Study

A pilot study on remediation of sediments enriched by oyster farming wastes using granulated coal ash

  • Published source details Yamamoto T., Harada K., Kim K.H., Asaoka S. & Yoshioka I. (2015) A pilot study on remediation of sediments enriched by oyster farming wastes using granulated coal ash. Marine Pollution Bulletin, 90, 54-59

Actions

This study is summarised as evidence for the following.

Action Category

Add chemicals or minerals to sediments to remove or neutralise pollutants

Action Link
Subtidal Benthic Invertebrate Conservation
  1. Add chemicals or minerals to sediments to remove or neutralise pollutants

    A controlled study in 2008–2011 in one area of soft seabed in Hiroshima Bay, Japan (Yamamoto et al. 2015) found that adding coal ash to sediments to remove hydrogen sulphide increased combined invertebrate and fish abundance compared to untreated sediments in one of two comparisons, but did not change overall biomass over three years. Abundance at the site treated with Osaki coal ash was greater (41–496 individual/quadrat) than at the untreated site (14–281). The site treated with Onoda coal ash had similar abundance (29–262) to the untreated site. Combined invertebrate and fish biomass at the treated sites were similar (Osaki: 0.3–8.5 unit unspecified; Onoda: 0.3–9) to that of the untreated site (untreated: 0.6–13). In October 2008, two sites (75 x 50 m; 80 m apart) were treated with one of two types of coal ash (Onoda or Osaki; see study for details) to a depth of 20 cm and a third site (50 m away) was not treated. Every three months between February 2009 and November 2011, three sediment samples were collected at each site using a 25 x 25 cm quadrat to a depth of 20 cm. Both invertebrates and fish (>1 mm) were identified, counted, and weighed.

    (Summarised by: Anaëlle Lemasson)

Output references

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