Evidence item

The 250 ± 30 t CO2e value is a 98-day gross, control-relative estimate for additional calcite within an existing Norwegian liming programme, with phosphate as an exception among measured water-quality indicators and site-specific applicability. MEASUREMENT

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 25500

Source: Quantified Carbon Dioxide Removal from an Alkalinity Addition Field Trial in the Kvina River, Norway · locator {} · excerpt hash sha256:7b30a8e2fcc71402438c212d224bfb3228d3a59cabc41d6ff5331c2da68f323e

Exact excerpt

The 98-day river alkalinity enhancement trial was conducted in the Kvina River, Norway, within an existing liming programme. An additional 1,480 tonnes of calcite raised the existing pH from 6.0 to 6.8. CDR was quantified by comparing the increase in alkalinity export at the river mouth with a limed control site. The trial generated 250 ± 30 tonnes CO2-equivalent of gross CDR, or 54% of the theoretical maximum. Apart from phosphate, no other measured nutrients, trace metals, or adverse water-quality indicators increased significantly. The findings are explicitly described as site-specific to hydrology, feedstock, and lifecycle conditions.

Linked claims

Claim	Direction	Relevance	Steps	Counted
11b54403	QUALIFY	DIRECT	0	yes

Audits

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