Total recovery of gold, palladium, and platinum using lignophenol derivative

Parajuli, Durga; Khunathai, Kanjana; Adhikari, Chaitanya Raj; Inoue, Katsutoshi; Ohto, Keisuke; Kawakita, Hidetaka; Funaoka, Masamitsu; Hirota, Kouichi

doi:10.1016/j.mineng.2009.06.003

Cited by 54 publications

(19 citation statements)

References 10 publications

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“…In recent years, biosorption has attracted many people's interest in water treatment (Ali and Gupta 2006;Ali 2010Ali , 2012Dhakal et al 2005;Ghimire et al 2008a, b;Inoue et al 2010;Parajuli et al 2009;Volesky 2007); biosorbents are the key material determining the purification efficiency, operation cost and practical feasibility. In the early periods, fungi and algae were the most common raw materials considered for biosorption, and adsorption mechanisms of various elements were demonstrated in these early studies (Pavasant et al 2006;Volesky 2007).…”

Section: Introductionmentioning

confidence: 99%

Removal of hexavalent chromium from aqueous solution by crosslinked mangosteen peel biosorbent

Huang

Xiu

Zhu

2014

Int. J. Environ. Sci. Technol.

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In present study the potential of a new biosorbent obtained from mangosteen peel was investigated for the removal of hexavalent chromium and trivalent chromium from the aqueous solutions. The biosorbent was modified by using concentrated sulphuric acid as the crosslinking reagent. Various batch experiments were carried out testing different values of several parameters such as pH, contact time, adsorbent dosages, and metal ion concentration to identify the optimum conditions. The effect of these parameters on the adsorption capacity and selectivity was studied. Results showed that optimum pH for hexavalent chromium adsorption was 3.0 and adsorption equilibrium was attained in 120 min. The adsorption data were found to fit Langmuir model and pseudo-secondorder equation. The adsorption mechanism for hexavalent chromium was found to be a complex process involving esterification, reduction and ion exchange, while cation exchange is the main route for trivalent chromium adsorption. From the above results, the crosslinked mangosteen peel gel appears to be a potential low-cost and effective adsorbent for hexavalent chromium and trivalent chromium removal from the waste water.

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Section: Introductionmentioning

confidence: 99%

Removal of hexavalent chromium from aqueous solution by crosslinked mangosteen peel biosorbent

Huang

Xiu

Zhu

2014

Int. J. Environ. Sci. Technol.

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“…Through increasing solution initial pH properly, the activity of PtCl 6 -can be enhanced and more Pt(IV) will be bound on the adsorbents, thus leading to the increase in the adsorption efficiency. Further increasing of pH may lead to hydrolysis of PtCl 6 -to form Pt (OH) 2 , and Pt(OH) 4 (Byrne and Yao 2000;Parajuli et al 2009). …”

Section: Effect Of Initial Solution Ph On Pt(iv) Adsorptionmentioning

confidence: 99%

“…Recently, biosorption technology has been found to be a simple and clean method to recover platinum from aqueous solution. Some of the adsorbents such as orange peel, grape wastes and rice husk (Parajuli et al 2006;Ramesh et al 2008;Parajuli et al 2009) were used for removing toxic elements and recovering precious metals from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Study on the adsorption behavior of modified persimmon powder biosorbent on Pt(IV)

Gong

Guo

Liang

et al. 2015

Int. J. Environ. Sci. Technol.

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A glycine-modified persimmon powder was used as biosorbent for platinum adsorption in aqueous solution. The combined effects of modifying agent amount, modifying time and temperature on Pt(IV) adsorption by persimmon biosorbent were investigated, from which the optimum modification conditions with modifying agent amount of 50 %, temperature of 333 K and contact time of 4.0 h were determined. The influences of solution initial pH, solid-to-liquid ratio, contact time, temperature and initial concentration on the Pt(IV) adsorption were studied systematically by batch experiments. The optimum modification conditions were determined as follows: chemical reagent amount of 50 %, temperature of 333 K and contact time of 4.0 h. From the adsorption kinetic analysis, it was found that the adsorption kinetics of glycine-modified persimmon powder followed a pseudo-second-order kinetic model. The adsorption isotherms of the crude persimmon powder and glycine-modified persimmon powder were analyzed with the BET-type adsorption isotherm. The adsorption mechanism of Pt(IV) on the glycine-modified persimmon was considered to be adsorption-reduction mechanism. The results achieved from this study indicated that the novel persimmon adsorbent could be applied to recover trace Pt(IV) ions from a concentrated chloride solution.

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“…Literatürde paladyumun BDK'lardan geri kazanılması için pirometalurjik [5], hidrometalurjik [3,[6][7][8][9] ve biyometalurjik yöntemlerin kullanıldığı çalışmalar mevcuttur [10][11][12]. Literatürde yer alan, atık kağıdın, üzüm atıklarının ve fenol ile odun lignininin çapraz bağlanmasıyla elde edilen lignofenolün adsorban olarak kullanıldığı biyometalurjik yöntemlerden farklı olarak bu çalışmada, biyosorbent olarak atık portakal kabukları kullanılmıştır.…”

Section: Introductionunclassified

Atık Portakal Kabuklarıyla Baskılı Devre Kartlarından Paladyum Adsorpsiyonu

Özkan¹,

Yapıcı²,

Günkaya³

et al. 2017

SDÜ Fen Bil Enst Der

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Özet: Türkiye'de bir yılda ortaya çıkan 539.000 ton elektronik atığın %3,1'ini Baskılı Devre Kartları (BDK) oluşturmaktadır. BDK yapımında, rezervleri sınırlı olan ve elde edilmeleri için büyük yatırımlar gerektiren değerli metaller kullanılmaktadır. Bu çalışmada, BDK'ların içinde yaklaşık %0,01 oranında bulunan paladyumun (Pd) biyosorbentle adsorpsiyonu hedeflenmiştir. Biyosorbent olarak, ülkemizde büyük miktarda açığa çıkan ve sadece hayvan yemi olarak kullanılan bir organik atık türü olan portakal kabukları kullanılmıştır. Çalışmada; öncelikle model çözeltilerde, farklı yöntemlerle modifiye edilmiş/edilmemiş portakal kabuklarıyla farklı koşullarda (pH, biyosorbent miktarı, sıcaklık,) adsorpsiyon çalışmaları gerçekleştirilmiş ve en uygun adsorpsiyon koşulları belirlenmiştir. Paladyum adsorpsiyonunun, izoterm çalışmalarında BET izotermine (R 2 =0,9798), kinetik çalışmalarda ise, yalancı ikinci derece modele uygun olduğu belirlenmiştir (R 2 : 0,9995). Diğer yandan, atık BDK'lar piroliz edilmiş ve katı ürün elde edilmiştir. Son aşamada ise, katı ürün liç edilmiş ve bu liç çözeltisinde en uygun koşullarda adsorpsiyon gerçekleştirilmiştir. Çalışma sonucunda %75 oranında Pd tutulmuştur. Palladium Adsorption from Printed Circuit Boards with Waste Orange PeelsKeywords Biosorption, Orange peel, Palladium, Printed circuit board, Waste electronic equipment Abstract: In Turkey, 539,000 tonnes of waste electronics are generated each year and 3.1% of them are printed circuit boards (PCBs). PCB production needs to use of some precious metals which have limited reserves and requires sizeable investment to obtain. In this study, it was aimed to adsorption of palladium which is 0.01% in PCBs. Orange peels, which is an organic waste that occurs in high quantity and can only be used animal feed, were used as the biosorbent. In the study, adsorption tests on the model solutions at different conditions (pH, amount of biosorbent, temperature) were carried out by modified with different methods/unmodified orange peels and best adsorption conditions were determined. Palladium adsorption were found appropriate to BET isotherm (R 2 =0.9798) and pseudo second order model (R 2 : 0.9995) for isotherm and kinetic studies, respectively. Simultaneously, waste PCB was pyrolyzed and a solid product was obtained. At the last stage, biosorption studies on leach solution of solid product obtained from PCB pyrolysis were carried out by using the best biosorbent which were defined by the adsorption results of the model solutions. In a result, palladium from PCB was adsorbed with 75% efficiency.

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Total recovery of gold, palladium, and platinum using lignophenol derivative

Cited by 54 publications

References 10 publications

Removal of hexavalent chromium from aqueous solution by crosslinked mangosteen peel biosorbent

Removal of hexavalent chromium from aqueous solution by crosslinked mangosteen peel biosorbent

Study on the adsorption behavior of modified persimmon powder biosorbent on Pt(IV)

Atık Portakal Kabuklarıyla Baskılı Devre Kartlarından Paladyum Adsorpsiyonu

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