Removal effect and mode of organic matter and total phosphorus in water body by construction waste
By studying the removal effect and action mode of four kinds of construction wastes,namely aerated block,concrete,mortar and red brick,it is found that all four kinds of construction wastes can remove organic matter and total phosphorus(TP)in water,among which aerated block(average removal rate＞50%,removal amount is 0.33 mg/g)and red brick(average removal rate＞35%,removal amount is 0.22 mg/g).Mortar(average removal rate＞70%,removal amount up to 0.018 mg/g)and aerated block(average removal rate over 45%,removal amount up to 0.013 mg/g)have higher TP removal effect.All four kinds of construction waste may remove organic matter by physical adsorption of hydrated organic matter,aerated block,concrete and mortar may remove TP by precipitation-generating chemical adsorption of calcium phosphate,and red brick may remove TP by surface complexation chemical adsorption of aluminum phosphate.It is helpful to deepen the understanding of the mechanism of construction waste used in water pollution control and help improve its technical parameters.
construction wasteorganic matterphosphoruseffectmechanism
国家科技期刊平台
NSTL
万方数据
