热解温度对染色污泥特性的影响  

Effect of pyrolysis temperature on characteristics of dyeing sludge

作　　者：张鸣艳[1] 李正[2] ZHANG Mingyan;LI Zheng(Suzhou Vocational University,Suzhou 215104,China;Soochow University,Suzhou 215123,China)

机构地区：[1]苏州市职业大学,江苏苏州215104 [2]苏州大学,江苏苏州215123

出　　处：《印染助剂》2022年第7期31-35,共5页Textile Auxiliaries

基　　金：2021年度国家社科基金艺术学项目(21BG124)。

摘　　要：将印染后产生的染色污泥(TDS)在300~700℃下进行热解,研究TDS生物炭中重金属(Zn、Cu、Cr、Ni、Cd和Mn)的风险。采用BET-N_(2)、FTIR和BCR顺序提取程序对重金属进行特征分析和潜在的环境风险评价。结果表明,随着热解温度的升高,TDS的热解处理有助于提高pH和增大比表面积。TDS转化为生物炭,显著降低了H/C和O/C比值,导致TDS衍生生物炭具有更强的炭化和更高的芳香缩合。生物炭中的锌、铜、铬、镍、锰的总含量随着TDS中有机物的热分解而升高;而当温度升高至600℃时,生物炭中分布的Cd显著减少。然而,通过BCR序列提取和分析发现,热解促进了化学物种形成和生物炭的变化。The risk of heavy metals(Zn,Cu,Cr,Ni,Cd and Mn)in TDS biochar was studied by pyrolysis at 300~700℃.The characteristics and potential environmental risk of heavy metals were analyzed by BET-N_(2),FTIR and BCR sequential extraction procedures.The results showed that the pyrolysis of TDS contributes to the increase of pH and specific surface area as the pyrolysis temperature increases.The conversion of TDS to biochar significantly reduced the H/C and O/C ratios,resulting in stronger carbonization and higher aromatic condensation of TDS-derived biochar.The total contents of Zinc,copper,chromium,nickel and manganese in biochar increased with the thermal decomposition of organic matter in TDS.When the temperature increased to 600℃,the distribution of Cd in biochar decreased significantly.However,BCR sequence extraction and analysis showed that the pyrolysis process promoted chemical speciation and biochar changes.

关 键 词：染色污泥 化学形态分析 创新设计 

分 类 号：X705[环境科学与工程—环境工程]