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A platform for research: civil engineering, architecture and urbanism
Continuous composite remediation method for heavy metal polluted sediment
The invention discloses a remediation method for heavy metal polluted riverbed or lake sediment, the method comprises the following steps: carrying out heat treatment on the river or lake sediment to fix the heavy metals; picking and collecting aquatic plants on the riverbed or the embankment to be made into biochar, and fixing heavy metal contained in the biochar; and filling the biochar and the sediment subjected to heat treatment with polylactic acid fiber bags or jute bags respectively to prepare a biochar covering pad and a sediment covering pad, and binding the biochar covering pad and the sediment covering pad with hemp ropes to prepare the combined pad. Rhizomes and seeds for aquatic plant breeding are sown on in-situ sediment at the bottom of the riverbed and the lake needing remediation, then the combined pad is used for sealing and covering, the biochar covering pad is arranged on the lower portion, and the sediment covering pad is arranged on the upper portion. The process is repeated according to needs, and continuous remediation of the remediation area can be achieved. The method has the advantages that the total amount of heavy metal is not increased, operation is simple, direct or indirect fixation of the heavy metal can be achieved, disturbance to riverbed or lake sediment is small, and overall benefits are good.
本发明公开了一种对受重金属污染河床或湖泊底泥的修复方法，包括对河流或湖泊底泥进行热处理，使其重金属得到固定；将河床或堤岸上的水生植物采摘收集制作成生物炭并固定内含重金属；再用聚乳酸纤维袋或麻袋分别装填生物炭和热处理后的底泥，做成生物炭覆盖垫和底泥覆盖垫，并用麻绳加以捆绑制成组合垫。在需要修复的河床和湖泊底部原位底泥上播撒水生植物繁殖用根茎和种子，再用组合垫进行封盖，其中生物炭覆盖垫在下，底泥覆盖垫在上。根据需要，重复上述过程，可以实现被修复区域的持续修复。该方法具有不增加重金属总量，操作简单，可以实现重金属直接或间接固定，对河床或湖泊底泥扰动较少，整体效益佳等优点。
Continuous composite remediation method for heavy metal polluted sediment
The invention discloses a remediation method for heavy metal polluted riverbed or lake sediment, the method comprises the following steps: carrying out heat treatment on the river or lake sediment to fix the heavy metals; picking and collecting aquatic plants on the riverbed or the embankment to be made into biochar, and fixing heavy metal contained in the biochar; and filling the biochar and the sediment subjected to heat treatment with polylactic acid fiber bags or jute bags respectively to prepare a biochar covering pad and a sediment covering pad, and binding the biochar covering pad and the sediment covering pad with hemp ropes to prepare the combined pad. Rhizomes and seeds for aquatic plant breeding are sown on in-situ sediment at the bottom of the riverbed and the lake needing remediation, then the combined pad is used for sealing and covering, the biochar covering pad is arranged on the lower portion, and the sediment covering pad is arranged on the upper portion. The process is repeated according to needs, and continuous remediation of the remediation area can be achieved. The method has the advantages that the total amount of heavy metal is not increased, operation is simple, direct or indirect fixation of the heavy metal can be achieved, disturbance to riverbed or lake sediment is small, and overall benefits are good.
本发明公开了一种对受重金属污染河床或湖泊底泥的修复方法，包括对河流或湖泊底泥进行热处理，使其重金属得到固定；将河床或堤岸上的水生植物采摘收集制作成生物炭并固定内含重金属；再用聚乳酸纤维袋或麻袋分别装填生物炭和热处理后的底泥，做成生物炭覆盖垫和底泥覆盖垫，并用麻绳加以捆绑制成组合垫。在需要修复的河床和湖泊底部原位底泥上播撒水生植物繁殖用根茎和种子，再用组合垫进行封盖，其中生物炭覆盖垫在下，底泥覆盖垫在上。根据需要，重复上述过程，可以实现被修复区域的持续修复。该方法具有不增加重金属总量，操作简单，可以实现重金属直接或间接固定，对河床或湖泊底泥扰动较少，整体效益佳等优点。
Continuous composite remediation method for heavy metal polluted sediment
一种受重金属污染底泥的持续复合修复方法
GAO LIPING (author) / SUN QINJU (author) / LIN SHAOHUA (author) / XUAN YUE (author) / FAN SHUTING (author)
2021-12-03
Patent
Electronic Resource
Chinese
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