Selective Recovery of Precious Metals by Selective Adsorption on Garlic Peel Gel

Huang, Kai; Jiao, Shuqiang; Zhu, Hongmin

doi:10.1002/9781118359341.ch33

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…11,12 In the past several years, our research group has conducted extensive studies on this abundant biowaste and successfully developed a series of interesting biosorbents used for the removal of heavy metal ion and dye contaminants, [13][14][15][16] deuoridation of drinking water, 17 and selective enrichment of gold ion from the leach liquor of e-wastes. 18,19 These studies open a wide route for the recycling and reuse of common garlic waste in a high value way, bringing a new eyesight and prot-making method for the traditional garlic farmers as well as garlic industry. Based on our preceding research work, we tried to utilize this special agro-waste in the recovery of phosphorous from the iron ore.…”

Section: Introductionmentioning

confidence: 99%

Selective recovery of phosphorus from acid leach liquor of iron ore by garlic peel adsorbent

et al. 2018

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Dephosphorisation of iron ore is an important challenge to the sustainable development of iron-making industry. Hydrometallurgical processing is quite effective in the reduction of phosphorus level from iron ores, where dilute sulfuric acid is commonly chosen as the lixiviant due to its prominent costeffectiveness. A cheap and effective biosorbent synthesized from garlic peel was proposed in present study to recover phosphorus selectively from acid leach liquor directly under acidic conditions near pH 1-2, allowing high purity phosphorus to be recovered and the residual acid to be recycled for the next round of leaching. This proposal would sharply reduce the dephosphorisation costs of iron ore. Various batch experiments were carried out under different conditions including varying pH, contact time, adsorbent dosages, and metal ion concentration to identify the optimal adsorption parameters for the model solutions. Results showed that the optimal pH for phosphate adsorption was around 1.5 and adsorption equilibrium was attained in 240 min, and the maximum adsorption capacity for phosphate was 1.40 mmol g À1 and 0.81 mmol g À1 at equilibrium pH of 1.5 and 6.5, respectively. A NaOH solution was effective to elute the adsorbed phosphate, and the eluted solution contained mainly Na 3 PO 4 and NaOH. Recovery of phosphorus from the iron ore leach liquor by the garlic peel adsorbent was quite effective, and the adsorption efficiency could retain 85% of the original adsorption capability even after five cycles of adsorption and desorption. In summary, the Zr-loaded garlic peel appears a potential lowcost and effective adsorbent for phosphate recovery from the acid leach liquor of high phosphorus iron ore.

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Section: Introductionmentioning

confidence: 99%

Selective recovery of phosphorus from acid leach liquor of iron ore by garlic peel adsorbent

et al. 2018

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Efficient removal of cadmium from soil-washing effluents by garlic peel biosorbent

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et al. 2018

Environ Sci Pollut Res

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Paddy field soil contaminated by cadmium may produce cadmium-contained corns causing Itai-itai disease, and in situ washing of soil with the organic acid is a good technical choice due to its convenience and cost-effectiveness. While the bottleneck of this technique is how to recycle the huge volume of washing effluent in an efficient and economical way. Biosorption of cadmium on the garlic peel was attempted in present study and it was found quite satisfactorily effective to remove all cadmium from the real soil leaching effluent after three-time sequential adsorption. The systematical investigation on the effect of various parameters on the adsorption of cadmium on garlic peel in the existence of tartaric ligand was performed and it was found that tartrate could change Cd into Cd(tar) species whose electrical charge state would restrain its approach to the adsorbent particles. The porous microstructure in the transversal surface of garlic peel and the abundant groups of -COOH are the main factors affecting the adsorption capability. A demonstrative flowsheet of soil remediation by chemical washing coupled with biosorption was proposed correspondingly, in which the cadmium could be recovered from the soil washing effluent, and the recovered effluent was reused for next soil washing, and recovered garlic peel was reused for cadmium adsorption from the effluents again, showing a great prospect in the remediation of paddy field soil contaminated by cadmium. Garlic peel was used to remove the cadmium from the soil washing effluent.

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Selective Recovery of Precious Metals by Selective Adsorption on Garlic Peel Gel

Cited by 2 publications

References 9 publications

Selective recovery of phosphorus from acid leach liquor of iron ore by garlic peel adsorbent

Selective recovery of phosphorus from acid leach liquor of iron ore by garlic peel adsorbent

Efficient removal of cadmium from soil-washing effluents by garlic peel biosorbent

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