Feng Yiyang, Zhao Di, Qiu Shangkai, He Qiuping, Luo Yuan, Zhang Keqiang, Shen Shizhou, Wang Feng
Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
Dali Agro-Environmental Science Station, Ministry of Agriculture and Rural Affairs, Dali 671004, China.
ACS Omega. 2021 Nov 23;6(48):33046-33056. doi: 10.1021/acsomega.1c05191. eCollection 2021 Dec 7.
Sheep manure and oyster shells as C and Ca sources, respectively, were used to obtain Ca-enriched biochar materials with a high dephosphorization efficiency. This approach is helpful for the utilization of livestock manure and shell solid waste as well as for creating highly adsorbent materials. The results show that as the Ca content in biochar was increased, the material's phosphate adsorption capacity increased. The maximum adsorption efficiency reached 94%. The highest adsorption capacity (calculated using Langmuir fitting) of the material containing 1:1 biochar/oyster shell weight ratio reached 146.3 mg P/g. With the increase of the pH value of phosphate solution, the adsorption capacity of the sample gradually increased to 89.5-93.3 mg P/g. The adsorption occurred mainly by complexation. The results of this work provide insights into livestock manure and shell solid waste utilization, which yields a material with useful adsorption properties that can be applied for the removal of phosphate and other inorganics from water.
分别以羊粪和牡蛎壳作为碳源和钙源，用于制备具有高脱磷效率的富钙生物炭材料。这种方法有助于畜禽粪便和贝壳固体废物的利用，以及制备高吸附性材料。结果表明，随着生物炭中钙含量的增加，材料对磷酸盐的吸附能力增强。最大吸附效率达到94%。生物炭与牡蛎壳重量比为1:1的材料的最高吸附容量（采用朗缪尔拟合计算）达到146.3 mg P/g。随着磷酸盐溶液pH值的升高，样品的吸附容量逐渐增加至89.5 - 93.3 mg P/g。吸附主要通过络合作用发生。这项工作的结果为畜禽粪便和贝壳固体废物的利用提供了思路，得到了一种具有有用吸附性能的材料，可用于去除水中的磷酸盐和其他无机物。
