Construction of Technosols by aggregating various inorganic and organic solid wastes

• Published in: Journal of agricultural resources and environment 2023-01, Vol.40 (2), p.445
• Main Authors: Zhou, Yang, Liu, Yingchun, Yu, Shan, Wang Chenyuan, Yin Weiqin, Xu, Qiao, Wang Shengsen, Wang, Xiaozhi
• Format: Article
• Language: Chinese
• Subjects: Aggregates; Cadmium; Composting; Fly ash; Heavy metals; Household wastes; Moisture content; Nutrient content; Nutrients; Organic carbon; Organic soils; Organic wastes; pH; Phosphorus; Physicochemical properties; Plant growth; Potassium; Sediment pollution; Sewage disposal; Sewage sludge; Soil chemistry; Soil contamination; Soil nutrients; Soil pH; Soil pollution; Soil remediation; Soil stability; Soils; Solid wastes; Total organic carbon; Vermicomposting; Water content; Worms; Zinc
• ISSN: 2095-6819; 2095-6819
• DOI: 10.13254/j.jare.2022.0129

为拓展固体废物的利用途径，以生活污泥、蚯蚓粪、秸秆、粉煤灰、煤渣为原料通过为期3个月的室内恒温培养来制备技术新成土，研究不同原料配比对技术新成土理化性质的影响。结果表明：制备的技术新成土pH在7.08~7.69之间，水稳性团聚体总量为49.83%~86.44%，团聚体破碎率为13.10%~32.20%，平均质量直径和几何平均直径分别为0.54~1.04 mm和0.54~0.89 mm。培养后技术新成土的氮、磷、钾速效养分分别下降了11.03%~38.08%、5.79%~25.06%、0.11%~10.52%，总有机碳含量在5.26%~8.74%之间，整体养分含量处于较高水平。DTPA提取态Zn含量升高了15.74%~102.40%，DTPA提取态Cd含量降低了17.39%~65.02%。生物毒性实验表明有9种处理不会对植物生长产生明显影响，有3种处理需要对配方进行调整。综合pH、团聚体总量及稳定性、养分含量来看，所制备的技术新成土的性质基本达到了自然土壤的正常范围，可以用于土壤复垦、改良或代替部分自然土壤。污泥会导致处理中重金属Zn含量较高，因此制备的技术新成土应避免种植蔬菜、粮食等农作物。To expand the utilization of solid wastes, this study aimed to construct Technosols using aggregates from domestic sludge, vermicompost, straw, fly ash, and coal cinder, post a three-month constant-temperature incubation, and to elucidate the physicochemical properties of the constructed Technosols of various sizes. The results showed that the pH of the Technosols ranged from 7.08-7.69 the total amount of water-stable aggregates was 49.83%-86.44% the percentage of aggregate destruction was 13.10%-32.20% and the mean