Removal of heavy metals by adsorbent prepared from pyrolyzed coffee residues and clay

Boonamnuayvitaya, Virote; Chaiya, Chaiyan; Tanthapanichakoon, Wiwut; Jarudilokkul, Somnuk

doi:10.1016/s1383-5866(03)00110-2

Cited by 250 publications

(129 citation statements)

References 21 publications

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“…Figure 1a and 1b reveals that kapok carbon fiber shows cylindrical hollow lumen structure with a relatively smooth and clean surface containing only minor wrinkles, grooves and cracks. This is attributed to the decomposition of organic materials of kapok fiber during carbonization (Boonamnuayvitaya et al, 2004). The internal diameter and wall thickness of kapok carbon fiber were measured and lie in the range of 5.816-6.497 µm and 460.5-488.7 nm, respectively.…”

Section: The Physical Properties Of Wetted Materials and Sintered Promentioning

confidence: 98%

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Water Filter Fabrication from a Mixture of KMnO4 Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe3+Removal and Water Hardness Treatment

Thongdee¹,

Parun²,

Benjatitmongkhon³

et al. 2017

American Journal of Applied Sciences

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A water filter was fabricated from a mixture of KMnO 4 modified kapok carbon fiber, zeolite, bentonite and kaolinite clay for Fe 3+ removal and water hardness treatment. The effects of amount of KMnO 4 modified kapok carbon fiber (30-60 wt%), zeolite (20-40 wt%) and sintering temperature (500-700°C) on the properties of sintered products were evaluated. The best of sintered products were tested for treatment of solutions with 5 mg L −1 Fe 3+ and 40-200 mg L −1 total water hardness. The results show that the physical properties of the sintered products were affected by the contents of KMnO 4 modified kapok carbon fiber and sintering temperature. The linear drying shrinkages of the mixture of raw materials increase with increasing content of modified kapok carbon fiber amounts due to the effect of water amount used for mixing process. Furthermore, firing shrinkages of sintered products increased with increasing sintering temperature for the same ratio of raw materials. Finally, the firing shrinkages and density of sintered products decrease with increasing content of the modified kapok carbon fiber at constant sintering temperature. It was shown that the sintered product made with 40 wt% of KMnO 4 modified kapok carbon fiber and sintered at 600°C is suitable for filter fabrication. The KMnO 4 modified kapok carbon fiber filter could adsorb 5-6% more Fe 3+ at equilibrium than filter made with kapok carbon fiber. The Fe 3+ was removed by adsorption and precipitation processes. The Fe 3+ adsorption process of modified kapok carbon fiber filter was fitted to the Langmuir model with maximum adsorption capacity of 53.76 mg g −1 . For hardness removal, the Ca for Mg 2+ and 28.1-123.5 mg g −1 for HCO 3¯, respectively.

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Section: The Physical Properties Of Wetted Materials and Sintered Promentioning

confidence: 98%

“…Its structure is also a tetrahedral silica sheet alternating with an octahedral alumina sheet (Uddin, 2017). It was used as a binding agent since the clay itself has binding and adsorption capacity and can increase reinforcement of the adsorbent (Boonamnuayvitaya et al, 2004).…”

Section: +mentioning

confidence: 99%

Water Filter Fabrication from a Mixture of KMnO4 Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe3+Removal and Water Hardness Treatment

Thongdee¹,

Parun²,

Benjatitmongkhon³

et al. 2017

American Journal of Applied Sciences

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“…Šo trūkumu palīdz novērst apdedzinātas mālu keramikas izmantošana ūdens attīrīšanas tehnoloģijās. Literatūrā atrodams ļoti daudz materiālu par keramikas materiālu izmantošanu smago metālu jonu saistīšanai no ūdens šķīdumiem [5][6][7][8][9][10][11]. Klasiskajā keramikas tehnoloģijā ir labi zināms, ka, apdedzinot keramikas materiālus, to porainība un materiāla īpatnējā virsma samazinās.…”

Section: Ievadsunclassified

“…700 un 900°C temperatūrā apdedzinātas granulas adsorbē vēl mazāk amonjaka, tikai 0,5 -1,0 % no šķīdumā esošā amonjaka. 8.att. Amonija adsorbcija uz dažādās temperatūrās apdedzinātu Lažas mālu granulām no 0,03 n amonjaka šķīduma Apskatot amonija sorbciju Progresa mālu granulās (9.att.…”

Section: Att 1050˚c Temperatūrā Apdedzinātu Lažas Un Progresa Māluunclassified

Porainu kvartāra mālu keramikas granulu sorbcijas īpašības

Švinka

Dabare

2014

Material Science and Applied Chemistry

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Kopsavilkums. Analizētas iespējas izmantot apdedzinātu kvartāra mālu porainas granulas ūdens attīrīšanai. Izvēlēti Lažas un Progresa atradņu māli ar atšķirīgu ķīmisko un granulometrisko sastāvu un porainības palielināšanai izmantotas koksnes skaidas kā izdegošās piedevas. Sorbcijas aktivitāte noteikta attiecībā uz molekulāriem (jods) un jonogēniem (amonija jons) savienojumiem.Atslēgas vārdi: Latvijas kvartāra māli, porainas granulas, sorbcijas aktivitāte. I. IEVADSŅemot vērā arvien pieaugošo apkārtējās vides piesārņojumu ar dažādām vielām -smago metālu savienojumiem, šķīdinātājiem u.c., arvien pieaug pieprasījums pēc sorbentiem, filtriem, sorbējošām un filtrējošām membrānām u.tml. Ļoti piemērots materiāls vides attīrīšanas tehnoloģijām ir māls un keramikas materiāli uz māla bāzes. Dabīgiem māliem piemīt īpašība sorbēt dažādus savienojumus [1][2][3][4], bet šāda veida sorbējošiem materiāliem piemīt arī trūkums. Ņemot vērā mālu minerālu koloidālo raksturu, ūdens pēc attīrīšanas ar māliem iegūst cita veida piesārņojumu -tas satur koloidālās māla daļiņas, tādēļ nepieciešami papildus tehnoloģiskie procesi ūdens attīrīšanai. Šo trūkumu palīdz novērst apdedzinātas mālu keramikas izmantošana ūdens attīrīšanas tehnoloģijās. Literatūrā atrodams ļoti daudz materiālu par keramikas materiālu izmantošanu smago metālu jonu saistīšanai no ūdens šķīdumiem [5][6][7][8][9][10][11]. Klasiskajā keramikas tehnoloģijā ir labi zināms, ka, apdedzinot keramikas materiālus, to porainība un materiāla īpatnējā virsma samazinās. Tātad samazinās arī keramikas materiāla iespējamā sorbcijas spēja. Mūsdienās ir zināmi daudzi paņēmieni, kā palielināt apdedzināmā materiāla porainību. Visbiežāk tiek izmantoti dažādi vieglāk pieejami organiskas izcelsmes materiāli. Keramikas materiālu porainības palielināšanai izmantojamās vielas bieži ir dažādu ražošanas nozaru blakusprodukti vai atkritumi, piem., koksnes skaidas, kafijas biezumi, salmi, graudu sēnalas, papīrs, u.c. Ņemot vērā konkrēto izmantojamo mālu sastāvu un īpašības, iespējams izvēlēties konkrētu izejvielu maisījuma sastāvu, keramikas apdedzināšanas temperatūru, temperatūras celšanas ātrumu, lai iegūtu materiālu ar iespējami lielāko porainību un īpatnējo virsmu. II. MATERIĀLI UN METODESDarbā izmantoti divu dažādu Latvijas reģionu kvartāra māli -Lažas māli no Kurzemes Aizputes novada un Progresa māli no Zemgales Ozolnieku novada Lielupes labajā krastā. Progresa atradnes mālus izmanto AS "Lode" Ānes ražotnē siltumizolējošo "Keraterm" bloku ražošanai. No plastiskām abu pētīto mālu masām ar 3 masas % koksnes skaidu piedevu (skaidu diametrs ≤ 2 mm) ar ekstrūzijas paņēmienu veidotas mālu granulas ar diametru 4,5 mm. Granulas pēc izžāvēšanas apdedzinātas 700, 800, 900 un 1050˚C temperatūrās. Temperatūras celšanas ātrums krāsnī 300˚C/h, izturēšanas laiks apdedzināšanas temperatūrā 1 h. Apdedzināšanas temperatūras izvēlētas saskaņā ar izmantoto mālu diferenciālās termiskās analīzes rezultātiem [12].Granulu fāžu sastāva raksturošanai izmantota rentgena staru difrakcijas analīze (rentgendifraktometrs Ri...

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“…Therefore, the extraction of heavy metal elements from the wastewater has been important subject to many researchers and scientists until now. Various suggested methods to treat the heavy metal elements from the wastewater have been proposed-such as chemical precipitation, absorption, coagulation, ion exchange, and membrane filtration [13][14][15][16][17][18][19][20]-but no best method has not been proposed until now. Among those possible techniques, an adsorption method using the biomass such as coffee and algae has been considered as one of the promising methods for the removal of heavy metals from wastewater [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

An Environmentally Benign Approach for As (V) Absorption from Wastewater Using Untreated Coffee Grounds—Preliminary Results

Nam

Kim

Lee

et al. 2017

Water

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Arsenic contamination of water is a worldwide issue due to its severe effects on the human body. Coffee grounds are a porous material with network structures, making it absorb other substances such as some gases or elements. In this research, renewable coffee wastes were used as an adsorbent to extract arsenic (As) from wastewater. In order to evaluate the usefulness of untreated coffee grounds, a series of preliminary tests for attachment of arsenic to coffee grounds were provided. The Brunauer-Emmett-Teller (BET) surface area and adsorption-desorption isotherms of an untreated coffee ground obtained from N 2 gas adsorption were provided, and pore sizes was obtained using Barrett-Joyner-Halenda (BJH) method. The adsorption capacities of the coffee waste were verified through a series of experimental processes changing the conditions such as concentration of arsenic, initial amount of coffee grounds, and pH. The maximum absorption concentration of 6.44 mg/L on 1 g of coffee grounds at 1.00 mM of arsenic solution was observed. It was demonstrated that the modification by the cation species or pretreatment processes, such as calcination, will be necessary to enhance the absorption capacity for the extraction of arsenic.

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Removal of heavy metals by adsorbent prepared from pyrolyzed coffee residues and clay

Cited by 250 publications

References 21 publications

Water Filter Fabrication from a Mixture of KMnO<sub>4</sub> Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe<sup>3+</sup>Removal and Water Hardness Treatment

Water Filter Fabrication from a Mixture of KMnO<sub>4</sub> Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe<sup>3+</sup>Removal and Water Hardness Treatment

Porainu kvartāra mālu keramikas granulu sorbcijas īpašības

An Environmentally Benign Approach for As (V) Absorption from Wastewater Using Untreated Coffee Grounds—Preliminary Results

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