Key Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong, 518055, China.
Department of Environmental Engineering, College of Ocean Sciences, Jeju National University, Jeju Special Self-Governing Province, 63243, Republic of Korea.
Environ Pollut. 2020 May;260:114074. doi: 10.1016/j.envpol.2020.114074. Epub 2020 Jan 28.
The total plastic waste generation in China has not been reported due to a lack of information on diverted recyclable wastes. This study was conducted with two objectives: to identify the characteristics of plastic waste generation, recycling, and compositions in informal and formal waste management sectors in selected Shenzhen (SZ) and Honghuatao Town (HT) study areas in China and to measure the leachability of the heavy metals of waste plastics using the synthetic precipitation leaching procedure (SPLP) and leaching tests with different pHs. The results showed that film plastic waste occupied the largest proportion among plastic components in the mixed MSW. It is estimated that the plastic waste generation rates in SZ and HT were 0.20-0.33 kg/capita/day and 0.08-0.14 kg/capita/day, respectively. The plastic recycling rates of SZ and HT ranged from 6.24 to 11.93% and 16.84-33.31%, respectively. Among the measured heavy metals, Ba, Zn, Cu, Mn contents were high in most plastic samples. In addition, Mn, Pb, Ni, and Zn in plastic wastes occasionally exceeded Chinese national drinking water standards in the different pH leaching tests and SPLP. Therefore, it is suggested that plastic waste should be managed in a controlled manner.
由于缺乏有关转移可回收废物的信息，中国尚未报告其总塑料废物产生量。本研究旨在确定选定的中国深圳（SZ）和红花园镇（HT）研究区域的非正式和正式废物管理部门中塑料废物产生、回收和组成的特征，并使用合成沉淀浸出程序（SPLP）和不同 pH 值的浸出试验来测量废塑料中重金属的浸出率。结果表明，薄膜塑料废物在混合 MSW 中的塑料成分中占据最大比例。据估计，SZ 和 HT 的塑料废物产生率分别为 0.20-0.33 kg/人/天和 0.08-0.14 kg/人/天。SZ 和 HT 的塑料回收率分别在 6.24%至 11.93%和 16.84%至 33.31%之间。在所测量的重金属中，大多数塑料样本中 Ba、Zn、Cu 和 Mn 的含量较高。此外，在不同 pH 值浸出试验和 SPLP 中，塑料废物中的 Mn、Pb、Ni 和 Zn 偶尔会超过中国国家饮用水标准。因此，建议以受控的方式管理塑料废物。
