EFFECT OF ORGANIC WASTE AMENDMENTS ON ZINC ADSORPTION BY TWO SOILS

摘要: Two soils (fine and coarse textured) were amended with five organic wastes or humic acid. One adsorption experiment was carried out at 1 mmol L[sup [minus]1] Zn pH levels from 4 to 8. A second 6 0 mmol/L[sup Zn. The greatest variation in among treatments came 6, a lesser range for the fine textured soil (pH 5--6) wider sandy 5--7). Adsorption followed two-site Langmuir model, maxima higher finer compared soil. not changed by soil, but all increased over controls Zinc poultry litter lower than control Industrial sewage sludge acid more did commercial compost, spent mushroom cotton litter. It concluded that materials have influence on most will increase adsorption, whereas those high soluble C can decrease adsorption.