铁改性芦苇炭对水体磷酸盐的吸附效果研究

Research on Adsorption of Phosphate from Water onto Iron Modified Reed Biochar

利用水生植物芦苇通过限氧炭化的方式制备芦苇炭,并用氯化铁对其进行改性,研究了其对水体中磷酸盐的吸附能力。结果表明,铁改性芦苇炭对磷酸盐的吸附能力随铁炭比增加呈现先增加后下降的趋势,对磷酸盐的去除率随芦苇炭投加量的增加而增大,且符合准二级动力学模型,不同的共存离子对其吸附的影响存在差异。

Reed biochar was prepared by hydrophyte reed through oxygen-limited carbonization,and was modified with ferric chloride which studied the water adsorption capacity of phosphate.The results showed that with the increase of iron-carbon ratio,the adsorption capacity of reed biochar to phosphate increased,and the adsorption capacity would decrease if iron loading is too large.It was also found that it was beneficial to the removal of phosphate by increasing the amount of biochar.The results showed that the adsorption of phosphate by this biochar followed pseudo-secondary adsorption kinetics and there were different effect on the coexistence of some ions on the adsorption capacity of iron-modified reed biochar.