Zeolite-Clinoptilolite conditioning for improved heavy metals ions removal: A preliminary assessment
Source abstract
Abstract
The emerging problem of nickel allergy is increasingly widespread due to the increase in nickel content in everyday foods. The physicochemical structure of the zeolites makes it possible to adsorb nickel ions in solution. The properties of molecular sieves, together with those of a size and a chemical composition compatible with the human gastrointestinal tract, are present in a particular zeolite called clinoptilolite. In this work, a type of natural clinoptilolite was characterized before and after being subjected to two different conditioning processes with NaCl to increase its adsorption efficiency and specificity against nickel. The three forms of clinoptilolite, natural, conditioned, and biconditioned, were compared based on analysis of absolute density, X-ray diffraction pattern, granulometry, porosity, chemical composition, and grain morphology. Finally, nickel ion removal tests were performed in an aqueous solution that simulates the conditions of the gastrointestinal tract. The Ni2+ removal efficiency of natural clinoptilolite is 73.2%, while after conditioning it reaches 96.6%. Double conditioning with Na does not generate a considerable increase in removal efficiency which remains at 96.8%.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Heavy metals in environment · Chemical Synthesis and Characterization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. A review on zeolites as cost-effective adsorbents for removal of heavy metals from aqueous environment10.1007/s13762-021-03560-3 ↗
2. Heavy metal removal from industrial wastewater by clinoptilolite
3. Application of natural and synthetic zeolites in the oenological field10.1016/j.foodres.2021.110737 ↗
4. Enhanced photocatalytic degradation of dye contaminants with TiO2 immobilized on ZSM-5 zeolite modified with nickel nanoparticles10.1016/j.jclepro.2020.124518 ↗
5. 2010
6. Natural zeolites in diet or litter of broilers10.1080/00071668.2016.1150962 ↗
7. Geopolymers vs. Cement matrix materials: how nanofiller can help a sustainability approach for smart construction applications—a review10.3390/nano11082007 ↗
8. NH4+, Cu2+, Zn2+, Cd2+ and Pb2+ exchange for Na + in a sedimentary clinoptilolite, North Sardinia, Italy10.1016/S1387-1811(99)00276-0 ↗
9. Experiments and data processing of ion exchange equilibria involving Italian natural zeolites: a review10.1016/j.micromeso.2007.04.024 ↗
10. Review of the natural, modified, and synthetic zeolites for heavy metals removal from wastewater10.1089/ees.2015.0166 ↗
11. Food as a source of exposure to nickel
12. Nickel10.1081/CLT-100102423 ↗
13. Metal allergy--a review on exposures, penetration, genetics, prevalence, and clinical implications10.1021/tx9002726 ↗
14. Systemic nickel allergy syndrome: epidemiological data from four Italian allergy units10.1177/039463201402700118 ↗
15. Irritable bowel syndrome‐like disorders in endometriosis: prevalence of nickel sensitivity and effects of a low‐nickel diet. an open‐label pilot study10.3390/nu12020341 ↗
16. Nickel, chromium and cobalt: the relevant allergens in allergic contact dermatitis. Comparative study between two periods: 1995-2002 and 2003-201510.1590/abd1806-4841.20186047 ↗
17. Systemic nickel allergy Syndrome: epidemiological data from four Italian allergy units10.1177/039463201402700118 ↗
18. Irritable bowel syndrome and nickel allergy: what is the role of the low nickel diet?10.5056/jnm16027 ↗
19. Low nickel diet in dermatology10.4103/0019-5154.110846 ↗
20. New insights in IBS-like disorders: pandora's box has been opened; a review
21. Nickel essentiality, toxicity, and carcinogenicity10.1016/S1040-8428(01)00214-1 ↗
22. Critical review on zeolite clinoptilolite safety and medical applications in vivo
23. Ni2+ removal from aqueous solutions using conditioned clinoptilolites: kinetic and isotherm studies10.1002/ep.10316 ↗
24. Shaped natural and synthetic zeolites for CO2capture in a wide temperature range10.1016/j.jcou.2022.102335 ↗
25. CO2 capture on natural zeolite clinoptilolite: effect of temperature and role of the adsorption sites10.1016/j.jenvman.2020.111229 ↗
26. Natural zeolite clinoptilolite application in wastewater treatment: methylene blue, zinc and cadmium abatement tests and kinetic studies10.3390/ma15228191 ↗
27. A novel solid-phase extraction method for preconcentration of silver and antimicrobial properties of the Na-clinoptilolite–Ag composite10.1016/j.matpr.2019.10.049 ↗
28. Antibacterial activity of Na-clinoptilolite against Helicobacter pylori: in-vitro tests, synergistic effect with amoxicillin and stability of the antibiotic formulated with the zeolite10.1016/j.micromeso.2019.109592 ↗
29. Intraluminal pH of the human gastrointestinal tract
30. Screening of metals such as copper (Cu), zinc (Zn), nickel (Ni) and lead (Pb) in the human
31. Analysis of grinding in a spiral jet mill. Part 1: batch grinding10.1016/j.ces.2020.116310 ↗
32. Use of clinoptilolite for the removal of nickel ions from water: kinetics and thermodynamics10.1016/j.jhazmat.2007.05.008 ↗
33. Heterogeneity and hierarchy of clinoptilolite porosity10.1016/j.jpcs.2010.05.006 ↗
34. Na+/Ca2+ aqueous ion exchange in natural clinoptilolite zeolite for polymer-zeolite composite membranes production and their CH4/CO2/N2 separation performance10.1016/j.jngse.2018.03.007 ↗
35. Thermal and structural stability of microporous natural clinoptilolite zeolite10.1016/j.micromeso.2022.112101 ↗
36. Heu - clinoptilolite