Sequential treatment of acid mine drainage using various treatment media in a permeable reactive barrier

Clicks: 6
ID: 284894
2023
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Steady

Ranked #96 of 3,757 articles by views in Malay Journal

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 3,757 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Passive treatment of acid mine drainage (AMD) uses limestone as its most common material due to its abundance and alkaline-generating capacity. However, its treatment capability is severely limited when metal hydroxides precipitate and minimize its dissolution, rendering limestone inert. In this study, laterite mine waste (LMW) and concrete waste were used in sequence with limestone to increase the efficiency and capacity of the treatment system. A full-factorial batch test was done to determine the optimal sequence of these materials based on the pH increase, and metals and sulfates removal of the AMD. A constant ratio of 0.75 mL AMD/ g media was maintained with a 15-minute retention time in each treatment material. The system with limestone, LMW, and concrete waste present in this sequence achieved the highest treatment efficiency. The sequence increased pH to 8.08 and removed 38.90% Fe, 94.30% Ni, 71.76% Al, and 51.69% sulfates. A semi-batch test followed to determine the treatment capacity of the optimal sequence. The results show an initial increase in pH from 2.4 to 10.80 which becomes constant around pH 7 starting from the 10th batch of AMD treatment. Calcium levels were well above the initial concentration and stabilized around 700 ppm. A 32.95% reduction in sulfate was initially observed but returned to near initial concentration by the 8th batch of AMD. Iron, aluminum, and copper were consistently lowered to concentration levels well below the standard set by the DENR Administrative Order (DAO) 2016-08, as amended by DAO 2021-19. Using PHREEQC, it was determined that the most common precipitates present in the effluent were Fe and Al minerals. Additionally, only 69% and 66% of Ca and SO4 were present as ions, respectively. Thus, the use of limestone, LMW, and concrete waste in sequence has the potential to be used as a passive treatment system, or a part thereof, for the removal of Fe, Al, and Cu in AMD.
Reference Key
persistent_1760654004_68f172b4438b2 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Turingan, Casey Oliver A.
Journal Malay Journal
Year 2023
DOI
DOI not found
URL
https://animorepository.dlsu.edu.ph/etdm_chemeng/10
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.