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Li Ying Lin Tai-Yu Chiu Yung-ho Cen Hongyi Lin Yi-Nuo 《Environmental science and pollution research international》2021,28(16):20093-20110
Environmental Science and Pollution Research - The demand for energy has continued to increase because of global economic development, which has led to rising fuel prices and continued pollution... 相似文献
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Shengyong Lu Liqin Yang Fa Zhou Fei Wang Jianhua Yan Xiaodong Li Yong Chi Kefa Cen 《环境科学学报(英文版)》2013,25(10):2088-2092
A novel system combining sludge drying and co-combustion with coal was applied in disposing sludge and its atmospheric emission characteristics were tested. The system was composed of a hollow blade paddle dryer, a thermal drying exhaust gas control system, a 75 tons/hr circulating fluidized bed and a flue gas cleaning system. The emissions of NH3, SO2, CH4 and some other pollutants released from thermal drying, and pollutants such as NOx, SO2 etc. discharged by the incinerator, were all tested. Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in the flue gas from the incinerator were investigated as well. The results indicated that the concentrations of NOx and SO2 in the flue gas from the incinerator were 145 and 16 mg/m^3, respectively, and the I-TEQ concentration of 2,3,7,8-substitued PCDD/Fs was 0.023 ng I-TEQ/Nm^3. All these values were greatly lower than the emission standards of China. In addition, there was no obvious odor in the air around the sludge dryer. The results demonstrated that this drying and co-combustion system is efficient in controlling pollutants and is a feasible way for large-scale treatment of industrial sludge and sewage sludge. 相似文献
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Odor compounds from different sources of landfill: characterization and source identification 总被引:2,自引:0,他引:2
This study investigated the odor compounds from different areas in a landfill site, which included the municipal solid waste (MSW)-related area, the leachate-related area and the sludge-related area. Nine sampling points were placed and 35 types of odorous substances were measured and quantified from these grabbed samples. The results showed that the main odorous substances emitted from landfill site were styrene, toluene, xylene, acetone, methanol, n-butanone, n-butylaldehyde, acetic acid, dimethyl sulfide, dimethyl disulfide and ammonia. In the MSW-related area, the highest concentrations of oxygenated compounds were observed at the gas extraction wells (GW), while sulfur compounds were rare. Ammonia in the sludge-related area was very abundant. Sludge discharge area (SD1) and sludge disposal work place (SD2) were representative points of pre- and post-drying, in which the characterizations of the emitted odorous gas were different. After chemical drying, the concentration of ammonia increased, whereas those of volatile fatty acids and sulfur compounds decreased. In the leachate-related area, relatively low concentrations of all those odorants were detected in leachate storage pool (LS), which may be due to the enclosure operation of the leachate storage pool. Using principal components analysis and cluster analysis, GW, SD1 and SD2 were distinguished from the other sampling points. The typical odorants in GW were acetaldehyde, ethyl benzene, xylene, methylamine and dimethyl formamide. The typical odorants in SD1 were methyl mercaptan, valeric acid and isovaleric acid, while those in SD2 were carbon disulfide, acetone, 3-pentanone, methanol and trimethylamine. The typical odorants in other sampling points were hydrogen sulfide, n-butylaldehyde and acetic acid. 相似文献
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医疗废物焚烧厂二英排放对周边土壤的影响(2007-2014年) 总被引:1,自引:0,他引:1
2007-2014年期间对浙江省某医疗废物焚烧厂(MWI)周边土壤二英含量和指纹特征分布进行跟踪调查,研究焚烧运行排放的二英对周边土壤的影响程度.结果表明,运行前医疗废物焚烧厂周边2.4 km范围内土壤二英基线含量为1.09 ng·kg-1(以I-TEQ计),运行后土壤二英含量逐年增加,且距离烟囱500 m范围内增加幅度明显.2014年焚烧炉周边的土壤二英平均含量为7.05 ng·kg-1(以I-TEQ计),为基线含量(2007年)的6.47倍.且由主成分分析结果可知,土壤二英的指纹特征分布随着运行时间的增加趋向于焚烧排放的二英指纹特征,2011年和2014年的土壤采样点与焚烧源位置最接近,焚烧厂正常工况排放的烟气及飞灰和启炉工况下的烟气二英对周边土壤的影响程度较大. 相似文献
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亚热带典型小流域总氮最大日负荷(TMDL)及影响因子研究——以金井河流域为例 总被引:5,自引:0,他引:5
本研究以亚热带红壤丘陵区为研究区域,选取10个典型小流域,根据土地利用和畜禽养殖密度分为4种类型(森林、森林-种植、养殖和种植-养殖小流域),并基于近3年小流域把口站的原位观测数据,采用负荷历时曲线模型(LDC)计算了不同类型小流域水体总氮(TN)的最大日负荷(TMDL),运用灰度分析法定量研究了不同流量阶段小流域主要因子对TN负荷消减率的影响.结果表明,小流域TN负荷特征与流域类型密切相关,10个小流域TN年均负荷为739.0~2798.4 kg·km-2·a-1,由小到大依次为森林、森林-种植、养殖、种植-养殖小流域,其中,养殖、种植-养殖小流域水质整体超标严重,且应针对中、低流量条件下(秋、冬季节)负荷进行消减,而森林-种植小流域TN负荷超标情况略好,但高流量阶段(春、夏)超标率过高.灰度分析结果表明,TN负荷消减率在高、中流量阶段下主要受农田面积比例影响,而低流量阶段受畜禽密度影响.农田面积比例对高、中流量段TN消减率影响显著,而畜禽养殖密度在低流量段具有更大影响,小流域景观越破碎、类型越丰富、斑块分布越零散、形状越复杂,TN负荷通量则越大. 相似文献
129.
污泥衍生吸附剂对铅离子的吸附机理研究 总被引:4,自引:0,他引:4
研究了化学活化法热解制取污泥衍生吸附剂的工艺过程,得出相应工艺条件。利用污泥衍生吸附剂吸附溶液中重金属离子Pb^2+,得到动力学模型。实验结果表明:(1)该吸附过程分为3个阶段:初始阶段(t≤20min)、过渡阶段(20min〈t≤30min)和后期阶段(t〉30min),满足线性方程dC/dt=kC;(2)该吸附过程的吸附活化能E=26,5kJ/mol,吸附频率因子A=6900s^-1。整个吸附过程为扩散吸附,吸附传质速度由孔隙扩散阶段和内表面吸附共同控制。 相似文献
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