{"type": "FeatureCollection", "features": [{"id": "10.1016/j.ibiod.2018.10.001", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:17:54Z", "type": "Journal Article", "created": "2018-10-11", "title": "Changes of sewage sludge digestate-derived biochar properties after chemical treatments and influence on As(III and V) and Cd(II) sorption", "description": "Abstract   This work seeks to extend the knowledge on the effect of chemical treatment of sewage sludge digestate (SSD)-derived biochar for the As(III and V) and Cd(II) sorption ability using potassium hydroxide (KOH) or hydrogen peroxide (H2O2). Results showed the increases of the pH of point of zero charge, the Brunauer-Emmett-Teller (BET) surface area and cation exchange capacity (CEC) after chemical treatment of biochar. The sorption ability was enhanced from 1.6\u202f\u03bcmol\u202fg\u22121 (As(V)) and 16.1\u202f\u03bcmol\u202fg\u22121 (Cd(II)) on raw biochar to 8.5\u202f\u03bcmol\u202fg\u22121 (As(V)) and 318.5\u202f\u03bcmol\u202fg\u22121 (Cd(II)) on KOH-modified biochar. Furthermore, arsenic redox distribution showed a large oxidation (70%) of As(III) to As(V) in KOH-biochar with batch washing, while a partial oxidation (7%) was observed in KOH-biochar with batch and subsequent column washing. The washing procedures after KOH treatment play an important role on arsenic sorption, due to the release of phosphate (PO43\u2212) as well as organic matter from the biochar that may subsequently lead to the oxidation of As(III) to As(V). Our findings highlight the potential influence of biochar on the redox transformation of As(III) to As(V) and therefore requires a careful assessment while investigating the fate of As in aquatic environments.", "keywords": ["[CHIM.MATE] Chemical Sciences/Material chemistry", "[SDE.IE]Environmental Sciences/Environmental Engineering", "[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering", "0211 other engineering and technologies", "600", "[CHIM.MATE]Chemical Sciences/Material chemistry", "02 engineering and technology", "Cd(II)", "Chemical activation", "01 natural sciences", "6. Clean water", "Sewage sludge digestate derived biochar", "12. Responsible consumption", "Biochar washing", "As(III)", "As(V)", "[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering", "[SDE.IE] Environmental Sciences/Environmental Engineering", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.ibiod.2018.10.001"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/International%20Biodeterioration%20%26amp%3B%20Biodegradation", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.ibiod.2018.10.001", "name": "item", "description": "10.1016/j.ibiod.2018.10.001", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.ibiod.2018.10.001"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-11-01T00:00:00Z"}}, {"id": "10.3390/ma14216566", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:23:28Z", "type": "Journal Article", "created": "2021-11-02", "title": "Influence of Pyrolysis Temperature on the Heavy Metal Sorption Capacity of Biochar from Poultry Manure", "description": "<p>Sorption properties of various biochars have been extensively investigated by many researchers. One of the parameters that have a significant impact on sorption properties is pyrolysis temperature. This paper presents a study on the effect of pyrolysis temperature (425, 575, 725 \uffc2\uffb0C) on the sorption properties of poultry-manure-derived biochar (BPM). The produced biochars, i.e., BPM425, BPM575 and BPM725, demonstrated specific properties at 425, 525 and 752 \uffc2\uffb0C such as high pH (10.40, 10.65 and 12.45), high ash contents (52.07, 61.74 and 78.38%) and relatively low BET (Brunauer, Emmett and Teller) surface area (11, 17 and 19 m2\uffc2\uffb7g\uffe2\uff88\uff921). The analysis of the mineral phases of the BPMs confirmed the buffering capacity. The investigated biochars were tested for sorption of Zn, Cd and Pb in mono-, double- and triple-metal batch sorption tests. According to the obtained results, biochar produced at a temperature of 575 \uffc2\uffb0C (BPM575) can function as a sufficient sorbent for the removal of Zn, Cd and Pb from a water solution. The presented results do not confirm the effect of competing metal ions on the sorption efficiency of the selected metals by the investigated biochars. Based on that, the studied biochar sorbents can be used in environments contaminated with many metals.</p>", "keywords": ["ADSORPTION", "sorption", "pyrolysis temperature", "poultry manure", "0211 other engineering and technologies", "02 engineering and technology", "PERFORMANCE", "FEEDSTOCK SOURCES", "01 natural sciences", "AQUEOUS-SOLUTION", "Article", "MECHANISMS", "CARBON", "Chemistry", "poultry manure; biochar; pyrolysis temperature; sorption; heavy metals; soil contamination", "REMOVAL", "Earth and Environmental Sciences", "CD(II)", "STRAW", "biochar", "heavy metals", "FRACTIONS", "soil contamination", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://www.mdpi.com/1996-1944/14/21/6566/pdf"}, {"href": "https://www.mdpi.com/1996-1944/14/21/6566/pdf"}, {"href": "https://doi.org/10.3390/ma14216566"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Materials", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/ma14216566", "name": "item", "description": "10.3390/ma14216566", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/ma14216566"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-11-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=CD%28II%29&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=CD%28II%29&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=CD%28II%29&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=CD%28II%29&offset=2", "hreflang": "en-US"}], "numberMatched": 2, "numberReturned": 2, "distributedFeatures": [], "timeStamp": "2026-06-26T23:20:42.183318Z"}