Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Bd. V. Parvan No. 6, 300223 Timisoara, Romania.
Int J Environ Res Public Health. 2021 Jun 18;18(12):6585. doi: 10.3390/ijerph18126585.
The sustainable economy framework imposes the adoption of new ways for waste reuse and recycling. In this context, this paper proposes a new alternative to obtain glass fertilizers (agriglasses) by reusing two cheap and easily available wastes, wood ash and manganese rich sludge resulting from drinking water treatment processes for groundwater sources. Glasses were obtained using different amounts of wastes together with (NH)HPO and KCO as raw materials. The P-K-Mn nutrient solubilization from the obtained glasses was investigated using a citric acid solution. The kinetics of the leaching process was studied after 1, 7, 14, 21 and 28 days, respectively. The intraparticle diffusion model was used to interpret kinetic data. Two distinct stages of the ion leaching process were recorded for all of the studied compositions: first through intraparticle diffusion (the rate-controlling stage) and second through diffusion through the particle-medium interface. The fertilization effect of the obtained agriglasses was studied on a barley crop. The specific plant growth parameters of germination percentage, average plant height, biomass and relative growth rate were determinate. The positive impact of the agriglasses upon the plants biomass and relative growth rate was highlighted. The effects of agriglasses can be tuned through glass compositions that affect the solubility of the nutrients.
可持续经济框架要求采用新的废物再利用和回收方法。在这种情况下，本文提出了一种新的替代方法，通过再利用两种廉价且易得的废物——来自地下水水源饮用水处理过程的木灰和富含锰的污泥，来获得玻璃肥料（agriglass）。使用不同量的废物以及(NH)HPO 和 KCO 作为原料来获得玻璃。使用柠檬酸溶液研究了从获得的玻璃中释放出的 P-K-Mn 养分的溶解情况。研究了分别在 1、7、14、21 和 28 天后的浸出过程动力学。使用内扩散模型来解释动力学数据。对于所有研究的组成，记录了离子浸出过程的两个不同阶段：首先是通过内扩散（控制速率阶段），其次是通过颗粒-介质界面的扩散。研究了获得的 agriglass 在大麦作物上的施肥效果。确定了发芽率、平均株高、生物量和相对生长率等特定植物生长参数。突出了 agriglass 对植物生物量和相对生长率的积极影响。通过影响养分溶解度的玻璃组成，可以调整 agriglass 的效果。
