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Here we show that large-scale spontaneous sequestration of nickel occurs in a low-cost calcium silicate hydrate material (CS) under mild conditions. CS takes up Ni\n                    <jats:sup>2+<\/jats:sup>\n                    ions rapidly from aqueous solution to achieve loadings as high as 440\u00a0kg Ni per tonne CS. This chemistry brings new opportunities in nickel recycling, recovery and environmental clean-up. The Ni sequestration reaction of CS is similar to that previously described (A Hamilton et al.,\n                    <jats:italic>Scientific Reports<\/jats:italic>\n                    (2024) 14:7052) for cobalt, although it is about four times faster. Full kinetic and reaction product data are reported. The reaction provides an easy synthesis route to a new Ni-phyllosilicate with a high metal loading, one of a class of materials in active development as catalysts for process-scale water-splitting and reforming reactions.\n                  <\/jats:p>","DOI":"10.1038\/s41598-026-51622-8","type":"journal-article","created":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T09:42:42Z","timestamp":1783417362000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A low-cost calcium silicate hydrate with an exceptionally large sequestration capacity for aqueous divalent nickel"],"prefix":"10.1038","volume":"16","author":[{"given":"Han","family":"Zhou","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pieter","family":"Bots","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bao","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher","family":"Hall","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea","family":"Hamilton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,7]]},"reference":[{"key":"51622_CR1","volume-title":"Critical materials for strategic technologies and sectors in the EU - a foresight study","author":"European Commission","year":"2020","unstructured":"Commission, European. 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