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This research focused on the contents of the five most bio-toxic heavy metals, As, Cd, Hg, Cr, and Pb of 26 municipal solid waste (MSW) samples from the Eastern Guangdong Area. To investigate the apportion of the heavy metal source, Pearson correlation and principal component analysis (PCA) were introduced as major approaches. The health risks posed to MSW workers exposed to heavy metals in MSW were assessed using a Monte Carlo simulation combined with the US Environmental Protection Agency Health Risk Assessment Model. The As, Cd, Hg, Cr, and Pb contents of the east Guangdong MSW were (0.76 ± 0.75), (2.14 ± 4.44), (0.11 ± 0.14), (55.42 ± 31.88), and (30.67 ± 20.58) mg/kg, respectively. Hg, Cr, and Pb were potentially derived from glass, textile, food waste, and white plastic, while As and Cd were mainly derived from soil and food waste in the MSW. The non-carcinogenic risks of heavy metal in MSW exposure to MSW workers could be ignored. However, the heavy metals in MSW might pose carcinogenic risks, with the probabilities for male and female workers being 35% and 45%, respectively. The non-carcinogenic and carcinogenic risk indices were slightly higher for female workers under the same exposure situations.
Zhihua Tang; Minru Liu; Linzi Yi; Huafang Guo; Tingping Ouyang; Hua Yin; Mingkun Li. Source Apportionment and Health Risk Assessment of Heavy Metals in Eastern Guangdong Municipal Solid Waste. Applied Sciences 2019, 9, 4755 .
AMA StyleZhihua Tang, Minru Liu, Linzi Yi, Huafang Guo, Tingping Ouyang, Hua Yin, Mingkun Li. Source Apportionment and Health Risk Assessment of Heavy Metals in Eastern Guangdong Municipal Solid Waste. Applied Sciences. 2019; 9 (22):4755.
Chicago/Turabian StyleZhihua Tang; Minru Liu; Linzi Yi; Huafang Guo; Tingping Ouyang; Hua Yin; Mingkun Li. 2019. "Source Apportionment and Health Risk Assessment of Heavy Metals in Eastern Guangdong Municipal Solid Waste." Applied Sciences 9, no. 22: 4755.
The reduced natural waters and the large amount of wastewater produced by textile industry necessitate an effective water reuse treatment. In this study, a combined two-stage water reuse treatment was established to enhance the quality and recovery rate of reused water. The primary treatment incorporated a flocculation and sedimentation system, two sand filtration units, an ozonation unit, an ultrafiltration (UF) system, and a reverse osmosis (RO) system. The second treatment included an ozonation unit, a sand filtration unit, and UF and RO systems. The color removal rate increased with the increasing ozone dosage, and the relational expression between the ozone dosage and color removal rate was fitted. Ozonation greatly reduced the color by 92.59 and 97.27 times during the primary and second ozonation stages, respectively. RO had the highest removal rate. The combined processes showed good performance in water reuse treatment. The treated, reused water satisfied the reuse standard and surpassed the drinking water standard rates for chemical oxygen consumption (CODcr), color, NH3-N, hardness, Cl−, SO42−, turbidity, Fe3+, and Cu2+. The operating cost of reuse water treatment was approximately 0.44 USD·m−3.
Hua Yin; Peiwen Qiu; YuanGe Qian; Zhuwen Kong; Xiaolong Zheng; Zhihua Tang; Huafang Guo. Textile Wastewater Treatment for Water Reuse: A Case Study. Processes 2019, 7, 34 .
AMA StyleHua Yin, Peiwen Qiu, YuanGe Qian, Zhuwen Kong, Xiaolong Zheng, Zhihua Tang, Huafang Guo. Textile Wastewater Treatment for Water Reuse: A Case Study. Processes. 2019; 7 (1):34.
Chicago/Turabian StyleHua Yin; Peiwen Qiu; YuanGe Qian; Zhuwen Kong; Xiaolong Zheng; Zhihua Tang; Huafang Guo. 2019. "Textile Wastewater Treatment for Water Reuse: A Case Study." Processes 7, no. 1: 34.