Treatment of molybdenum-containing wastewater and drinking water

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Abstract

Weak acidic iron coagulation sedimentation and filtration were used to treat molybdenum containing wastewater and drinking water. The solution pH was adjusted to study the influence of pH on molybdenum removal. The rule of iron coagulant to remove molybdenum use various pH and iron concentrations to study the removal efficiency. The results show that the molybdenum removal mechanism is a surface electrochemical adsorption process that could be fit by a Langmuir adsorption isotherm. The solution pH controls the process and the optimum pH ranges from 4.0 to 4.5. This process, which can be combined with conventional water plant treatments, can protect drinking water safety when the raw water contains trace molybdenum pollution. The molybdenum concentration of the effluent water will exceed the standards using only process for high concentration wastewater. Thus, secondary treatment is needed because there is equilibrium between the adsorption capacity and the effluent concentration. This process can be conducted in a simple treatment structure with limited coagulant dosage.

Keywords wastewater treatments molybdenum iron coagulation drinking water safety

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Issue Date: 15 May 2014

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	Pengfei LIN
	Xiaojian ZHANG
	Chao CHEN
	Jun WANG

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Pengfei LIN,Xiaojian ZHANG,Chao CHEN, et al. Treatment of molybdenum-containing wastewater and drinking water[J]. Journal of Tsinghua University(Science and Technology), 2014, 54(5): 613-618.

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http://jst.tsinghuajournals.com/EN/ OR http://jst.tsinghuajournals.com/EN/Y2014/V54/I5/613

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