Engineering Technology Center for Pollution Prevention and Control of Taizhou, Taizhou University, Jiaojiang, 318000, China.
Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Gongshang University, Hangzhou, 310018, China.
Chemosphere. 2023 Dec;344:140429. doi: 10.1016/j.chemosphere.2023.140429. Epub 2023 Oct 11.
Due to the lack of normalized management, industrial waste is often co-disposed at open solid waste dumping sites, which could aggravate the groundwater pollution. In this study, 5 practical open solid waste dumping sites dealing with municipal solid wastes (MSW) (2 of 5) and industrial wastes mixed with MSW (3 of 5) were chosen to investigate the effect of waste co-disposal on the groundwater contamination. The industrial waste was mainly from rubber production, leather production, machinery industry, pharmaceutical industry and plastic production. 3 to 6 groundwater wells were excavated from each dumping site and 148 indices were analyzed, including regular chemicals, heavy metals, biological pollutants, volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs) and pesticide residues. Nemerow index analysis showed that 5 indices were severely polluted in the groundwater from every industrial waste co-disposal landfill, while only 0 and 1 severely polluted index was found for the two MSW landfill, respectively. The principal component analysis (PCA) analysis indicated that 2 biological pollutant (plate-counting bacteria (TPB) and total coliforms (TCs)), 4 chemical pollutants (permanganate index, ammonia, S and petroleum) were closely connected with the disposal of industrial waste. Besides, co-disposal of industrial waste also brought in series of PAHs and dichloromethane, with di(2-ethylhexyl)phthalate exceeding the standard limit (10.5 mg L). Attention should be paid to TPB and TCs, whose maximal concentrations exceeded the standard limit by extraordinary 3200 and 1600 times, respectively. The distribution pattern of the pollutants showed that the biological pollutants at the downstream area, and chemical pollutants at the leakage points exhibited the highest concentration, which indicated the downstream area and seepage points should be specially concerned for the industry waste co-disposed dumping sites.
由于缺乏规范化管理，工业废物经常与城市固体废物（MSW）在开放的固体废物倾倒场中混合处置，这可能会加剧地下水污染。在本研究中，选择了 5 个实际的开放固体废物倾倒场来处理城市固体废物（MSW）（其中 2 个）和混合有 MSW 的工业废物（3 个），以研究废物混合处置对地下水污染的影响。工业废物主要来自橡胶生产、皮革生产、机械工业、制药工业和塑料生产。从每个倾倒场挖掘了 3 到 6 口地下水井，并分析了 148 个指标，包括常规化学物质、重金属、生物污染物、挥发性有机化合物（VOCs）、半挥发性有机化合物（SVOCs）和农药残留。内梅罗指数分析表明，每个工业废物混合处置垃圾填埋场的地下水有 5 项指标受到严重污染，而两个 MSW 垃圾填埋场分别只有 0 项和 1 项严重污染指标。主成分分析（PCA）分析表明，2 种生物污染物（平板计数细菌（TPB）和总大肠菌群（TCs））、4 种化学污染物（高锰酸盐指数、氨、S 和石油）与工业废物的处置密切相关。此外，工业废物的混合处置还带来了一系列多环芳烃和二氯甲烷，其中邻苯二甲酸二（2-乙基己基）酯超过标准限值（10.5mg/L）。应注意 TPB 和 TCs，其最大浓度分别超过标准限值 3200 倍和 1600 倍。污染物的分布模式表明，下游区域的生物污染物和泄漏点的化学污染物浓度最高，这表明下游区域和渗漏点应特别关注工业废物混合处置倾倒场。
