POU devices in large buildings: Lead removal and water quality
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The performance of point‐of‐use (POU) devices to remove dissolved and particulate lead (Pb) and their effect on tap water quality were investigated in a large building under typical usage patterns and during one year. Both forms of Pb were efficiently removed, although materials downstream of the POU devices slightly increased total Pb levels at the tap. No evidence of POU breakthrough was observed following stagnations carried out before sampling. Although measurements of heterotrophic place counts and total and live bacteria on the POU material itself indicated no significant colonization, small but significant increases in viable bacteria at the tap suggest that colonization occurred in the piping and tap downstream of the POU devices in the absence of chlorine residual. This study suggests that these devices are a useful remediation approach to control Pb in large buildings, providing that building maintenance procedures are issued for POU devices.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it