Recovery of silver from nickel electrolyte using corn stalk-based sulfur-bearing adsorbent

Li, Xinyu; Wang, Yanyan; Cui, Xiaoxiao; Lou, Zhenning; Shan, Wei; Xiong, Ying; Fan, Yu

doi:10.1016/j.hydromet.2018.01.024

Cited by 22 publications

(17 citation statements)

References 32 publications

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“…The parameters of Dubinin-Radushkevich isotherm are given in Table 4. The maximum adsorption capacity of OCS-ET-TU adsorbent (corn stalk-based sulfur-bearing adsorbent) for AgCl4 3-was 107.9 mg/g in single system and 79.94 mg/g in simulate nickel electrolyte system (Li et al, 2018). The best fit was characterized by the Langmuir model for the adsorption of AgCl4 3-on the biomaterial.…”

Section: Sorption Isotherm Studiesmentioning

confidence: 99%

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Novel functional polymers for recovery of silver

Pilśniak-Rabiega¹,

Wolska²

2021

Physicochem. Probl. Miner. Process.

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In this study, the functional polymers containing heterocyclic ligands were synthesized by microwave modification of a crosslinked poly(vinylbenzyl chloride-divinylbenzene) matrix with 4-tertbutylpyridine, pyrrolidine, and 3-morpholinopropylamine. The sorbents were used to recover Ag(I) from the synthetic and real chloride solutions (4.00 mol/dm 3 of NaCl, 0.100 mol/dm 3 of HCl). The best Ag(I) sorption was achieved from synthetic and real chloride solutions in the case of pyrrolidine resin (16.2 and 16.7 mg/g, respectively). The sorption kinetic data were well fitted to the pseudo-first-order kinetic model. The degree of silver desorption was approximately 90% using a 1.0% potassium cyanide solution in a 0.50% hydrogen peroxide solution. All resins showed good selectivity for Ag(I) compared to Cu(II), Pb(II), Co(II), Ni(II), and Zn(II) in real chloride solution. On the basis of this study, it can be concluded that the obtained sorbents can be used to recover Ag from various sources such as ores, wastewater, and jewelry scraps.

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Section: Sorption Isotherm Studiesmentioning

confidence: 99%

“…The OCS-ET-TU adsorbent had strong adsorption capacity and selectivity to AgCl4 3− in industrial nickel electrolyte. The maximum adsorption capacity of Ag(I) was 3.06 mg/g, but the other competing metal ions (Ni(II), Cu(II)) could not be adsorbed onto the OCS-ET-TU (Li et al, 2018).…”

Section: Introductionmentioning

confidence: 96%

Novel functional polymers for recovery of silver

Pilśniak-Rabiega¹,

Wolska²

2021

Physicochem. Probl. Miner. Process.

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“…Several physico-chemical methods have been employed over the years for the removal of Ni from aqueous solutions [ 220 ]. Regardless of which of these methods have been used in the past, newer, cheaper, and more efficient methods of adsorption have been used for Ni removal, such as the use of biomass, where sugarcane, corn cobs, citrus peels, and bark have been used [ 221 ]. In a study, corn hydrochar was treated with KOH and altered by treating polyethyleneimine (PEI) to increase adsorption of Ni ions onto the surface [ 222 ].…”

Section: Bacillus Species and Heavy Metalsmentioning

confidence: 99%

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

2021

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The rise of anthropogenic activities has resulted in the increasing release of various contaminants into the environment, jeopardizing fragile ecosystems in the process. Heavy metals are one of the major pollutants that contribute to the escalating problem of environmental pollution, being primarily introduced in sensitive ecological habitats through industrial effluents, wastewater, as well as sewage of various industries. Where heavy metals like zinc, copper, manganese, and nickel serve key roles in regulating different biological processes in living systems, many heavy metals can be toxic even at low concentrations, such as mercury, arsenic, cadmium, chromium, and lead, and can accumulate in intricate food chains resulting in health concerns. Over the years, many physical and chemical methods of heavy metal removal have essentially been investigated, but their disadvantages like the generation of chemical waste, complex downstream processing, and the uneconomical cost of both methods, have rendered them inefficient,. Since then, microbial bioremediation, particularly the use of bacteria, has gained attention due to the feasibility and efficiency of using them in removing heavy metals from contaminated environments. Bacteria have several methods of processing heavy metals through general resistance mechanisms, biosorption, adsorption, and efflux mechanisms. Bacillus spp. are model Gram-positive bacteria that have been studied extensively for their biosorption abilities and molecular mechanisms that enable their survival as well as their ability to remove and detoxify heavy metals. This review aims to highlight the molecular methods of Bacillus spp. in removing various heavy metals ions from contaminated environments.

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“…Due to its limited availability and decreasing natural resources, the recovery of silver from industrial water is essential for environmental and economic profits (Ho et al, 2018). Chemical precipitation, adsorption, biosorption, and bioreduction are amongst the conventional methods that are currently used for Ag(I) removal from wastewater (Li, X. et al, 2018). In a cost-effective MFC, silver recovery efficiencies as high as 99.91-98.26% were obtained with initial concentrations ranging from 50 to 200 ppm, with a maximum power density of 4.25 W/m² after 8 h operation (Choi and Cui, 2012).…”

Section: Silvermentioning

confidence: 99%