statistics show that concentrations of toxic metals in metals are removed. We argue that the view on organic

Overview

This source page is a mechanical bulk-ingest record for a PDF in the methylmercury infant-formula research pull. It preserves source-level identity, routeable product/analyte scope, and exact extracted numeric lines for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.

Key numbers

The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:

• to 90 %, since the 1970s, due to environmental the urban–rural nutrient cycle, since only recycling urban
• to only about 20 % of the total amount produced. in future.
• STORY recorded in official statistics in the period 1970–2010
• 2014). Pollutants in sewage sludge can limit its agricultural concentrations in sewage sludge.
• perceptions, use of sewage sludge in agriculture varies sources: domestic, commercial and runoff (EC 2001,
• the dominant disposal option. input from faeces. Faecal matter contains, on average, 2 mg
• Since 1986, land application of sewage sludge within the Cd, 70 mg Cu, 10 mg Pb and 250 mg Zn per kg dry matter
• European Union has been governed by Council Directive (EC 2001, Chap. 1). Other main sources of metals in
• No. 86/278/EEC. It prescribes prior testing of sludge and domestic wastewater are bodycare products, pharmaceuti-
• national legislation of member states, most of which have set time (Fig. 1). The major reasons for this are discussed
• et al. 2015), in order to protect soils and reduce possible Silver is used in jewellery, cutlery, coins, electrical
• emissions (e.g. Pacyna et al. 2006; Thevenon et al. 2011). contacts and conductors. Moreover, until a couple of years
• metal concentrations in soil to levels toxic to soil microor- from around 40 to on an average 2.3 mg Ag per kg dry
• ganisms and affect biological processes (Giller et al. 1998). sludge since the 1990s (Diener and Palme 2012), see Fig. 1.
• Brookes and McGrath 1984; Witter et al. 1993) and the antibacterial compound that is leached out with laundry
• activity of nitrogen-fixing bacteria, both free-living forms water (KEMI 2011a).
• 1988; Mårtensson and Witter 1990). surfaces to prevent corrosion, in rechargeable nickel–cad-
• to impose strict regulations on agricultural use of sewage use of Cd was banned in 1985 in Sweden (SFS 1985) and is
• sludge at national (e.g. Sweden: SNFS 1994) and regional restricted in Europe under the REACH regulations
• pollutants to wastewater (SWWA 2014) and lowering the sludge between 1970 and 1990 from about 10 to 2 mg Cd
• permissible concentrations of metals in sludge (NV 2013) per kg dry matter was probably due to the result of this ban
• have been the guiding principles in work to control and on cadmium. A further decline to a mean value of 1 mg Cd
• Decline in heavy metals in Swedish sewage sludge 2009), reducing the deposition load.
• since 1970 Copper, which is an essential element for organisms, is
• metals in sludge from sewage treatment plants in the four ström 1998). In certain areas, drinking water releases Cu
• Ag content (mg kg -1dry matter) Cd content (mg kg -1 dry matter) Cu content (mg kg -1dry matter)
• 40 2000 Mean 2012
• 20 -1 Mean 2012
• Hg content (mg kg -1 dry matter) Pb content (mg kg -1 dry matter) Zn content (mg kg -1 dry matter)
• 4 Mean 2012 Mean 2012 Mean 2012
• Fig. 1 Decline in the concentrations of silver, cadmium, copper, mercury, lead and zinc in Swedish sewage sludge over time (1970–2010). Mean
• 1987, 1990, 1992, 1995, 2012) with additional information from Sveder (2002), Ernst-Olof Swedling, Kungsängsverket, Uppsala (pers. comm. 1
• Dec. 2011), Lars Nordén, Gryyab, Gothenburg (pers. comm. 14 April 2014) and Mats Thuresson, Stockholm County Administrative Board (pers.
• and sewage sludge. The steep declines in Cu concentrations around 250 mg to on average 22 mg Pb per kg sludge dry
• in sewage sludge within a few years (Fig. 1) are explained matter. Replacement of old lead pipes for drinking water
• dissolution. Mean values of 350 mg Cu per kg sludge dry concentrations in sludge.
• a total ban on the use of Hg was implemented in 2009 (KEMI ing zinc chloride, antifouling paints with zinc pyrithione
• 2011b). Collection of Hg (e.g. thermometers, amalgam and runoff from galvanised roofs. The exponential decrease
• separators at dental practices) for appropriate disposal, in Zn in sewage sludge since 1970, from around 3000 to
• measures to limit emissions from waste, coal and other 600 mg Zn per kg sludge dry matter, may have a number of
• values of around 4 mg in the 1970s have dropped to 0.6 mg industrial outflows are probably the main reasons.
• Hg per kg sludge dry matter in 2012. In summary, the quality of sewage in terms of heavy

Methods (brief)

• solutions. The large volumes of sewage sludge collected in
• kg dry matter) is identified limiting application of sewage these sites are generally much lower than in soil samples
• Chartered Institution of Water and Environmental Management. Grimm, N.B., S.H. Faeth, N.E. Golubiewski, C.L. Redman, J. Wu, X.
• Pacyna, J.M., E.G. Pacyna, and W. Aas. 2009. Changes of emissions measurement in soil: An improved method. Soil Biology &

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

Wiki pages this source may touch

• Fish — marine, predatory (tuna, swordfish, shark, king mackerel)
• Fish — marine, non-predatory (sardines, anchovies, salmon, cod)
• Mercury
• Cadmium
• Lead
• Nickel
• Aluminum

Verification notes

• Identity check: DOI, raw handle, candidate cite-key, and SHA-256 were compared against existing wiki/sources/ pages before creation.
• Full-PDF read: pdftotext -layout was run on the full PDF twice; extracted text hashes matched before the page was written.
• Numeric verification: numeric/table-bearing lines were selected mechanically from the verified extraction and preserved without unit conversion or rounding.
• Brand firewall: the worker skips PDFs when extracted numeric lines appear brand/manufacturer-sensitive; this page contains category-level or species-level evidence only.
• HMTc firewall: no threshold, percentile, pass/fail, clean/dirty, or certification math is stated.

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.