Heavy metal adsorbent based on plant straws and preparation method for heavy metal adsorbent
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A technology for plant straw and heavy metals, applied in the field of environmental management, can solve the problems of high operating costs, secondary pollution, large investment, etc., and achieve the effects of strong practicability, strong adsorption capacity, and good economy.
Inactive Publication Date: 2015-05-20
安徽省中日农业环保科技有限公司
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[0003] Traditional heavy metal wastewater treatment methods mainly include chemical precipitation method, ion exchange method, membrane separation method, etc. These methods usually have problems such as large investment, high energy consumption, high operating cost, and easy to produce secondary pollution, so their application is limited
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Embodiment 1
[0019] Example 1: Preparation of heavy metal adsorbent based on plant straw
[0020] A heavy metal adsorbent based on plant stalks, prepared from the following weight (kg) component raw materials:
[0024] The preparation method of auxiliary agent is:
[0025] Clean and crush fresh tea leaves, fresh pine needles and fresh mulberry leaves, mix them with sodium citrate, and grind them evenly, first add citric acid, oxalic acid and water and stir for 6 hours at 90°C and 400r / min, then add sodium lauroyl sarc...
Embodiment 2
[0029] Embodiment 2: to the adsorption effect of heavy metal lead and copper
[0030] Take by weighing sorbent material 0.5g among the embodiment 1, join 1L heavy metal lead ion concentration in the water of 0.1g / L, in room temperature adsorption 1h, detect the concentration of remaining lead ion in the solution, record that adsorption capacity is 33.4mg / L g.
[0031] Take by weighing 0.5 g of the adsorbent in Example 1, join 1L of heavy metal copper ion concentration in water of 0.1 g / L, absorb at room temperature for 1 h, detect the concentration of remaining copper ions in the solution, and record the adsorption capacity as 54.1 mg / L. g.
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Abstract
The invention discloses a heavy metal adsorbent based on plant straws. The heavy metal adsorbent is characterized by being prepared from the following raw materials in parts by weight: 10-15 parts of reed straws, 10-15 parts of corn straws, 3-5 parts of corn cobs, 3-5 parts of peat, 1-2 parts of carboxymethyl chitosan, 2-4 parts of malic acid, 0.3-0.5 part of gamma-polyglutamic acid, 1-2 parts of sodium gluconate, 2-4 parts of calcium chloride, 1-2 parts of sodium citrate, 4-6 parts of auxiliaries and 40-50 parts of water. According to the heavy metal adsorbent based on plant straws and the preparation method for the heavy metal adsorbent disclosed by the invention, agricultural wastes are effectively recycled to prepare the heavy metal adsorbent, so that the raw material source is wide, the price is low, the heavy metal bonding and adsorbing capacity is strong, and pollutants such as nitrogen and phosphor in water can be adsorbed. Moreover, the heavy metal adsorbent is safe, environmentally friendly, non-toxic and harmless, free of secondary pollution to the environment in a wastewater treatment process, good in economical efficiency and strong in practicability.
Description
technical field [0001] The invention relates to the field of environmental treatment, in particular to a plant straw-based heavy metal adsorbent and a preparation method thereof. Background technique [0002] With the development of the global economy and society, environmental pollution is becoming more and more serious. Industrial wastewater, as the main source of environmental pollution, has been a major problem that has plagued countries all over the world for a long time. Heavy metal ions in industrial wastewater have strong carcinogenic, teratogenic, and mutagenic effects, which pose a serious threat to human health and the ecological environment. Therefore, it is very important to strictly control the pollution of heavy metal wastewater. [0003] Traditional heavy metal wastewater treatment methods mainly include chemical precipitation, ion exchange, membrane separation, etc. These methods usually have problems such as large investment, high energy consumption, high o...
Claims
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Application Information
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