污染土壤稳定化碳排放计算方法及案例研究

基于污染土壤稳定化全生命周期分析，确定碳排放核算边界，提出碳排放计算方法.稳定剂生产、基础设施建设、工程实施、稳定化土壤处置是污染土壤稳定化主要碳排放来源；方案设计、稳定化土壤养护和工程验收产生的碳排放量占总碳排放量的比例较小.基于提出的碳排放计算方法，评价了某砒霜厂遗留地块污染土壤原地异位稳定化的碳排放.结果表明，该工程总碳排放量为421516.31kg，稳定化每吨污染土壤的碳排放量为34.78kg；稳定剂原材料产生的碳排放是稳定化最主要的碳排放来源，占总碳排放量86.26%；其次为稳定剂原材料和稳定剂运输过程中运输工具能源消耗产生的碳排放，占总碳排放量10.82%.据此，研发低碳稳定剂和缩短材料运输距离是污染土壤稳定化碳减排的2个重要路径.

Carbon emission calculation method for contaminated soil stabilization and case study

The carbon emission calculation boundary was determined and the carbon emission calculation method was constructed based on the life cycle analysis of contaminated soil stabilization. Stabilizer production, infrastructure construction, filed application, and disposal of stabilized soil were the main source of carbon emission. The carbon emissions generated from scheme design, aging of the stabilized soil and effectiveness evaluation accounted for a small proportion. The carbon emission was accounted to 421516.31kg for an abandoned Arsenic plant contaminated soil ex-situ stabilization process, and 34.78kg for the stabilization of per ton contaminated soil. The raw material production of stabilizer was the most important carbon emission source of stabilization process, accounting for 86.26% of the total carbon emission, followed by the energy consumption of raw material and stabilizer transportations, accounting for 10.82% of the total carbon emission. Developing low-carbon stabilizer and shortening transportation distance are effective to reduce the carbon emission of contaminated soil stabilization.