Abstract

In order to study the adsorption of lead by biochar and its metal complexes, starch is carbonized. The adsorption of lead ion by biochar and the complexes bonded with titanium dioxide and the effect of carbonization temperature on the adsorption capacity of biochar are studied. The results show that the carbonization temperature of 800 °C can make the starch-based carbonized materials have strong adsorption capacity, while the adsorption capacity of the composite bonded with titanium dioxide at PH 6 is much higher than that of the pure biochar. With the continuous development of industry, the concentration of lead in sewage is getting higher and higher, which will affect the health of organisms and human beings in the long run. In wastewater treatment methods, biosorption is more convenient and safe. Starch has become a better raw material for biochar because of its abundant resources and low price. As a metal adsorbent with good adsorption effect, titanium dioxide has attracted extensive attention of many scholars and has good application effect in many fields. Therefore, in this study, Biochar and metal complexes are prepared by starch and titanium dioxide respectively, so as to obtain materials with strong adsorption capacity for lead ions, which has a positive effect on the treatment of lead ions in sewage.

摘要

为了研究生物炭及其金属配合物对铅的吸附，将淀粉碳化。研究了生物炭及其与二氧化钛结合的配合物对铅离子的吸附以及碳化温度对生物炭吸附能力的影响。结果表明，碳化温度为800°C可使淀粉基碳化材料具有较强的吸附能力，而二氧化钛结合的复合材料在PH 6时的吸附能力远高于纯生物炭。随着工业的不断发展，污水中铅的浓度越来越高，从长远来看将影响生物体和人类的健康。在废水处理方法中，生物吸附更为方便和安全。淀粉由于其丰富的资源和低廉的价格已成为一种更好的生物炭原料。二氧化钛作为一种具有良好吸附效果的金属吸附剂，引起了许多学者的广泛关注，并在许多领域具有良好的应用效果。因此，本研究采用淀粉和二氧化钛分别制备生物炭和金属配合物，从而获得对铅离子具有较强吸附能力的材料，对污水中铅离子的处理具有积极的作用。