Treatment of acid rock drainage by clinoptilolite — Adsorptivity and structural stability for different pH environments
Source abstract
Abstract
Abstract The adsorptive capacity for aluminum, copper, iron and zinc ions of clinoptilolite was studied based on batch equilibrium tests using synthetic and natural acid rock drainage (ARD). Clinoptilolite efficiently adsorbed Cu2+, Fe2+, Al3+, and Zn2+ within 20–30 min. Stability tests were carried out for pH from 1 to 5 to determine the leaching of ions from clinoptilolite. After acid treatment at pH 3 were similar to that of untreated clinoptilolite. TEM showed that clinoptilolite had more rounded corners after treatment at pH 1, whereas at higher pH the morphology was similar to that of the untreated clinoptilolite. At low pH clinoptilolite might dissolve only at the surface. Clinoptilolite appears to be a good candidate for ARD treatment.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mine drainage and remediation techniques · Clay minerals and soil interactions · Arsenic contamination and mitigation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
Show source-provided references
1. Environmental Mining Council · 1997
2. Phosphorous adsorption and precipitation in a permeable reactive wall: applications for wastewater disposal systems
3. Barrer · 1978 · 385
4. Acid rock drainage and zeolite potential
5. A full-scale porous reactive wall for prevention of acid mine drainage10.1111/j.1745-6592.1997.tb01269.x ↗
6. Blowes · 1992
7. Boles · 1977
8. Breck · 1974
9. Activated sludge for the treatment of sulphur-rich wastewaters10.1016/S0892-6875(02)00049-3 ↗
10. Exploration of remediation of acid rock drainage with clinoptilolite as sorbent and a slurry bubble column for both heavy metal capture and regeneration10.1016/j.watres.2006.07.028 ↗
11. Dixon · 1989
12. Dyer · 1988
13. Adsorption capabilities of selected clinoptilolite-rich rocks as it relates to mine drainage remediation
14. Gottardi · 1985
15. Concept of subaqueous capping of contaminated sediments with active barrier systems (ABS) using nautral and modified zeolites10.1016/S0043-1354(98)00432-1 ↗
16. Jorgenson · 2000
17. A study of retention kinetics of heavy metals on clinoptilolite in reactive wall systems
18. Lai, W.R. (2005) The use of clinoptilolite as permeable reactive barrier substrate for acid rock drainage. Ph.D. thesis, Department of Civil Engineering, The University of British Columbia.
19. Geoenvironmental study — treatment of acid mine drainage using zeolite clinoptilolite
20. Multi-component heavy metal contaminants adsorptivity and compatibility onto variable charge clay minerals
21. Sustainable remediation of acid rock drainage along highways
22. Remediation of acid rock drainage by regenerable natural clinoptilolite10.1007/s11270-006-9246-3 ↗
23. Meier · 1978
24. Ming · 1989 · 873
25. In situ denitrification of septic system nitrate using reactive porous medium barriers: field trials10.1111/j.1745-6584.1995.tb00266.x ↗
26. The selectivity of clinoptilolite for certain heavy metals
27. Cation exchange on zeolites
28. Cation exchange properties of hydrothermally treated coal fly ash10.1021/es00007a009 ↗
29. Batch-type procedures for estimating soil adsorption of chemicals
30. Heavy metal removal with Mexican clinoptilolite: multi-component ionic exchange10.1016/S0043-1354(00)00270-0 ↗
31. Use of zeolite to treat acid rock drainage from Britannia mine
32. Waybrant · 1995 · vol. 3 · 945
33. Adsorption of some heavy metals by natural zeolites: XPS and batch studies10.1080/10934529909376856 ↗
34. Removal of metal cations from water using zeolites10.1080/01496399208019459 ↗