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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Partitioning and removal of Cd and Mn using a simulated mangrove wastewater treatment system
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Partitioning and removal of Cd and Mn using a simulated mangrove wastewater treatment system

机译：使用模拟红树林废水处理系统分配和去除Cd和Mn

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摘要

A greenhouse experiment was conducted to study the partitioning and removal of Cd and Mn from wastewater using constructed mangrove (Kandelia candel) wetland treatment system. Three different strengths of artificial wastewater passed through the system in fixed quantities. Artificial seawater was used as a control. Three different compositions were natural wastewater concentration (C_1), medium wastewater concentration (C_5) and concentrated wastewater concentrations (C_(10)). C_1 had the characteristics and strength similar to natural municipal wastewater while C_5 and C_(10) contained five and ten times of the nutrients and heavy metals in C_1, respectively. Results showed that the major portion of the Cd and Mn entering the simulated wastewater treatment system entered the sediment pool where approximately 88% to 95% of the Cd, and between 63% and 89% of Mn, was retained. The amount of added Cd and Mn in the wastewater found in plants were between 0.16% to 1.1%, and 1.7% to 13.9%, respectively. Within the total plant pool, roots accounted for between 30% and 39% of Cd, and from 0.65% to 7.3% of Mn; leaves contained between 19.9% to 30.5% of Cd, and from 7.8% to 41.0% of Mn; litterfall contained 12.3% to 20.6% of Cd, and from 15.2% to 70.3% of Mn, respectively. The averaged accumulative coefficients concentration in plant tissues/concentration in sediment in plant for Cd and Mn were 1.22 to 2.40 and 0.02 to 0.08, respectively. Assimilated Cd and Mn were stored in non-activity plant zones such as cell wall, supplimentary cells of the lenticel, stone cells, cell gaps in root and stem, etc. Kandelia candel seedlings had a relative high toxicity resistance to the two heavy metals.
机译：使用人工红树林湿地处理系统进行了温室试验，以研究废水中镉和锰的分配和去除。三种强度不同的人造废水以固定量通过系统。人造海水用作对照。三种不同的成分是天然废水浓度（C_1），中等废水浓度（C_5）和浓缩废水浓度（C_（10））。 C_1的特性和强度类似于天然城市废水，而C_5和C_（10）分别含有C_1中养分和重金属的五倍和十倍。结果表明，进入模拟废水处理系统的大部分Cd和Mn进入沉积池，其中约88％至95％的Cd和63％至89％的Mn被保留。在工厂发现的废水中，镉和锰的添加量分别在0.16％至1.1％和1.7％至13.9％之间。在整个植物库中，根占Cd的30％至39％，Mn的0.65％至7.3％。叶片中Cd含量在19.9％至30.5％之间，Mn含量在7.8％至41.0％之间。凋落物分别含Cd的12.3％至20.6％和Mn的15.2％至70.3％。 Cd和Mn的植物组织中平均累积系数浓度/植物沉积物中的浓度分别为1.22至2.40和0.02至0.08。吸收的镉和锰被储存在无活性的植物区，如细胞壁，皮孔的补充细胞，石细胞，根和茎的细胞间隙等。坎德里亚candel幼苗对这两种重金属具有较高的毒性。

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