The method used is a static method (batch). Determination of optimum conditions includes adsorbent mass, pH, absorbate concentration and duration of heating. The analysis using Atomic Absorption Spectrophotometer (AAS) showed the highest absorption efficiency of Pb metal ion in multicomponent wastewater reached 99,38%. The analysis of wastewater from chemistry laboratorium UIN Syarif Hidayatullah Jakarta showed, the highest absorption of Cu metal ion was 78,57%.

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Adsorption of heavy metals by exhausted coffee grounds as a potential treatment method for waste waters

Cited by 35 publications

References 5 publications

Adsorption of Ni2+ and Cd2+ from Water by Calcium Alginate/Spent Coffee Grounds Composite Beads

Adsorption of Ni2+ and Cd2+ from Water by Calcium Alginate/Spent Coffee Grounds Composite Beads

Role of Bioadsorbents in Reducing Toxic Metals

Sekam Padi untuk Menyerap Ion Logam Tembaga dan Timbal dalam Air Limbah

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