Effects of DOM on Sorption of Polar Compounds to Soils:Sulfapyridine as a Case Study
Sorptive behavior of sulfapyridine (SPD) in three organic-poor soils having different mineral compositions was investigated.The effects of adding biosolids-derived compost extract (dissolved organic matter,DOM) on SPD sorption to soil were evaluated.The primary goal was to discern between effects caused by DOM,pH and ionic composition.SPD sorption in the three-phase (soil-DOM-SPD) systems was shown to decrease relative to non-DOM amended soils,when DOM and SPD were co-introduced to soil.This trend intensified with increasing pH as well as with increasing ionic strength.However,when DOM was applied prior to SPD,allowing for DOM sorption onto soil,only slight reduction in SPD sorption was observed with two of the soils.For the soil representing the weakest sorbent,the DOM pre-treatment significantly increased SPD sorption.Finally,compost extract application was clearly demonstrated to affect the chemical properties of both SPD and its sorbents.Therefore,it may be necessary to consider soil chemical conditions in any attempt of assessing the effects of organic amendment on the sorption of polar contaminants.
Dissolved organic matter (DOM) Sulfapyridine (SPD) Sorption Desorption Soil and solution properties
Hai Haham Adi Oren Benny Chefetz
Department of Soil and Water Sciences,Faculty of Agriculture,Food and Environment,The Hebrew University of Jerusalem,P.O.Box 12,Rehovot 76100,Israel
国际会议
the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))
杭州
英文
395-397
2012-09-09（万方平台首次上网日期，不代表论文的发表时间）