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161.
The highly e cient inorganic polymer flocculants (IPFs) of the ferric-silica system is a new and promising coagulant. Interactions
between ferric species and silica play a large part in the coagulation of suspensions. These e ects are quite distinct from those associated
with polymeric or colloid silica. However, although these species are key to coagulation e ciency, they have not been comprehensively
discussed. A new type of coagulant, poly-silica-ferric-chloride (PFSC), was synthesized by co-polymerization and characterized by
time complexation spectroscopy and photon correlation spectroscopy. Compared with traditional ferric salt, the results indicated that
PFSC had a higher molecular weight, lesser positive charge, lower Feb and higher Fec. The higher the Si/Fe ratio, the higher the silica
and lower the silicac found. The PFSC with appropriate polysilica acid not only obtained better coagulation/flocculation e ciency in
turbidity removal, enhanced the flocculation index (FI) and provided less residual ferric, it also lowered water treatment costs compared
to traditional ferric salt. Results showed that PFSC could remove colloid particles in water by charge neutralization and sweeping,
adsorption bridging mechanism. 相似文献
162.
Hong Jianguo Chen Zhuming Huang Ying Cao Yue Geng Shuhua Zhang Yuwen Zou Xingli Lu Xionggang 《Journal of Material Cycles and Waste Management》2022,24(3):1072-1082
Journal of Material Cycles and Waste Management - The qualified green lightweight aggregate (LWA) was successfully prepared from steel mill sludge (SMS) and fly ash (FAS) in one step using the... 相似文献
163.
Zuo Xu Nie Jianxin Jiang Beier Jiang Aijun Zou Shiyang Wu Junrong Ding Bingquan Wang Xue hui Liu Yang 《Environmental science and pollution research international》2022,29(50):75597-75608
Environmental Science and Pollution Research - Advanced oxidation processes (AOPs) are efficient methods for water purification. However, there are few studies on using peroxymonosulfate (PMS) to... 相似文献
164.
Zhu Tianshun Wang Lihong Ding Xin Wen Zihao He Liang Chen Jing Yang Yang Liu Zugen Chen Jianfeng Zhang Meng 《Environmental science and pollution research international》2022,29(44):66413-66421
Environmental Science and Pollution Research - Turions production is the dominant means of propagation in Potamogeton crispus L. To understand how parental population and their living environmental... 相似文献
165.
Feng Yanlu Liu Tong Xu Siyi Ren Yiyi Ge Yiling Yin Lihong Pu Yuepu Liang Geyu 《Environmental science and pollution research international》2022,29(46):69153-69175
Environmental Science and Pollution Research - The health risks caused by environmental pollution have long been of substantial concern. With the development of epigenetics, a large number of... 相似文献
166.
Wang Tong Ma Yudiyang Li Ruiqing Sun Jinyi Huang Lihong Wang Shuwen Yu Chuanhua 《Environmental science and pollution research international》2022,29(58):87478-87489
Environmental Science and Pollution Research - Cardiovascular diseases (CVD) caused by household air pollution (HAP) have sparked widespread concern globally in the recent decade. Meanwhile,... 相似文献
167.
Zou Benteng Poncin Stéphane Bertinelli Luisito 《Environmental Modeling and Assessment》2022,27(5):883-900
Environmental Modeling & Assessment - Rare earth elements govern today’s high-tech world and are deemed to be essential for the attainment of sustainable development goals. Since the... 相似文献
168.
为了解决瓦斯浓度预测使用的单一数据在预测中影响还不够深入的问题,提出基于LSTM神经网络的多源数据融合瓦斯浓度预测模型。模型将上隅角瓦斯浓度、采煤机速度、工作面吨煤瓦斯涌出量等不同数据融合作为输入层参数,使用Adam优化算法更新LSTM网络层参数,利用Attention机制突出关键影响瓦斯浓度的因素,开展多源数据融合的瓦斯浓度预测,结合某矿1008工作面的实际数据,分析不同数据在瓦斯浓度预测中的作用。研究结果表明:单变量下的Attention-aLSTM预测效果相比LSTM提升14.2%;多源数据融合下的Attention-aLSTM相比自身提升了5%。 相似文献
169.
170.
This paper presents a multiple-pattern parameter identification and uncertainty analysis approach for robust water quality modeling using a neural network (NN) embedded genetic algorithm (GA). The modeling approach uses an adaptive NN–GA framework to inversely solve the governing equations in a water quality model for multiple parameter patterns, along with an alternating fitness method to maintain solution diversity. The procedure was demonstrated through a coupled 2D hydrodynamic and eutrophication model for Loch Raven Reservoir in Maryland. The inverse problem was formulated as a nonlinear optimization problem minimizing the degree of misfit (DOM) between model results and observed data. A set of NN models was developed to approximate the input-output response relationship of the Loch Raven Reservoir model and was incorporated into a GA framework in an adaptive fashion to search for near-optimal solutions minimizing the DOM. The numerical example showed that the adaptive NN–GA approach is capable of identifying multiple parameter patterns that reproduce the observed data equally well. The resulting parameter patterns were incorporated into the numerical model, and a multiple-pattern robust water quality modeling analysis, along with a compound margin of safety (CMOS) method, was proposed and applied to analyze the parameter pattern uncertainty. 相似文献