【摘要】 粤西徐闻九亩硅藻土表面多孔,除含有蛋白石外,还含有少量的蒙脱石等粘土矿物;其对水体中的Zn2+具有修复能力,且对Zn2+的吸附效率较高;宜在弱酸性-中性的pH值条件下修复Zn2+;在低Zn2+浓度下,硅藻土可以有效地去除Zn2+,而对硅藻土进行改性后将有利于对较高浓度的Zn2+进行修复;评价硅藻土对水体中Zn2+的修复效果应该综合考虑去除率与负载量,在Zn2+初始浓度为20m g/L时,徐闻九亩硅藻土吸附剂的用量应以10g/L为宜。更多还原

【Abstract】 The diatomite mineral in Xuwen and Jiumo of western Guangdong is porous on the surface.It contains less clay mineral as montomorillonite etc.besides opal.It is able to restore Zn2+ in water and effectively absorb Zn2+.It is fit for restoring Zn2+ in weak acid and neutral pH condition.Diatomite can eliminate Zn2+ effectively when Zn2+ concentration is lower,while highly concentrated Zn2+ can be restored after diatomite being modified;The removing rate and loading quantity should be considered comprehensively while evaluating the diatomite’s effect of restoring Zn2+ in water.When the initial concentration of Zn2+ is 20mg/L,the suitable dosage of diatomite sorbent in Xuwen and Jiumu should be 10g/L.更多还原