Shen Lu, Jin Rushi, Chen Wanming, Qi Dongming, Zhai Shimin
Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Zhejiang Haoyu Technology Co., Ltd., Shaoxing 312000, China.
Materials (Basel). 2023 Sep 11;16(18):6155. doi: 10.3390/ma16186155.
Oil agents produced from the degreasing treatment of synthetic fibers are typical pollutants in wastewater from printing and dyeing, which may cause large-scale environmental pollution without proper treatment. Purifying oily dye wastewater (DTY) at a low cost is a key problem at present. In this study, biochar microspheres with oil removal ability were prepared and derived from waste bamboo chips using the hydrothermal method. The structure of the biochar microsphere was regulated by activation and modification processes. Biochar microspheres were characterized, and their adsorption behaviors for oily dye wastewater were explored. The results show that the adsorption efficiency of biochar microspheres for oily dye wastewater (DTY) was improved significantly after secondary pyrolysis and the lauric acid grafting reaction. The maximum COD removal quantity of biochar microspheres for DTY was 889 mg/g with a removal rate of 86.06% in 30 min. In addition, the kinetics showed that chemisorption was the main adsorption manner. Considering the low cost of raw materials, the application of biochar microspheres could decrease the cost of oily wastewater treatment and avoid environmental pollution.
合成纤维脱脂处理产生的油剂是印染废水中的典型污染物，未经适当处理可能会造成大规模环境污染。低成本净化含油染料废水（DTY）是目前的关键问题。本研究采用水热法以废弃竹屑为原料制备了具有除油能力的生物炭微球。通过活化和改性工艺调控生物炭微球的结构。对生物炭微球进行了表征，并探究了其对含油染料废水的吸附行为。结果表明，经过二次热解和月桂酸接枝反应后，生物炭微球对含油染料废水（DTY）的吸附效率显著提高。生物炭微球对DTY的最大化学需氧量去除量为889 mg/g，30分钟内去除率为86.06%。此外，动力学表明化学吸附是主要的吸附方式。考虑到原材料成本较低，生物炭微球的应用可以降低含油废水处理成本并避免环境污染。
