About Us | Help Videos | Contact Us | Subscriptions
 

Members of ASA, CSSA, and SSSA: Due to system upgrades, your subscriptions in the digital library will be unavailable from May 15th to May 22nd. We apologize for any inconvenience this may cause, and thank you for your patience. If you have any questions, please call our membership department at 608-273-8080.

 

Institutional Subscribers: Institutional subscription access will not be interrupted for existing subscribers who have access via IP authentication, though new subscriptions or changes will not be available during the upgrade period. For questions, please email us at: queries@dl.sciencesocieties.org or call Danielle Lynch: 608-268-4976.

Abstract

 

This article in JEQ

  1. Vol. 14 No. 4, p. 561-569
     
    Received: Sept 25, 1984


 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2134/jeq1985.00472425001400040018x

Plant Uptake of Trace Elements from Coal Gasification Ashes1

  1. C. W. Francis,
  2. E. C. Davis and
  3. J. C. Goyert2

Abstract

Abstract

Uptake of trace elements in annual ryegrass (L. multiflorum Lam.) grown in mixtures of three gasification ashes and two soils under greenhouse conditions is reported. The gasification ashes selected were those produced in fluidized-, fixed-, and entrained-bed gasification processes. Soils consisted of a surface agricultural soil and a subsurface weathered shale. Plant uptake was evaluated under two management regimes, with and without lime and fertilizer amendments. Six harvests were made over 180 d. Ryegrass yields were highly dependent on application of lime and fertilizer regardless of quantity or type of ash in the soil-ash mixtures. Yields from unlimed/unfertilized treatments were low because of the limited supply of N, P, and K and phytotoxic levels of Al, Cd, Ni, and Zn. The entrained-bed ash contained a relative high S concentration (38 g/kg) that oxidized and made the soil-ash mixtures very acid (pH < 4). Ryegrass grown in unlimed/unfertilized soil-ash mixtures of this ash contained very high concentrations of Al, B, Cd, Co, Mo, Ni, and Zn (up to 2449, 97, 24, 38, 5, 532, and 1109 mg/kg, respectively). Many of these concentrations were considered to be phytotoxic and/or sufficiently high to be toxic to animals under continuous long-term grazing conditions. However, applications of the same gasifier ash to soils that were limed and fertilized with N, P, and K produced ryegrass that did not contain phytotoxic levels of any of the trace elements examined or concentrations that would be of concern in the transport of these metals along foodchains to man. Risk was related to soil pH, a factor that can be managed with proper liming and fertilizing practices.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .