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首页> 外文会议>Global Symposium on Recycling, Waste Treatment and Clean Technology; 20040926-29; Madrid(ES) >UTILISATION OF SAWDUST CHARCOAL IN TEXTILE WASTEWATER
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UTILISATION OF SAWDUST CHARCOAL IN TEXTILE WASTEWATER

机译：纺织废水中木屑木炭的利用

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Pre-treated sawdust charcoal by sulphuric acid had more surface area and porosity than sawdust charcoal. Acid pre-trearment increased the adsorption efficiency because acid could dissolve tars and the components of sawdust charcoal such as K and Ca and resulted in increasing of surface of porous sawdust charcoal. In the adsorption of synthetic reactive dye wastewater containing 400 mg g~(-1) dye solution, 90 g l~1 of sodium sulphate, 20 g l~1 of sodium carbonate, initial pH of 10.5+0.5, H_2SO_4-treated sawdust charcoal could decrease COD from 608 mg l~1 to 465 mg l~1, whereas sawdust charcoal increased to 626 mg l~1. Adjusting the initial pH of dye solution to 2.0 increased dye adsorption in both adsorbents, whereas the adsorption of synthetic reactive dye from wastewater by sawdust charcoal and H_2SO_4-treated sawdust charcoal can adsorb in wide range of initial pH of dye solution (pH 2.0-10.0). In addition, dissolving of K and Ca at the low pH of solution also caused precipitation of potassium hydroxide and calcium hydroxide that enhanced dye adsorption. The maximum adsorption capacity of synthetic reactive dye withinwastewater by sawdust charcoal and H_2SO_4-treated sawdust charcoal were 24.28 and 29.92 mg g~(-1), respectively. Pre-treatment of sawdust charcoal by H_2SO_4 could increase the dye adsorption capacity in textile wastewater.
机译：硫酸预处理的木屑木炭比木屑木炭具有更大的表面积和孔隙率。酸预处理可以吸收焦油和锯末木炭中的钾和钙等成分，并导致多孔木屑表面的增加，从而提高了吸附效率。在含有400 mg g〜（-1）染料溶液的合成活性染料废水，90 gl〜1的硫酸钠，20 gl〜1的碳酸钠，初始pH值为10.5 + 0.5，H_2SO_4处理的木屑炭的吸附过程中，吸附活性降低化学需氧量从608 mg l〜1增加到465 mg l〜1，而木屑木炭增加到626 mg l〜1。将染料溶液的初始pH值调整为2.0会增加两种吸附剂对染料的吸附，而锯末木炭和H_2SO_4处理过的锯末木炭对废水中合成活性染料的吸附可以在很宽的染料溶液初始pH值（pH 2.0-10.0）范围内进行吸附。 ）。另外，在溶液的低pH下溶解K和Ca也引起氢氧化钾和氢氧化钙的沉淀，这增强了染料的吸附。锯末木炭和H_2SO_4处理过的锯末木炭对废水中合成活性染料的最大吸附量分别为24.28和29.92 mg g〜（-1）。 H_2SO_4预处理木屑木炭可提高织物废水中染料的吸附能力。

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