STUDY ON ADSORPTION OF HEAVY METALS BY RICE HUSK

Overview

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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:

• pollution by heavy metals have been frequently (4) are evaluated and the results are shown in Table
• confirmed in former factory sites. The purification 1. From Table 1, it can be seen that few alkali
• once opened, the mine drainage continues to flow Table 1 The cost and the ability for each alkaline
• treatment is suitable as a simple treatment method aqueous solution (Kobayashi et al.(8)). In addition,
• First, seven initial concentrations (3 ppm, 4 ppm, Freundlich: log Wi = log K F + log Ci (3)
• the mean value of 3 tests is adopted as a test result. shaking test. After that, the raw rice husks which
• ensure reproducibility, the mean value of 3 tests is Fig.3 shows that the amount of Cd adsorbed in the
• Table 4. as the concentration increases. It is confirmed that
• 3.1 Heavy Metals Adsorption Test Results medium concentration range. Water molecules are
• The adsorption isotherms obtained in the tests concentration range. As described in (13), liquid
• Fig.4, more than 90% of Zn, about 60% of Cu, and Cd. According to Freundlich model, it is clarified
• about 90% of Cd are extracted, which indicates that that the degree of adsorption ability of raw rice

Methods (brief)

• the solutions are analyzed by an ICP-AES. The test recover heavy metals which are valuable resources
• heavy metals. Langmuir and Freundlich models are analyzed by an ICP-AES. The difference between
• the solutions is analyzed in an ICP-AES. In order to husks to Cd is likely to be monolayer adsorption.
• Sample Rice nealy 1.0 g

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, non-predatory (sardines, anchovies, salmon, cod)
• Seaweed/kelp foods (nori, wakame, kombu, dulse — as food products)
• Mercury
• Cadmium
• Nickel

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.